Medicinal preparations containing organic active ingredients

Introduced: July 1974

Of 31 combined children, 30 exist in both systems.

1 codes are CPC-only extensions.

9 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1974.

Child Classifications

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A61K 31/01 Hydrocarbons since 1974 IPC+CPC Available in IPC and CPC
A61K 31/02 Halogenated hydrocarbons since 1974 IPC+CPC Available in IPC and CPC
A61K 31/04 Nitro compounds since 1974 IPC+CPC Available in IPC and CPC
A61K 31/045 Hydroxy compounds, e.g. alcohols; Salts thereof, e.g. alcoholates since 1974 IPC+CPC Available in IPC and CPC
A61K 31/075 Ethers or acetals since 1974 IPC+CPC Available in IPC and CPC
A61K 31/095 Sulfur, selenium, or tellurium compounds, e.g. thiols since 1974 IPC+CPC Available in IPC and CPC
A61K 31/11 Aldehydes since 1974 IPC+CPC Available in IPC and CPC
A61K 31/12 Ketones since 1974 IPC+CPC Available in IPC and CPC
A61K 31/13 Amines since 1974 IPC+CPC Available in IPC and CPC
A61K 31/16 Amides, e.g. hydroxamic acids since 1974 IPC+CPC Available in IPC and CPC
A61K 31/185 Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids (hydroxamic acids A61K31/16; peroxy acids A61K31/327) since 1974 IPC+CPC Available in IPC and CPC
A61K 31/21 Esters, e.g. nitroglycerine, selenocyanates since 1974 IPC+CPC Available in IPC and CPC
A61K 31/275 Nitriles; Isonitriles since 1974 IPC+CPC Available in IPC and CPC
A61K 31/28 Compounds containing heavy metals since 1974 IPC+CPC Available in IPC and CPC
A61K 31/325 Carbamic acids; Thiocarbamic acids; Anhydrides or salts thereof (thiurams A61K31/145) since 1974 IPC+CPC Available in IPC and CPC
A61K 31/327 Peroxy compounds, e.g. hydroperoxides, peroxides, peroxyacids since 2000 IPC+CPC Available in IPC and CPC
A61K 31/33 Heterocyclic compounds since 1974 IPC+CPC Available in IPC and CPC
A61K 31/557 Eicosanoids, e.g. leukotrienes since 1980 IPC+CPC Available in IPC and CPC
A61K 31/56 Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids since 1974 IPC+CPC Available in IPC and CPC
A61K 31/59 Compounds containing 9, 10- seco- cyclopenta[a]hydrophenanthrene ring systems since 1974 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