A61K 31/435 having six-membered rings with one nitrogen as the only ring hetero atom
Introduced: July 1974
Last revised: January 2006
Full Title
Medicinal preparations containing organic active ingredients > Heterocyclic compounds > having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins > having six-membered rings with one nitrogen as the only ring hetero atom
Classification Context
- Section:
- HUMAN NECESSITIES
- Class:
- MEDICAL OR VETERINARY SCIENCE; HYGIENE
- Subclass:
- PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
Filing statistics
IPC A61K 31/435 belongs to the parent subclass A61K, which recorded 1,792,627 patent applications worldwide between 2013 and 2023. Annual filings declined from 147,606 in 2013 to 132,650 in 2023 (-10%), peaking at 177,518 applications in 2016. The most active applicants in class A61 are PHILIPS ELECTRONICS (18,523 applications), NOVARTIS (14,253 applications) and COVIDIEN (13,953 applications).
Source: EPO PATSTAT, worldwide filings
7 direct subcodes
Child Classifications
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- A61K 31/4353 ortho- or peri-condensed with heterocyclic ring systems
- A61K 31/438 the ring being spiro-condensed with carbocyclic or heterocyclic ring systems
- A61K 31/439 the ring forming part of a bridged ring system, e.g. quinuclidine
- A61K 31/44 Non-condensed pyridines; Hydrogenated derivatives thereof
- A61K 31/46 8-Azabicyclo [3.2.1] octane; Derivatives thereof, e.g. atropine, cocaine
- A61K 31/465 Nicotine; Derivatives thereof
- A61K 31/47 Quinolines; Isoquinolines
Top Applicants
Top 10 applicants by patent filingsfor class A61, 2013–2023, worldwide · Source: EPO PATSTAT
- PHILIPS ELECTRONICS NL 18,523
- NOVARTIS CH 14,253
- COVIDIEN US 13,953
- ROCHE CH 12,005
- CHINESE ACADEMY OF SCIENCES 11,955
- UNIVERSITY OF CALIFORNIA US 11,692
- HARVARD UNIVERSITY US 11,596
- L'OREAL FR 11,593
- P&G (PROCTER & GAMBLE COMPANY) US 11,297
- OLYMPUS CORPORATION JP 9,594