IPC Subgroup
C07C 67/48 Separation; Purification; Stabilisation; Use of additives
Introduced: July 1974
Last revised: January 2006
Full Title
Preparation of carboxylic acid esters > Separation; Purification; Stabilisation; Use of additives
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ORGANIC CHEMISTRY
- Subclass:
- ACYCLIC OR CARBOCYCLIC COMPOUNDS
5 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- 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 67/6 by treatment giving rise to chemical modification
- 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
- 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