Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
CPC Subgroup
C08L 33/18

Homopolymers or copolymers of nitriles

Full Title

Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers > Homopolymers or copolymers of nitriles

2 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • C08L 33/20 Homopolymers or copolymers of acrylonitrile (C08L55/02 takes precedence)
  • C08L 33/22 Homopolymers or copolymers of nitriles containing four or more carbon atoms

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