C09HPREPARATION OF GLUE OR GELATINEIn this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. C09H1/00 C09H1/00Pretreatment of collagen-containing raw materials for the manufacture of glue C09H1/02of bones defatting bones C11B C09H1/04of hides, hoofs, or leather scrap recovery of tanning agents C14C C09H3/00Isolation of glue or gelatine from raw materials, e.g. by extracting, by heating gelatine for foodstuffs A23J1/10 C09H3/02Purification of solutions of gelatine C09H5/00Stabilisation of solutions of glue or gelatine C09H7/00Preparation of water-insoluble gelatine C09H9/00Drying of glue or gelatine C09H9/02in the form of foils C09H9/04in the form of granules, e.g. beads C09H11/00Adhesives based on glue or gelatine