IPC Subgroup
C07C 51/42 Separation; Purification; Stabilisation; Use of additives
Introduced: September 1968
Last revised: January 2006
Full Title
Preparation of carboxylic acids or their salts, halides, or anhydrides > Separation; Purification; Stabilisation; Use of additives
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ORGANIC CHEMISTRY
- Subclass:
- ACYCLIC OR CARBOCYCLIC COMPOUNDS
Related Keywords
purification or separation of CARBOXYLIC or salts, halides, anhydrides, derivatives or esters thereof
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
- C07C 51/5 Use of additives, e.g. for stabilisation
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