CPC Subgroup
C07C 67/333 by isomerisation; by change of size of the carbon skeleton (introduction or elimination of carboxyl groups C07C67/313, C07C67/32)
Full Title
Preparation of carboxylic acid esters > by modifying the acid moiety of the ester, such modification not being an introduction of an ester group > by isomerisation; by change of size of the carbon skeleton (introduction or elimination of carboxyl groups C07C67/313, C07C67/32)
2 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- C07C 67/34 Migration of [IMAGE cpc-sch-C07C-0962.gif] groups in the molecule
- C07C 67/343 by increase in the number of carbon atoms
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