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CPC Subgroup
C07C 67/28

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

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

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. 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