CPC Subgroup
C07C 51/42 Separation; Purification; Stabilisation; Use of additives
Full Title
Preparation of carboxylic acids or their salts, halides or anhydrides (of acids by hydrolysis of oils, fats or waxes C11C) > Separation; Purification; Stabilisation; Use of additives
5 direct subcodes
Child Classifications
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- C07C 51/43 by change of the physical state, e.g. crystallisation
- C07C 51/47 by solid-liquid treatment; by chemisorption
- C07C 51/48 by liquid-liquid treatment
- C07C 51/487 by treatment giving rise to chemical modification (by chemisorption C07C51/47)
- C07C 51/50 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