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103 lines
54 KiB
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103 lines
54 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="C23F" definition-exists="true" date-revised="2019-08-01" status="published"><classification-symbol>C23F</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE </text><reference><text>working metal by laser beams <class-ref scheme="cpc">B23K26/00</class-ref>; desurfacing by applying flames <class-ref scheme="cpc">B23K7/00</class-ref>; working of metal by electro-erosion <class-ref scheme="cpc">B23H</class-ref>; producing decorative effects by removing surface material, e.g. by engraving, by etching, <class-ref scheme="cpc">B44C1/22</class-ref>; electrolytic etching or polishing <class-ref scheme="cpc">C25F</class-ref></text></reference></title-part><title-part><text>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL</text></title-part><title-part><text>MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS <class-ref scheme="cpc">C23</class-ref> AND AT LEAST ONE PROCESS COVERED BY SUBCLASS <class-ref scheme="cpc">C21D</class-ref> OR <class-ref scheme="cpc">C22F</class-ref> OR CLASS <class-ref scheme="cpc">C25</class-ref></text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>protective layers or coating compositions or methods of applying them; these are classified in the appropriate places, e.g. <class-ref scheme="cpc">B05</class-ref>, <class-ref scheme="cpc">B44</class-ref>, <class-ref scheme="cpc">C09D</class-ref>, <class-ref scheme="cpc">C23C</class-ref>.</note-paragraph><note-paragraph>mechanical devices or constructional features of particular articles for inhibiting incrustation; these are classified in the appropriate places, e.g. in pipes or pipe fittings <class-ref scheme="cpc">F16L58/00</class-ref>.</note-paragraph><note-paragraph>articles characterised by being made of materials selected for their properties of resistance to corrosion or incrustation; these are classified in the appropriate places, e.g. turbine blades <class-ref scheme="cpc">F01D5/28</class-ref>.</note-paragraph></note><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC group is not in the CPC scheme. The subject matter for this IPC group is classified in the following CPC groups: <table><row><entry><class-ref scheme="ipc">C23F1/24</class-ref></entry><entry> covered by </entry><entry> <class-ref scheme="cpc">C09K13/00</class-ref>, <class-ref scheme="cpc">H01L21/00</class-ref> </entry></row></table></note-paragraph><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="C23F1/00" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C23F1/00" definition-exists="true" ipc-concordant="C23F1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Etching metallic material by chemical means </text><reference><text>manufacture of printing surfaces <class-ref scheme="cpc">B41C</class-ref>; manufacture of printed circuits <class-ref scheme="cpc">H05K</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F1/02" definition-exists="false" ipc-concordant="C23F1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Local etching</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C23F1/04" definition-exists="false" ipc-concordant="C23F1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Chemical milling</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F1/06" definition-exists="false" ipc-concordant="C23F1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sharpening files</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F1/08" definition-exists="false" ipc-concordant="C23F1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Apparatus, e.g. for photomechanical printing surfaces </text><reference><text>photo- mechanical reproduction <class-ref scheme="cpc">G03F</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F1/10" definition-exists="false" ipc-concordant="C23F1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Etching compositions </text><reference><text><class-ref scheme="cpc">C23F1/44</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C23F1/12" definition-exists="false" ipc-concordant="C23F1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gaseous compositions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C23F1/14" definition-exists="false" ipc-concordant="C23F1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aqueous compositions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F1/16" definition-exists="false" ipc-concordant="C23F1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Acidic compositions </text><reference><text><class-ref scheme="cpc">C23F1/42</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F1/18" definition-exists="false" ipc-concordant="C23F1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for etching copper or alloys thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F1/20" definition-exists="false" ipc-concordant="C23F1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for etching aluminium or alloys thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F1/22" definition-exists="false" ipc-concordant="C23F1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for etching magnesium or alloys thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F1/26" definition-exists="false" ipc-concordant="C23F1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for etching refractory metals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F1/28" definition-exists="false" ipc-concordant="C23F1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for etching iron group metals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F1/30" definition-exists="false" ipc-concordant="C23F1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for etching other metallic material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F1/32" definition-exists="false" ipc-concordant="C23F1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Alkaline compositions </text><reference><text><class-ref scheme="cpc">C23F1/42</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F1/34" definition-exists="false" ipc-concordant="C23F1/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for etching copper or alloys thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F1/36" definition-exists="false" ipc-concordant="C23F1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for etching aluminium or alloys thereof</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F1/38" definition-exists="false" ipc-concordant="C23F1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for etching refractory metals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F1/40" definition-exists="false" ipc-concordant="C23F1/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for etching other metallic material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F1/42" definition-exists="false" ipc-concordant="C23F1/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>containing a dispersed water-immiscible liquid</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F1/44" definition-exists="false" ipc-concordant="C23F1/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Compositions for etching metallic material from a metallic material substrate of different composition</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F1/46" definition-exists="false" ipc-concordant="C23F1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F1/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Regeneration of etching compositions</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C23F3/00" definition-exists="true" ipc-concordant="C23F3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Brightening metals by chemical means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F3/02" definition-exists="false" ipc-concordant="C23F3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Light metals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C23F3/03" definition-exists="false" ipc-concordant="C23F3/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F3/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with acidic solutions</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F3/04" definition-exists="false" ipc-concordant="C23F3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Heavy metals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C23F3/06" definition-exists="false" ipc-concordant="C23F3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with acidic solutions</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C23F4/00" definition-exists="true" ipc-concordant="C23F4/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F4/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Processes for removing metallic material from surfaces, not provided for in group <class-ref scheme="cpc">C23F1/00</class-ref> or <class-ref scheme="cpc">C23F3/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F4/02" definition-exists="false" ipc-concordant="C23F4/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F4/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by evaporation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F4/04" definition-exists="false" ipc-concordant="C23F4/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F4/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by physical dissolution</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C23F11/00" definition-exists="true" ipc-concordant="C23F11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F11/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent </text><reference><text>adding inhibitors to mineral oil, fuels, or lubricants <class-ref scheme="cpc">C10</class-ref>; adding inhibitors to pickling solutions <class-ref scheme="cpc">C23G</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F11/02" definition-exists="false" ipc-concordant="C23F11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F11/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in air or gases by adding vapour phase inhibitors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F11/04" definition-exists="false" ipc-concordant="C23F11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F11/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in markedly acid liquids</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F11/06" definition-exists="false" ipc-concordant="C23F11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F11/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in markedly alkaline liquids</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F11/08" definition-exists="false" ipc-concordant="C23F11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F11/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in other liquids</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C23F11/10" definition-exists="false" ipc-concordant="C23F11/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F11/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using organic inhibitors</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>A compound is classified in the last appropriate place.</note-paragraph><note-paragraph>Esters or anhydrides of organic acids are classified as the relevant acid unless otherwise indicated. Salts of a compound with an inorganic compound are classified as that compound unless specifically provided for.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F11/12" definition-exists="false" ipc-concordant="C23F11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F11/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Oxygen-containing compounds</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/122" definition-exists="false" ipc-concordant="C23F11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/122</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Alcohols; Aldehydes; Ketones</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/124" definition-exists="false" ipc-concordant="C23F11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/124</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Carboxylic acids</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="C23F11/126" definition-exists="false" ipc-concordant="C23F11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/126</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Aliphatic acids</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/128" definition-exists="false" ipc-concordant="C23F11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/128</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Esters of carboxylic acids</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F11/14" definition-exists="false" ipc-concordant="C23F11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/14</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Nitrogen-containing compounds</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/141" definition-exists="false" ipc-concordant="C23F11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/141</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Amines; Quaternary ammonium compounds</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="C23F11/142" definition-exists="false" ipc-concordant="C23F11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/142</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Hydroxy amines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="C23F11/143" definition-exists="false" ipc-concordant="C23F11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/143</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Salts of amines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/144" definition-exists="false" ipc-concordant="C23F11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/144</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Aminocarboxylic acids</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/145" definition-exists="false" ipc-concordant="C23F11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/145</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Amides; N-substituted amides</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/146" definition-exists="false" ipc-concordant="C23F11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/146</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>containing a multiple nitrogen-to-carbon bond</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/147" definition-exists="false" ipc-concordant="C23F11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/147</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>containing a nitrogen-to-oxygen bond</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/148" definition-exists="false" ipc-concordant="C23F11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/148</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>containing a nitrogen-to-nitrogen bond</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/149" definition-exists="false" ipc-concordant="C23F11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/149</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Heterocyclic compounds containing nitrogen as hetero atom</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F11/16" definition-exists="false" ipc-concordant="C23F11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/16</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Sulfur-containing compounds</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/161" definition-exists="false" ipc-concordant="C23F11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/161</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Mercaptans</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/162" definition-exists="false" ipc-concordant="C23F11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/162</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Thioaldehydes; Thioketones</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/163" definition-exists="false" ipc-concordant="C23F11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/163</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Sulfonic acids</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/164" definition-exists="false" ipc-concordant="C23F11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/164</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>containing a -SO<sub>2</sub>-N group</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/165" definition-exists="false" ipc-concordant="C23F11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/165</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Heterocyclic compounds containing sulfur as hetero atom</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F11/167" definition-exists="false" ipc-concordant="C23F11/167" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F11/167</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Phosphorus-containing compounds</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/1673" definition-exists="false" ipc-concordant="C23F11/167" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/1673</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Esters of phosphoric or thiophosphoric acids</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/1676" definition-exists="false" ipc-concordant="C23F11/167" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/1676</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Phosphonic acids</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F11/173" definition-exists="false" ipc-concordant="C23F11/173" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F11/173</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Macromolecular compounds</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C23F11/18" definition-exists="false" ipc-concordant="C23F11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F11/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using inorganic inhibitors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F11/181" definition-exists="false" ipc-concordant="C23F11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/181</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Nitrogen containing compounds</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F11/182" definition-exists="false" ipc-concordant="C23F11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/182</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Sulfur, boron or silicon containing compounds</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F11/184" definition-exists="false" ipc-concordant="C23F11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/184</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Phosphorous, arsenic, antimony or bismuth containing compounds</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F11/185" definition-exists="false" ipc-concordant="C23F11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/185</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Refractory metal-containing compounds</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F11/187" definition-exists="false" ipc-concordant="C23F11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/187</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Mixtures of inorganic inhibitors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F11/188" definition-exists="false" ipc-concordant="C23F11/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>C23F11/188</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>containing phosphates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C23F13/00" definition-exists="true" ipc-concordant="C23F13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Inhibiting corrosion of metals by anodic or cathodic protection</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F13/005" definition-exists="false" ipc-concordant="C23F13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Anodic protection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F13/02" definition-exists="false" ipc-concordant="C23F13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>cathodic</text></title-part><title-part><text>Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C23F13/04" definition-exists="false" ipc-concordant="C23F13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling or regulating desired parameters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C23F13/06" definition-exists="false" ipc-concordant="C23F13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional parts, or assemblies of cathodic-protection apparatus</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C23F13/08" definition-exists="false" ipc-concordant="C23F13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes specially adapted for inhibiting corrosion by cathodic protection</text></title-part><title-part><text>Manufacture thereof</text></title-part><title-part><text>Conducting electric current thereto</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F13/10" definition-exists="false" ipc-concordant="C23F13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes characterised by the structure </text><reference><text><class-ref scheme="cpc">C23F13/16</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F13/12" definition-exists="false" ipc-concordant="C23F13/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes characterised by the material </text><reference><text><class-ref scheme="cpc">C23F13/16</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="C23F13/14" definition-exists="false" ipc-concordant="C23F13/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Material for sacrificial anodes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F13/16" definition-exists="false" ipc-concordant="C23F13/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrodes characterised by the combination of the structure and the material</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F13/18" definition-exists="false" ipc-concordant="C23F13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for supporting electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F13/20" definition-exists="false" ipc-concordant="C23F13/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Conducting electric current to electrodes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C23F13/22" definition-exists="false" ipc-concordant="C23F13/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F13/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monitoring arrangements therefor</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C23F14/00" definition-exists="true" ipc-concordant="C23F14/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>C23F14/00</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes </text><reference><text>adding scale preventives or removers to water <class-ref scheme="cpc">C02F5/00</class-ref> </text><CPC-specific-text><text>; inhibiting incrustation in polymerisation reactors <class-ref scheme="cpc">C23F15/005</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F14/02" definition-exists="false" ipc-concordant="C23F14/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F14/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by chemical means</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C23F15/00" definition-exists="true" ipc-concordant="C23F15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F15/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Other methods of preventing corrosion or incrustation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C23F15/005" definition-exists="false" ipc-concordant="C23F15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F15/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inhibiting incrustation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C23F17/00" definition-exists="true" ipc-concordant="C23F17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>C23F17/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Multi-step processes for surface treatment of metallic material involving at least one process provided for in class <class-ref scheme="cpc">C23</class-ref> and at least one process covered by subclass <class-ref scheme="cpc">C21D</class-ref> or <class-ref scheme="cpc">C22F</class-ref> or class <class-ref scheme="cpc">C25</class-ref> </text><reference><text>coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups <class-ref scheme="cpc">C23C2/00</class-ref> - <class-ref scheme="cpc">C23C26/00</class-ref>, or by combinations of methods providedfor in subclasses <class-ref scheme="cpc">C23C</class-ref> and <class-ref scheme="cpc">C25D</class-ref>, <class-ref scheme="cpc">C23C28/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="C23F201/00" date-revised="2013-01-01" status="published"><classification-symbol>C23F2201/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="C23F201/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2201/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Type of materials to be protected by cathodic protection</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="C23F201/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2201/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Concrete, e.g. reinforced</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="C23F213/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2213/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aspects of inhibiting corrosion of metals by anodic or cathodic protection</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="C23F213/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2213/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Controlling or regulating parameters</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="C23F213/11" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2213/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for structures subject to stray currents</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="C23F213/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2213/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional parts or assemblies of the anodic or cathodic protection apparatus</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="C23F213/21" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2213/21</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combining at least two types of anodic or cathodic protection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="C23F213/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2213/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>characterized by the ionic conductor, e.g. humectant, hydratant or backfill</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="C23F213/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2213/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anodic or cathodic protection specially adapted for a specific object</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="C23F213/31" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2213/31</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Immersed structures, e.g. submarine structures</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="C23F213/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C23F2213/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pipes</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></class-scheme> |