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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="C25C" definition-exists="true" date-revised="2020-05-01" status="published"><classification-symbol>C25C</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS</text></title-part><title-part><text>APPARATUS THEREFOR</text></title-part></class-title><notes-and-warnings><note type="warning"><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>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="C25C1/00" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/00</classification-symbol>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C25C1/00" definition-exists="true" ipc-concordant="C25C1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrolytic production, recovery or refining of metals by electrolysis of solutions </text><reference><text><class-ref scheme="cpc">C25C5/00</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C1/02" definition-exists="false" ipc-concordant="C25C1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of light metals</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C1/04" definition-exists="false" ipc-concordant="C25C1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in mercury cathode cells</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C1/06" definition-exists="false" ipc-concordant="C25C1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>or iron group metals, refractory metals or manganese</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C1/08" definition-exists="false" ipc-concordant="C25C1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of nickel or cobalt</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C1/10" definition-exists="false" ipc-concordant="C25C1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of chromium or manganese</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C1/12" definition-exists="false" ipc-concordant="C25C1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of copper</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C1/14" definition-exists="false" ipc-concordant="C25C1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of tin</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C1/16" definition-exists="false" ipc-concordant="C25C1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of zinc, cadmium or mercury</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C1/18" definition-exists="false" ipc-concordant="C25C1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of lead</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C1/20" definition-exists="false" ipc-concordant="C25C1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of noble metals</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C1/22" definition-exists="false" ipc-concordant="C25C1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>C25C1/22</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>of metals not provided for in groups <class-ref scheme="cpc">C25C1/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">C25C1/20</class-ref></text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C1/24" definition-exists="false" ipc-concordant="C25C1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C1/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Alloys obtained by cathodic reduction of all their ions</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C25C3/00" definition-exists="true" ipc-concordant="C25C3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrolytic production, recovery or refining of metals by electrolysis of melts </text><reference><text><class-ref scheme="cpc">C25C5/00</class-ref> takes precedence</text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C3/02" definition-exists="false" ipc-concordant="C25C3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of alkali or alkaline earth metals</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C3/04" definition-exists="false" ipc-concordant="C25C3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of magnesium</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C3/06" definition-exists="false" ipc-concordant="C25C3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of aluminium</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C3/08" definition-exists="true" ipc-concordant="C25C3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cell construction, e.g. bottoms, walls, cathodes</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C25C3/085" definition-exists="false" ipc-concordant="C25C3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by its non electrically conducting heat insulating parts</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C25C3/10" definition-exists="false" ipc-concordant="C25C3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>External supporting frames or structures</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="C25C3/12" definition-exists="true" ipc-concordant="C25C3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anodes</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="C25C3/125" definition-exists="true" ipc-concordant="C25C3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on carbon</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C3/14" definition-exists="false" ipc-concordant="C25C3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Devices for feeding or crust breaking</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C3/16" definition-exists="false" ipc-concordant="C25C3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electric current supply devices, e.g. bus bars</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C3/18" definition-exists="false" ipc-concordant="C25C3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrolytes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C3/20" definition-exists="true" ipc-concordant="C25C3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Automatic control or regulation of cells </text><reference><text>controlling or regulating in general <class-ref scheme="cpc">G05</class-ref></text></reference></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C3/22" definition-exists="false" ipc-concordant="C25C3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Collecting emitted gases</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C3/24" definition-exists="false" ipc-concordant="C25C3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Refining</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C3/26" definition-exists="true" ipc-concordant="C25C3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of titanium, zirconium, hafnium, tantalum or vanadium</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C3/28" definition-exists="true" ipc-concordant="C25C3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of titanium</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C3/30" definition-exists="false" ipc-concordant="C25C3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of manganese</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C3/32" definition-exists="false" ipc-concordant="C25C3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of chromium</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C3/34" definition-exists="false" ipc-concordant="C25C3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>C25C3/34</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>of metals not provided for in groups <class-ref scheme="cpc">C25C3/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">C25C3/32</class-ref></text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C3/36" definition-exists="false" ipc-concordant="C25C3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C3/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Alloys obtained by cathodic reduction of all their ions</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C25C5/00" definition-exists="false" ipc-concordant="C25C5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrolytic production, recovery or refining of metal powders or porous metal masses</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C5/02" definition-exists="false" ipc-concordant="C25C5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from solutions</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C5/04" definition-exists="false" ipc-concordant="C25C5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>from melts</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="C25C7/00" definition-exists="true" ipc-concordant="C25C7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>C25C7/00</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Constructional parts, or assemblies thereof, of cells</text></title-part><title-part><text>Servicing or operating of cells </text><reference><text>for the production of aluminium <class-ref scheme="cpc">C25C3/06</class-ref>&#160;-&#160;<class-ref scheme="cpc">C25C3/22</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C7/002" definition-exists="false" ipc-concordant="C25C7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>C25C7/002</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>of cells comprising at least an electrode made of particles </text><reference><text><class-ref scheme="cpc">C25C7/005</class-ref>, <class-ref scheme="cpc">C25C7/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">C25C7/06</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C7/005" definition-exists="false" ipc-concordant="C25C7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>C25C7/005</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>of cells for the electrolysis of melts </text><reference><text><class-ref scheme="cpc">C25C7/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">C25C7/06</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C7/007" definition-exists="true" ipc-concordant="C25C7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>C25C7/007</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>of cells comprising at least a movable electrode </text><reference><text><class-ref scheme="cpc">C25C7/002</class-ref>, <class-ref scheme="cpc">C25C7/02</class-ref>&#160;-&#160;<class-ref scheme="cpc">C25C7/06</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C7/02" definition-exists="false" ipc-concordant="C25C7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>C25C7/02</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Electrodes </text><reference><text>consumable anodes for the refining the metals <class-ref scheme="cpc">C25C1/00</class-ref>&#160;-&#160;<class-ref scheme="cpc">C25C5/00</class-ref></text></reference></title-part><title-part><text>Connections thereof</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C7/025" definition-exists="false" ipc-concordant="C25C7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C7/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used in cells for the electrolysis of melts</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C7/04" definition-exists="true" ipc-concordant="C25C7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diaphragms</text></title-part><title-part><text>Spacing elements</text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="C25C7/06" definition-exists="true" ipc-concordant="C25C7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Operating or servicing</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="C25C7/08" definition-exists="false" ipc-concordant="C25C7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>C25C7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating of deposited metals from the cathode</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></class-scheme>