Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subclass
C08J

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

In class comparison

C08J ranks 4th of 8 subclasses with filings in C08, with 263,834 applications between 2013 and 2023, 15.3% of the class. Annual filings grew 23% from 2013 to 2023, above the class as a whole (+10%).

Subclasses of class C08 by patent applications, 2013–2023
RankSubclassTitleApplicationsShare
1C08L, Compositions of Macromolecular CompoundsCompositions of Macromolecular Compounds517,48429.9%
2C08K, Use of Inorganic or Non-Macromolecular Organic Substances as Compounding IngredientsUse of Inorganic or Non-Macromolecular Organic Substances as Compounding Ingredients379,18321.9%
3C08G, Macromolecular Compounds Obtained Otherwise Than by Reactions Only Involving Carbon-To-Carbon Unsaturated BondsMacromolecular Compounds Obtained Otherwise Than by Reactions Only Involving Carbon-To-Carbon Unsaturated Bonds283,42416.4%
4C08JWorking-Up; General Processes of Compounding; After-Treatment Not Covered by Subclasses , , , or263,83415.3%
5C08F, Macromolecular Compounds Obtained by Reactions Only Involving Carbon-To-Carbon Unsaturated BondsMacromolecular Compounds Obtained by Reactions Only Involving Carbon-To-Carbon Unsaturated Bonds222,01312.8%
6C08B, Polysaccharides; Derivatives ThereofPolysaccharides; Derivatives Thereof45,7172.6%
7C08H, Derivatives of Natural Macromolecular CompoundsDerivatives of Natural Macromolecular Compounds8,7570.5%
8C08C, Treatment or Chemical Modification of RubbersTreatment or Chemical Modification of Rubbers7,5570.4%

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

Navigate with arrow keys, Enter to open

  • 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

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