DIFF Subgroup
C07D 271/02 not condensed with other rings
Introduced: July 1974
Full Title
Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms > not condensed with other rings
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
IPC defines codes here since 1974.
Child Classifications
Navigate with arrow keys, Enter to open
- C07D 271/04 1,2,3-Oxadiazoles; Hydrogenated 1,2,3-oxadiazoles since 1974 IPC+CPC Available in IPC and CPC
- C07D 271/06 1,2,4-Oxadiazoles; Hydrogenated 1,2,4-oxadiazoles since 1974 IPC+CPC Available in IPC and CPC
- C07D 271/08 1,2,5-Oxadiazoles; Hydrogenated 1,2,5-oxadiazoles since 1974 IPC+CPC Available in IPC and CPC
- C07D 271/10 1,3,4-Oxadiazoles; Hydrogenated 1,3,4-oxadiazoles since 1974 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
Class C07,2013–2023, worldwide · Source: EPO PATSTAT
- ROCHE CH 12,683
- NOVARTIS CH 10,775
- CHINESE ACADEMY OF SCIENCES 10,619
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 9,511
- REGENERON PHARMACEUTICALS US 8,426
- BRISTOL-MYERS SQUIBB COMPANY US 7,979
- LG CHEM KR 7,978
- HARVARD UNIVERSITY US 7,706
- UNIVERSITY OF CALIFORNIA US 7,455
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 7,219