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PCE
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DIFF Subgroup
C07D 311/46

unsubstituted in the carbocyclic ring

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings > ortho- or peri-condensed with carbocyclic rings or ring systems > Benzo [b] pyrans, not hydrogenated in the carbocyclic ring > with oxygen or sulfur atoms in positions 2 and 4 > with one hydrogen atom in position 3 > unsubstituted in the carbocyclic ring

CPC:

Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings > ortho- or peri-condensed with carbocyclic rings or ring systems > Benzo[b]pyrans, not hydrogenated in the carbocyclic ring > with oxygen or sulfur atoms in positions 2 and 4 > with one hydrogen atom in position 3 > unsubstituted in the carbocyclic ring

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

IPC defines codes here since 1974.

Child Classifications

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  • C07D 311/48 with two such benzopyran radicals linked together by a carbon chain since 1974 IPC+CPC Available in IPC and CPC
  • C07D 311/50 with elements other than carbon and hydrogen in position 3 since 1974 IPC+CPC Available in IPC and CPC
  • C07D 311/52 Enol-esters or -ethers, or sulfur analogues thereof since 1974 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