CPC Main Group
C09K 23/00 Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
28 direct subcodes
Child Classifications
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- 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 23/22 Amides or hydrazides
- 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
- LG CHEM KR 7,954
- HALLIBURTON ENERGY SERVICES GROUP US 6,584
- NITTO DENKO CORPORATION JP 6,500
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,490
- DOW GLOBAL TECHNOLOGIES US 6,324
- FUJIFILM JP 5,832
- MERCK PATENT DE 5,481
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,147
- SAMSUNG DISPLAY KR 5,105
- NITTO DENKO CORPORATION 3,584