IPC Subgroup
C08K 5/5333 Esters of phosphonic acids
Introduced: January 1990
Last revised: January 2006
Full Title
Use of organic ingredients > Phosphorus-containing compounds > Phosphorus bound to oxygen > bound to oxygen and to carbon only > Phosphonic compounds, e.g. R—P(:O)(OR') > Esters of phosphonic acids
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- Subclass:
- USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
4 direct subcodes
Child Classifications
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- C08K 5/5337 containing also halogens
- C08K 5/5353 containing also nitrogen
- C08K 5/5357 cyclic
- C08K 5/5373 containing heterocyclic rings not representing cyclic esters of phosphonic acids
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