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CPC Subgroup
A61K 31/435

having six-membered rings with one nitrogen as the only ring hetero atom

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

7 direct subcodes

Child Classifications

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  • 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 (8-azabicyclo [3.2.1] octanes A61K31/46)
  • A61K 31/46 8-Azabicyclo [3.2.1] octane; Derivatives thereof, e.g. atropine, cocaine
  • A61K 31/465 Nicotine; Derivatives thereof

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