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CPC Subclass Not Allocatable
C08C

TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS

Description

C08C covers chemical and physical treatment processes applied to natural or synthetic rubber polymers to alter their properties or performance characteristics. This includes vulcanization, cross-linking, grafting, blending with other polymers or additives, and structural modifications such as halogenation or oxidation. The subclass encompasses both batch and continuous treatment methods intended to improve elasticity, durability, processing behavior, or functional properties of rubber materials. Adjacent classes C08F (macromolecular compound synthesis) and C08L (polymer compositions and blends) are distinguished by focusing on the modification of pre-formed rubber rather than polymerization reactions or final formulated compositions.

5 direct subcodes

Child Classifications

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  • C08C 4/00 Treatment of rubber before vulcanisation, not provided for in groups C08C1/00 - C08C3/02

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