DIFF Main Group
C07C 67/00 Preparation of carboxylic acid esters
Introduced: September 1968
IPC and CPC are identically structured here. All 22 subcodes exist in both systems.
4 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C07C 67/03 by reacting an ester group with a hydroxy group since 1974 IPC+CPC Available in IPC and CPC
- C07C 67/035 by reacting carboxylic acids or symmetrical anhydrides with saturated hydrocarbons since 1980 IPC+CPC Available in IPC and CPC
- C07C 67/04 by reacting carboxylic acids or symmetrical anhydrides onto unsaturated carbon-to-carbon bonds IPC+CPC Available in IPC and CPC
- C07C 67/08 by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds since 1974 IPC+CPC Available in IPC and CPC
- C07C 67/10 by reacting carboxylic acids or symmetrical anhydrides with ester groups or with a carbon-halogen bond (preparation from carboxylic acid halides C07C67/14) since 1974 IPC+CPC Available in IPC and CPC
- C07C 67/16 from carboxylic acids, esters or anhydrides wherein one oxygen atom has been replaced by a sulfur, selenium or tellurium atom since 1974 IPC+CPC Available in IPC and CPC
- C07C 67/18 by conversion of a group containing nitrogen into an ester group since 1974 IPC+CPC Available in IPC and CPC
- C07C 67/24 by reacting carboxylic acids or derivatives thereof with a carbon-to-oxygen ether bond, e.g. acetal, tetrahydrofuran since 1974 IPC+CPC Available in IPC and CPC
- C07C 67/28 by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group since 1974 IPC+CPC Available in IPC and CPC
- C07C 67/30 by modifying the acid moiety of the ester, such modification not being an introduction of an ester group since 1974 IPC+CPC Available in IPC and CPC
- C07C 67/36 by reaction with carbon monoxide or formates (C07C67/02, C07C67/03, C07C67/10 take precedence) since 1974 IPC+CPC Available in IPC and CPC
- C07C 67/39 by oxidation of groups which are precursors for the acid moiety of the ester since 1980 IPC+CPC Available in IPC and CPC
- C07C 67/44 by oxidation-reduction of aldehydes, e.g. Tishchenko reaction since 1974 IPC+CPC Available in IPC and CPC
- C07C 67/47 by telomerisation (macromolecular compounds C08) since 1980 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
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