CPC Subgroup
C07C 309/01 Sulfonic acids
Full Title
Sulfonic acids; Halides, esters, or anhydrides thereof > Sulfonic acids
4 direct subcodes
Child Classifications
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- C07C 309/02 having sulfo groups bound to acyclic carbon atoms
- C07C 309/25 having sulfo groups bound to carbon atoms of rings other than six-membered aromatic rings of a carbon skeleton
- C07C 309/28 having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
- C07C 309/62 Sulfonated fats, oils or waxes of undetermined constitution
Top Applicants
Top 10 applicants by patent filingsfor class C07, 2013–2023, worldwide · Source: EPO PATSTAT
- ROCHE CH 12,683
- NOVARTIS CH 10,775
- CHINESE ACADEMY OF SCIENCES 10,619
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 9,511
- REGENERON PHARMACEUTICALS US 8,426
- BRISTOL-MYERS SQUIBB COMPANY US 7,979
- LG CHEM KR 7,978
- HARVARD UNIVERSITY US 7,706
- UNIVERSITY OF CALIFORNIA US 7,455
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 7,219