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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised
Search Symbol
CPC
COOPERATIVE PATENT CLASSIFICATION
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TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS [2013‑01]
NOTE

  • This subclass includes:
    • processes directed to natural rubber or to conjugated diene rubber (synthesis thereof C08F)
    • processes directed to rubbers in general (to a specified rubber, other than provided for by (a) above, C08F to C08H)
WARNING

  • The following IPC groups are not used in the CPC scheme. Subject matter covered by these groups is classified in the following CPC groups:
    C08C1/16 covered by C08C 1/14
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Treatment of rubber latex [2013‑01]
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C08C 1/02
.
Chemical or physical treatment of rubber latex before or during concentration [2013‑01]
C08C 1/04
. .
Purifying; Deproteinising [2013‑01]
C08C 1/06
. .
Preservation of rubber latex (preserving ingredients C08K) [2013‑01]
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C08C 1/065
. .
Increasing the size of dispersed rubber particles [2013‑01]
C08C 1/07
. . .
characterised by the agglomerating agents used [2013‑01]
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C08C 1/075
. .
Concentrating [2013‑01]
C08C 1/08
. . .
with the aid of creaming agents [2013‑01]
C08C 1/10
. . .
by centrifugation [2013‑01]
C08C 1/12
. . .
by evaporation [2013‑01]
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C08C 1/14
.
Coagulation [2013‑01]
C08C 1/145
. .
{
Heat-sensitising agents
}
[2013‑01]
C08C 1/15
. .
characterised by the coagulants used [2013‑01]
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Treatment of rubber solutions [2013‑01]
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C08C 2/02
.
Purification [2013‑01]
C08C 2/04
. .
Removal of catalyst residues [2013‑01]
C08C 2/06
.
Wining of rubber from solutions [2013‑01]
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Treatment of coagulated rubber [2013‑01]
C08C 3/02
.
Purification [2013‑01]
C08C 4/00
Treatment of rubber before vulcanisation, not provided for in groups C08C 1/00 to C08C 3/02 [2013‑01]
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Chemical modification of rubber (crosslinking agents, other than provided for by C08C 19/30, C08K) [2013‑01]
NOTE

  • In the absence of an indication to the contrary a process is classified in the last appropriate place
C08C 19/02
.
Hydrogenation [2013‑01]
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C08C 19/04
.
Oxidation [2013‑01]
C08C 19/06
. .
Epoxidation [2013‑01]
C08C 19/08
.
Depolymerisation [2013‑01]
C08C 2019/09
.
{
Metathese
}
[2013‑01]
C08C 19/10
.
Isomerisation; Cyclisation [2013‑01]
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C08C 19/12
.
Incorporating halogen atoms into the molecule [2013‑01]
C08C 19/14
. .
by reaction with halogens [2013‑01]
C08C 19/16
. .
by reaction with hydrogen halides [2013‑01]
C08C 19/18
. .
by reaction with hydrocarbons substituted by halogen [2013‑01]
C08C 19/20
.
Incorporating sulfur atoms into the molecule [2013‑01]
C08C 19/22
.
Incorporating nitrogen atoms into the molecule [2013‑01]
C08C 19/24
.
Incorporating phosphorus atoms into the molecule [2013‑01]
C08C 19/25
.
Incorporating silicon atoms into the molecule [2013‑01]
C08C 19/26
.
Incorporating metal atoms into the molecule [2013‑01]
C08C 19/28
.
Reaction with compounds containing carbon-to-carbon unsaturated bonds (graft polymers C08F) [2013‑01]
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C08C 19/30
.
Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule [2013‑01]
C08C 19/32
. .
reacting with halogens or halogen-containing groups [2013‑01]
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C08C 19/34
. .
reacting with oxygen or oxygen-containing groups [2013‑01]
C08C 19/36
. . .
with carboxy radicals [2013‑01]
C08C 19/38
. . .
with hydroxy radicals [2013‑01]
C08C 19/40
. . .
with epoxy radicals [2013‑01]
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C08C 19/42
. .
reacting with metals or metal-containing groups [2013‑01]
C08C 19/44
. . .
of polymers containing metal atoms exclusively at one or both ends of the skeleton [2013‑01]
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013