A61K 31/352 condensed with carbocyclic rings, e.g. methantheline
Introduced: January 2000
Title
Titles differ between systems:
IPC: condensed with carbocyclic rings, e.g. cannabinols, methantheline
CPC: condensed with carbocyclic rings, e.g. methantheline
Full Title
Full titles differ between systems:
Medicinal preparations containing organic active ingredients > Heterocyclic compounds > having oxygen as the only ring hetero atom, e.g. fungichromin > having six-membered rings with one oxygen as the only ring hetero atom > condensed with carbocyclic rings, e.g. cannabinols, methantheline
Medicinal preparations containing organic active ingredients > Heterocyclic compounds > having oxygen as the only ring hetero atom, e.g. fungichromin > having six-membered rings with one oxygen as the only ring hetero atom > condensed with carbocyclic rings, e.g. methantheline
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 2000.
Child Classifications
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- A61K 31/353 3,4-Dihydrobenzopyrans, e.g. chroman, catechin since 2000 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class A61,2013–2023, worldwide · Source: EPO PATSTAT
- PHILIPS ELECTRONICS NL 18,523
- NOVARTIS CH 14,253
- COVIDIEN US 13,953
- ROCHE CH 12,005
- CHINESE ACADEMY OF SCIENCES 11,955
- UNIVERSITY OF CALIFORNIA US 11,692
- HARVARD UNIVERSITY US 11,596
- L'OREAL FR 11,593
- P&G (PROCTER & GAMBLE COMPANY) US 11,297
- OLYMPUS CORPORATION JP 9,594
Top Applicants (CPC)
Class A61,2013–2023, worldwide · Source: EPO PATSTAT
- PHILIPS ELECTRONICS NL 20,621
- NOVARTIS CH 15,792
- ROCHE CH 14,303
- COVIDIEN US 13,862
- HARVARD UNIVERSITY US 13,454
- UNIVERSITY OF CALIFORNIA US 12,798
- P&G (PROCTER & GAMBLE COMPANY) US 12,140
- L'OREAL FR 11,800
- OLYMPUS CORPORATION JP 9,894
- BOSTON SCIENTIFIC SCIMED US 9,513