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PCE
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DIFF Subgroup
A61K 31/44

Non condensed pyridines; Hydrogenated derivatives thereof

Introduced: July 1974

Title

Titles differ between systems:

IPC: Non-condensed pyridines; Hydrogenated derivatives thereof

CPC: Non condensed pyridines; Hydrogenated derivatives thereof

Full Title

Full titles differ between systems:

IPC:

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

CPC:

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

IPC and CPC are identically structured here. All 11 subcodes exist in both systems.

5 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1974.

Child Classifications

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  • A61K 31/4402 only substituted in position 2, e.g. pheniramine, bisacodyl since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4406 only substituted in position 3, e.g. zimeldine (nicotinic acid A61K31/455) since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4409 only substituted in position 4, e.g. isoniazid, iproniazid since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4412 having oxo groups directly attached to the heterocyclic ring since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4415 Pyridoxine, i.e. Vitamin B6 (pyridoxal phosphate A61K31/675) since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4418 having a carbocyclic group directly attached to the heterocyclic ring, e.g. cyproheptadine since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4422 1,4-Dihydropyridines, e.g. nifedipine, nicardipine since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4425 Pyridinium derivatives, e.g. pralidoxime, pyridostigmine since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/455 Nicotinic acids, e.g. niacin; Derivatives thereof, e.g. esters, amides since 1974 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

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