Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
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

Navigate with arrow keys, Enter to open

  • C07C 67/02 by interreacting ester groups, i.e. transesterification IPC+CPC Available in IPC and CPC
  • 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 67/08 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 67/12 from asymmetrical anhydrides since 1974 IPC+CPC Available in IPC and CPC
  • C07C 67/14 from carboxylic acid halides 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  • C07C 67/16 from carboxylic acids, esters or anhydrides wherein one oxygen atom has been replaced by a sulfur, selenium or tellurium atom since 1974 IPC+CPC Available in IPC and CPC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 67/27 from ortho-esters 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 67/46 from ketenes or polyketenes since 1974 IPC+CPC Available in IPC and CPC
  • C07C 67/465 by oligomerisation since 1980 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

  1. CHINESE ACADEMY OF SCIENCES 12,697
  2. ROCHE CH 11,347
  3. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 11,024
  4. NOVARTIS CH 9,356
  5. BASF (BADISCHE ANILIN & SODA FABRIK) DE 8,531
  6. BRISTOL-MYERS SQUIBB COMPANY US 7,320
  7. LG CHEM KR 7,245
  8. REGENERON PHARMACEUTICALS US 6,816
  9. HARVARD UNIVERSITY US 6,190
  10. GENENTECH US 5,922

Top Applicants (CPC)

Class C07,2013–2023, worldwide · Source: EPO PATSTAT

  1. ROCHE CH 12,683
  2. NOVARTIS CH 10,775
  3. CHINESE ACADEMY OF SCIENCES 10,619
  4. BASF (BADISCHE ANILIN & SODA FABRIK) DE 9,511
  5. REGENERON PHARMACEUTICALS US 8,426
  6. BRISTOL-MYERS SQUIBB COMPANY US 7,979
  7. LG CHEM KR 7,978
  8. HARVARD UNIVERSITY US 7,706
  9. UNIVERSITY OF CALIFORNIA US 7,455
  10. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 7,219