DIFF Subgroup
C07C 251/72 Hydrazones
Introduced: January 1990
Full Title
Full titles differ between systems:
IPC:
Compounds containing nitrogen atoms doubly- bound to a carbon skeleton > Hydrazones
CPC:
Compounds containing nitrogen atoms doubly-bound to a carbon skeleton (diazo compounds C07C245/12) > Hydrazones
IPC and CPC are identically structured here. All 5 subcodes exist in both systems.
IPC defines codes here since 1990.
Child Classifications
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- C07C 251/74 having doubly-bound carbon atoms of hydrazone groups bound to hydrogen atoms or to acyclic carbon atoms since 1990 IPC+CPC Available in IPC and CPC
- C07C 251/82 having doubly-bound carbon atoms of hydrazone groups bound to carbon atoms of rings other than six-membered aromatic rings since 1990 IPC+CPC Available in IPC and CPC
- C07C 251/84 having doubly-bound carbon atoms of hydrazone groups being part of rings other than six-membered aromatic rings since 1990 IPC+CPC Available in IPC and CPC
- C07C 251/86 having doubly-bound carbon atoms of hydrazone groups bound to carbon atoms of six-membered aromatic rings since 1990 IPC+CPC Available in IPC and CPC
- C07C 251/88 having also the other nitrogen atom doubly-bound to a carbon atom, e.g. azines since 1990 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