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IPC Subgroup
C07D 411/02

containing two hetero rings

Introduced: July 1974

Last revised: January 2006

Full Title

Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen and sulfur atoms as the only ring hetero atoms > containing two hetero rings

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
ORGANIC CHEMISTRY
Subclass:
HETEROCYCLIC COMPOUNDS

5 direct subcodes

Child Classifications

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  • C07D 411/04 directly linked by a ring-member-to-ring- member bond
  • C07D 411/06 linked by a carbon chain containing only aliphatic carbon atoms
  • C07D 411/08 linked by a carbon chain containing alicyclic rings
  • C07D 411/1 linked by a carbon chain containing aromatic rings
  • C07D 411/12 linked by a chain containing hetero atoms as chain links

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