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IPC Subgroup
A61K 31/44

Non-condensed pyridines; Hydrogenated derivatives thereof

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 > Non-condensed pyridines; Hydrogenated derivatives thereof

Classification Context

Section:
HUMAN NECESSITIES
Class:
MEDICAL OR VETERINARY SCIENCE; HYGIENE
Subclass:
PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES

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
  • 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 B
  • A61K 31/4418 having a carbocyclic ring 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 31/455 Nicotinic acid, i.e. niacin; Derivatives thereof, e.g. esters, amides

Top Applicants

Top 10 applicants by patent filingsfor class A61, 2013–2023, worldwide · Source: EPO PATSTAT

  1. PHILIPS ELECTRONICS NL 18,523
  2. NOVARTIS CH 14,253
  3. COVIDIEN US 13,953
  4. ROCHE CH 12,005
  5. CHINESE ACADEMY OF SCIENCES 11,955
  6. UNIVERSITY OF CALIFORNIA US 11,692
  7. HARVARD UNIVERSITY US 11,596
  8. L'OREAL FR 11,593
  9. P&G (PROCTER & GAMBLE COMPANY) US 11,297
  10. OLYMPUS CORPORATION JP 9,594