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IPC Subgroup
C07C 67/28

by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group

Introduced: July 1974

Last revised: January 2006

Full Title

Preparation of carboxylic acid esters > by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
ORGANIC CHEMISTRY
Subclass:
ACYCLIC OR CARBOCYCLIC COMPOUNDS

5 direct subcodes

Child Classifications

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  • C07C 67/283 by hydrogenation of unsaturated carbon-to-carbon bonds
  • C07C 67/287 by introduction of halogen; by substitution of halogen atoms by other halogen atoms
  • C07C 67/29 by introduction of oxygen-containing functional groups
  • C07C 67/293 by isomerisation; by change of size of the carbon skeleton
  • C07C 67/297 by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups

Top Applicants

Top 10 applicants by patent filingsfor 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