WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

C14C　CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g.

C14C 1/00 Chemical treatment prior to tanning

C14C 1/02 ・Curing raw hides

C14C 1/04 ・Soaking

C14C 1/06 ・Facilitating unhairing, e.g. by painting, by liming

C14C 1/065 ・・{Enzymatic unhairing}

C14C 1/08 ・Deliming; Bating; Pickling; Degreasing

C14C 3/00 Tanning; Compositions for tanning

C14C 3/02 ・Chemical tanning

C14C 3/04 ・・Mineral tanning

C14C 3/06 ・・・using chromium compounds

C14C 3/08 ・・by organic agents

C14C 3/10 ・・・Vegetable tanning

C14C 3/12 ・・・・using purified or modified vegetable tanning agents

C14C 3/14 ・・・Fat tanning; Oil tanning

C14C 3/16 ・・・using aliphatic aldehydes

C14C 3/18 ・・・using polycondensation products or precursors thereof

C14C 3/20 ・・・・sulfonated

C14C 3/22 ・・・using polymerisation products

C14C 3/24 ・・・using lignin derivatives, e.g. sulfate liquor

C14C 3/26 ・・・using other organic substances, containing halogen

C14C 3/28 ・・Multi-step processes

C14C 3/30 ・・using physical means combined with chemical means

C14C 3/32 ・Recovering tanning agents from leather

C14C 5/00 Degreasing leather

C14C 7/00 Pasting processes (chemical part)

C14C 9/00 Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes

C14C 9/02 ・using fatty or oily materials, e.g. fat liquoring

C14C 9/04 ・Fixing tanning agents in the leather

C14C 11/00 Surface finishing of leather

C14C 11/003 ・{using macromolecular compounds}

C14C 11/006 ・・{using polymeric products of isocyanates (or isothiocyanates) with compounds having active hydrogen}

C14C 13/00 Manufacture of special kinds or leather, e.g. vellum (chamois tanning C14C 3/14)

C14C 13/02 ・Manufacture of technical leather

C14C 15/00 Apparatus for chemical treatment or washing of hides, skins, or leather

C14C 99/00 Subject matter not provided for in other groups of this subclass