IPC Subgroup
A61K 31/66 Phosphorus compounds
Introduced: July 1974
Last revised: January 2006
Full Title
Medicinal preparations containing organic active ingredients > Phosphorus compounds
Classification Context
- Section:
- HUMAN NECESSITIES
- Class:
- MEDICAL OR VETERINARY SCIENCE; HYGIENE
- Subclass:
- PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
7 direct subcodes
Child Classifications
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- A61K 31/661 Phosphorus acids or esters thereof not having P—C bonds, e.g. fosfosal, dichlorvos, malathion
- A61K 31/662 Phosphorus acids or esters thereof having P—C bonds, e.g. foscarnet, trichlorfon
- A61K 31/664 Amides of phosphorus acids
- A61K 31/665 having oxygen as a ring hetero atom, e.g. fosfomycin
- A61K 31/67 having sulfur as a ring hetero atom
- A61K 31/675 having nitrogen as a ring hetero atom, e.g. pyridoxal phosphate
- A61K 31/683 Diesters of a phosphorus acid with two hydroxy compounds, e.g. phosphatidylinositols
Top Applicants
Top 10 applicants by patent filingsfor 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