DIFF Subgroup
A61K 31/47 Quinolines; Isoquinolines
Introduced: July 1974
Full Title
Medicinal preparations containing organic active ingredients > Heterocyclic compounds > having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins > having six-membered rings with one nitrogen as the only ring hetero atom > Quinolines; Isoquinolines
IPC and CPC are identically structured here. All 12 subcodes exist in both systems.
3 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1974.
Child Classifications
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- A61K 31/4706 4-Aminoquinolines; 8-Aminoquinolines, e.g. chloroquine, primaquine since 2000 IPC+CPC Available in IPC and CPC
- A61K 31/4709 Non-condensed quinolines and containing further heterocyclic rings since 2000 IPC+CPC Available in IPC and CPC
- A61K 31/472 Non-condensed isoquinolines, e.g. papaverine since 2000 IPC+CPC Available in IPC and CPC
- A61K 31/473 ortho- or peri-condensed with carbocyclic ring systems, e.g. acridines, phenanthridines since 2000 IPC+CPC Available in IPC and CPC
- A61K 31/4738 ortho- or peri-condensed with heterocyclic ring systems since 2000 IPC+CPC Available in IPC and CPC
- A61K 31/4748 forming part of bridged ring systems (strychnine A61K31/475; morphinan derivatives A61K31/485) since 2000 IPC+CPC Available in IPC and CPC
- A61K 31/475 having an indole ring, e.g. yohimbine, reserpine, strychnine, vinblastine (vincamine A61K31/4375) since 1974 IPC+CPC Available in IPC and CPC
- A61K 31/48 Ergoline derivatives, e.g. lysergic acid, ergotamine since 1974 IPC+CPC Available in IPC and CPC
- A61K 31/485 Morphinan derivatives, e.g. morphine, codeine 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