IPC Subgroup
C08L 23/26 modified by chemical after-treatment
Introduced: July 1974
Last revised: January 2025
Full Title
Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers > modified by chemical after-treatment
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- Subclass:
- COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
4 direct subcodes
Child Classifications
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- C08L 23/28 by reaction with halogens or halogen-containing compounds
- C08L 23/3 by oxidation
- C08L 23/32 by reaction with compounds containing phosphorus or sulfur
- C08L 23/36 by reaction with nitrogen-containing compounds, e.g. by nitration
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