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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC)

CPC
COOPERATIVE PATENT CLASSIFICATION
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CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING (bleaching of leather or furs D06L; dyeing of leather or furs D06P)
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Chemical treatment prior to tanning
C14C 1/02
.
Curing raw hides
C14C 1/04
.
Soaking
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C14C 1/06
.
Facilitating unhairing, e.g. by painting, by liming
C14C 1/065
. .
{
Enzymatic unhairing
}
C14C 1/08
.
Deliming; Bating; Pickling; Degreasing
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Tanning; Compositions for tanning
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C14C 3/02
.
Chemical tanning
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C14C 3/04
. .
Mineral tanning
C14C 3/06
. . .
using chromium compounds
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C14C 3/08
. .
by organic agents
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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
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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
Degreasing leather
Pasting processes (chemical part)
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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
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Surface finishing of leather
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C14C 11/003
.
{
using macromolecular compounds
}
C14C 11/006
. .
{
using polymeric products of isocyanates (or isothiocyanates) with compounds having active hydrogen
}
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Manufacture of special kinds or leather, e.g. vellum (chamois tanning C14C 3/14)
C14C 13/02
.
Manufacture of technical leather
Apparatus for chemical treatment or washing of hides, skins, or leather
Subject matter not provided for in other groups of this subclass
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013