CPC Subgroup
C08K 5/52 Phosphorus bound to oxygen only
Full Title
Use of organic ingredients > Phosphorus-containing compounds > Phosphorus bound to oxygen > Phosphorus bound to oxygen only
5 direct subcodes
Child Classifications
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- C08K 5/521 Esters of phosphoric acids, e.g. of H3PO4
- C08K 5/524 Esters of phosphorous acids, e.g. of H3PO3
- C08K 5/527 Cyclic esters
- C08K 5/529 Esters containing heterocyclic rings not representing cyclic esters of phosphoric or phosphorous acids
Top Applicants
Top 10 applicants by patent filingsfor class C08, 2013–2023, worldwide · Source: EPO PATSTAT
- LG CHEM KR 15,432
- DOW GLOBAL TECHNOLOGIES US 14,214
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 11,155
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,455
- FUJIFILM JP 6,178
- CHINESE ACADEMY OF SCIENCES 5,569
- SHIN-ETSU CHEMICAL COMPANY JP 5,506
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 5,443
- TORAY INDUSTRIES JP 4,635
- NITTO DENKO CORPORATION JP 4,620