CPC Subgroup
A61K 31/558 having heterocyclic rings containing oxygen as the only ring hetero atom, e.g. thromboxanes
Full Title
Medicinal preparations containing organic active ingredients > Eicosanoids, e.g. leukotrienes > having heterocyclic rings containing oxygen as the only ring hetero atom, e.g. thromboxanes
1 direct subcode
Child Classifications
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- A61K 31/5585 having five-membered rings containing oxygen as the only ring hetero atom, e.g. prostacyclin
Top Applicants
Top 10 applicants by patent filingsfor 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