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CPC
COOPERATIVE PATENT CLASSIFICATION
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C14C
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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C14C 1/00
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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C14C 3/00
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
C14C 5/00
Degreasing leather
C14C 7/00
Pasting processes (chemical part)
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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
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C14C 11/00
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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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
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Last Modified: 04/16/2013 4:31:16 PM