IPC Main Group
C09K 23/00 Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
Introduced: January 2022
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- Subclass:
- MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
Filing statistics
IPC C09K 23/00 belongs to the parent subclass C09K, which recorded 265,496 patent applications worldwide between 2013 and 2023. Annual filings grew from 22,189 in 2013 to 22,283 in 2023 (+0%), peaking at 26,558 applications in 2018. The most active applicants in class C09 are LG CHEM (6,420 applications), NITTO DENKO CORPORATION (5,752 applications) and HALLIBURTON ENERGY SERVICES GROUP (5,650 applications).
Source: EPO PATSTAT, worldwide filings
Related Keywords
DISPERSING -agentsEMULSIFYING -agents
23 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
- 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 23/1 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 23/2 Phosphonium and sulfonium compounds
- C09K 23/22 Amides or hydrazides
- C09K 23/26 Sulfonamides
- C09K 23/28 Aminocarboxylic acids
- C09K 23/3 Proteins; Protein hydrolysates
- C09K 23/32 Heterocyclic compounds
- C09K 23/34 Higher-molecular-weight carboxylic acid esters
- C09K 23/38 Alcohols, e.g. oxidation products of paraffins
- C09K 23/4 Phenols
- C09K 23/42 Ethers, e.g. polyglycol ethers of alcohols or phenols
- C09K 23/5 Derivatives of lignin
Top Applicants
Top 10 applicants by patent filingsfor class C09, 2013–2023, worldwide · Source: EPO PATSTAT
- LG CHEM KR 6,420
- NITTO DENKO CORPORATION JP 5,752
- HALLIBURTON ENERGY SERVICES GROUP US 5,650
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 5,635
- DOW GLOBAL TECHNOLOGIES US 4,844
- MERCK PATENT DE 4,779
- CHINESE ACADEMY OF SCIENCES 4,311
- FUJIFILM JP 4,205
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 4,039
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,931