IPC Subgroup
C07D 491/14 Ortho-condensed systems
Introduced: July 1974
Last revised: January 2006
Full Title
Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups , , or > in which the condensed system contains three hetero rings > Ortho-condensed systems
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ORGANIC CHEMISTRY
- Subclass:
- HETEROCYCLIC COMPOUNDS
2 direct subcodes
Child Classifications
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- C07D 491/147 the condensed system containing one ring with oxygen as ring hetero atom and two rings with nitrogen as ring hetero atom
- C07D 491/153 the condensed system containing two rings with oxygen as ring hetero atom and one ring with nitrogen as ring hetero atom
Top Applicants
Top 10 applicants by patent filingsfor class C07, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 12,697
- ROCHE CH 11,347
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 11,024
- NOVARTIS CH 9,356
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 8,531
- BRISTOL-MYERS SQUIBB COMPANY US 7,320
- LG CHEM KR 7,245
- REGENERON PHARMACEUTICALS US 6,816
- HARVARD UNIVERSITY US 6,190
- GENENTECH US 5,922