A61K 31/44 Non condensed pyridines; Hydrogenated derivatives thereof
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 > Non condensed pyridines; Hydrogenated derivatives thereof
Filing statistics
CPC A61K 31/44 belongs to the parent subclass A61K, which recorded 1,717,491 patent applications worldwide between 2013 and 2023. Annual filings grew from 114,681 in 2013 to 125,843 in 2023 (+10%), peaking at 182,901 applications in 2016. The most active applicants in class A61 are PHILIPS ELECTRONICS (20,621 applications), NOVARTIS (15,792 applications) and ROCHE (14,303 applications).
Source: EPO PATSTAT, worldwide filings
11 direct subcodes
Child Classifications
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- A61K 31/4402 only substituted in position 2, e.g. pheniramine, bisacodyl
- A61K 31/4406 only substituted in position 3, e.g. zimeldine (nicotinic acid A61K31/455)
- A61K 31/4409 only substituted in position 4, e.g. isoniazid, iproniazid
- A61K 31/4412 having oxo groups directly attached to the heterocyclic ring
- A61K 31/4415 Pyridoxine, i.e. Vitamin B6 (pyridoxal phosphate A61K31/675)
- A61K 31/4418 having a carbocyclic group directly attached to the heterocyclic ring, e.g. cyproheptadine
- A61K 31/4422 1,4-Dihydropyridines, e.g. nifedipine, nicardipine
- A61K 31/4425 Pyridinium derivatives, e.g. pralidoxime, pyridostigmine
- A61K 31/4427 containing further heterocyclic ring systems
- A61K 31/445 Non condensed piperidines, e.g. piperocaine
- A61K 31/455 Nicotinic acids, e.g. niacin; Derivatives thereof, e.g. esters, amides
Top Applicants
Top 10 applicants by patent filingsfor class A61, 2013–2023, worldwide · Source: EPO PATSTAT
- PHILIPS ELECTRONICS NL 20,621
- NOVARTIS CH 15,792
- ROCHE CH 14,303
- COVIDIEN US 13,862
- HARVARD UNIVERSITY US 13,454
- UNIVERSITY OF CALIFORNIA US 12,798
- P&G (PROCTER & GAMBLE COMPANY) US 12,140
- L'OREAL FR 11,800
- OLYMPUS CORPORATION JP 9,894
- BOSTON SCIENTIFIC SCIMED US 9,513