CPC Main Group
C07C 303/00 Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
7 direct subcodes
Child Classifications
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- C07C 303/02 of sulfonic acids or halides thereof
- C07C 303/24 of esters of sulfuric acids
- C07C 303/26 of esters of sulfonic acids
- C07C 303/32 of salts of sulfonic acids
- C07C 303/34 of amides of sulfuric acids
- C07C 303/36 of amides of sulfonic acids
- C07C 303/42 Separation; Purification; Stabilisation; Use of additives
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