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DIFF Subgroup
A61K 31/4164

1,3-Diazoles

Introduced: January 2000

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 five-membered rings with two or more ring hetero atoms, at least one of which is nitrogen, e.g. tetrazole > 1,3-Diazoles

CPC:

Medicinal preparations containing organic active ingredients > Heterocyclic compounds > having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins > having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole > 1,3-Diazoles

IPC and CPC are identically structured here. All 8 subcodes exist in both systems.

3 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2000.

Child Classifications

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  • A61K 31/4166 having oxo groups directly attached to the heterocyclic ring, e.g. phenytoin since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4168 having a nitrogen attached in position 2, e.g. clonidine since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/417 Imidazole-alkylamines, e.g. histamine, phentolamine since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4172 Imidazole-alkanecarboxylic acids, e.g. histidine since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4174 Arylalkylimidazoles, e.g. oxymetazolin, naphazoline, miconazole since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4178 not condensed 1,3-diazoles and containing further heterocyclic rings, e.g. pilocarpine, nitrofurantoin since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4184 condensed with carbocyclic rings, e.g. benzimidazoles since 2000 IPC+CPC Available in IPC and CPC
  • A61K 31/4188 condensed with other heterocyclic ring systems, e.g. biotin, sorbinil since 2000 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