WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES , , , or

Introduced: September 1968

Last revised: July 1974

Classification Context

Section:: CHEMISTRY; METALLURGY
Class:: ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
Subclass:: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES , , , or

Description

C08J covers general processing, compounding, and post-treatment operations for organic macromolecular compounds (polymers, rubbers, resins) that are not specifically classified in other C08 subclasses. This includes mixing, blending, plasticizing, cross-linking, vulcanization, and mechanical working-up of polymeric materials to modify their properties or prepare composite formulations. The subclass captures broad processing techniques applicable across multiple polymer types and applications, serving as a residual category for compounding operations and after-treatments not detailed in specialized divisions such as polyurethanes (C08G), elastomers (C08C), or specific polymer synthesis routes.

Filing statistics

IPC subclass C08J recorded 263,834 patent applications worldwide between 2013 and 2023. Annual filings grew from 19,276 in 2013 to 23,653 in 2023 (+23%), peaking at 27,027 applications in 2020. The most active applicants in class C08 are LG CHEM (14,262 applications), DOW GLOBAL TECHNOLOGIES (12,486 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (9,858 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Glossary

expandable includes expanding, pre-expanded or expanded'

Limiting references

Manufacture of semi-permeable membranes for separation processes or apparatus. Mechanical aspects of shaping of plastics or substances in a plastic state for the production of porous or cellular articles , Mechanical aspects Plasticisers Crosslinking agents Coating articles of macromolecular substances with metallic materials. ,

Application references

Treatment of macromolecular material specially adapted to enhance its filling properties in mortars, concrete or artificial stone , ,

Related Keywords

polymer EMULSION(S)working-up POLYADDITIONworking-up POLYCONDENSATIONpost POLYMERISATION treatments in generalworking-up POLYMERSworking-up natural RUBBERafter-treatment of synthetic RUBBER polymerisatesworking-up synthetic RUBBERWORKING-UP macromolecular substances in general

6 direct subcodes

Child Classifications

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C08J 11/00 Recovery or working-up of waste materials
C08J 3/00 Processes of treating or compounding macromolecular substances
C08J 5/00 Manufacture of articles or shaped materials containing macromolecular substances
C08J 7/00 Chemical treatment or coating of shaped articles made of macromolecular substances
C08J 9/00 Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
C08J 99/00 Subject matter not provided for in other groups of this subclass

Top Applicants

Top 10 applicants by patent filingsfor class C08, 2013–2023, worldwide · Source: EPO PATSTAT

LG CHEM KR 14,262
DOW GLOBAL TECHNOLOGIES US 12,486
BASF (BADISCHE ANILIN & SODA FABRIK) DE 9,858
SINOPEC (CHINA PETROCHEMICAL CORPORATION) 7,877
CHINESE ACADEMY OF SCIENCES 6,993
FUJIFILM JP 5,049
3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 4,923
SHIN-ETSU CHEMICAL COMPANY JP 4,517
BOREALIS AT 4,213
ARKEMA FR 4,098