CPC Subgroup
C07C 67/48 Separation; Purification; Stabilisation; Use of additives
Full Title
Preparation of carboxylic acid esters > Separation; Purification; Stabilisation; Use of additives
5 direct subcodes
Child Classifications
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- C07C 67/52 by change in the physical state, e.g. crystallisation
- C07C 67/56 by solid-liquid treatment; by chemisorption
- C07C 67/58 by liquid-liquid treatment
- C07C 67/60 by treatment giving rise to chemical modification (by chemisorption C07C67/56)
- C07C 67/62 Use of additives, e.g. for stabilisation
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