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CPC Subgroup
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

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 31/455 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

  1. PHILIPS ELECTRONICS NL 20,621
  2. NOVARTIS CH 15,792
  3. ROCHE CH 14,303
  4. COVIDIEN US 13,862
  5. HARVARD UNIVERSITY US 13,454
  6. UNIVERSITY OF CALIFORNIA US 12,798
  7. P&G (PROCTER & GAMBLE COMPANY) US 12,140
  8. L'OREAL FR 11,800
  9. OLYMPUS CORPORATION JP 9,894
  10. BOSTON SCIENTIFIC SCIMED US 9,513