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CPC Subclass Not Allocatable
C08J

WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)

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.

112 direct subcodes

Child Classifications

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  • C08J 2317/00 Characterised by the use of reclaimed rubber

Top Applicants

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

  1. LG CHEM KR 15,432
  2. DOW GLOBAL TECHNOLOGIES US 14,214
  3. BASF (BADISCHE ANILIN & SODA FABRIK) DE 11,155
  4. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,455
  5. FUJIFILM JP 6,178
  6. CHINESE ACADEMY OF SCIENCES 5,569
  7. SHIN-ETSU CHEMICAL COMPANY JP 5,506
  8. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 5,443
  9. TORAY INDUSTRIES JP 4,635
  10. NITTO DENKO CORPORATION JP 4,620