IPC 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
Introduced: January 1990
Last revised: January 2006
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ORGANIC CHEMISTRY
- Subclass:
- ACYCLIC OR CARBOCYCLIC COMPOUNDS
Related Keywords
AMINO sulfonic acidspreparation of AMINO sulfonic acidsHYDROXY sulfonic acidsorganic SULFATESSULFONATED compoundsSULFONIC acids, esters, halides, anhydrides or amides thereofesters of SULFURIC
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
- CHINESE ACADEMY OF SCIENCES 12,697
- ROCHE CH 11,347
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 11,024
- NOVARTIS CH 9,356
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 8,531
- BRISTOL-MYERS SQUIBB COMPANY US 7,320
- LG CHEM KR 7,245
- REGENERON PHARMACEUTICALS US 6,816
- HARVARD UNIVERSITY US 6,190
- GENENTECH US 5,922