Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
CPC Main Group
C09K 23/00

Use of substances as emulsifying, wetting, dispersing, or foam-producing agents

28 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • C09K 23/02 Alkyl sulfonates or sulfuric acid ester salts derived from monohydric alcohols
  • C09K 23/04 Sulfonates or sulfuric acid ester salts derived from polyhydric alcohols or amino alcohols or derivatives thereof (sulfated or sulfonated fatty oils C09K23/08)
  • C09K 23/06 Esters of higher fatty acids with hydroxyalkylated sulfonic acids or salts thereof
  • C09K 23/08 Sulfation or sulfonation products of fats, oils, waxes, or higher fatty acids or esters thereof with monovalent alcohols
  • C09K 23/10 Derivatives of low-molecular-weight sulfocarboxylic acids or sulfopolycarboxylic acids
  • C09K 23/12 Sulfonates of aromatic or alkylated aromatic compounds
  • C09K 23/14 Derivatives of phosphoric acid
  • C09K 23/16 Amines or polyamines
  • C09K 23/18 Quaternary ammonium compounds
  • C09K 23/20 Phosphonium and sulfonium compounds
  • C09K 23/26 Sulfonamides
  • C09K 23/28 Aminocarboxylic acids (proteins and protein hydrolysates C09K23/30)
  • C09K 23/30 Proteins; Protein hydrolysates
  • C09K 23/32 Heterocyclic compounds

Top Applicants

Top 10 applicants by patent filingsfor class C09, 2013–2023, worldwide · Source: EPO PATSTAT

  1. LG CHEM KR 7,954
  2. HALLIBURTON ENERGY SERVICES GROUP US 6,584
  3. NITTO DENKO CORPORATION JP 6,500
  4. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,490
  5. DOW GLOBAL TECHNOLOGIES US 6,324
  6. FUJIFILM JP 5,832
  7. MERCK PATENT DE 5,481
  8. BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,147
  9. SAMSUNG DISPLAY KR 5,105
  10. NITTO DENKO CORPORATION 3,584