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CPC Subgroup
C07C 67/343

by increase in the number of carbon atoms

Full Title

Preparation of carboxylic acid esters > by modifying the acid moiety of the ester, such modification not being an introduction of an ester group > by isomerisation; by change of size of the carbon skeleton (introduction or elimination of carboxyl groups C07C67/313, C07C67/32) > by increase in the number of carbon atoms

1 direct subcode

Child Classifications

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  • C07C 67/347 by addition to unsaturated carbon-to-carbon bonds

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