DIFF Subgroup
A61K 31/135 having aromatic rings
Introduced: July 1974
Title
Titles differ between systems:
IPC: having aromatic rings, e.g. methadone
CPC: having aromatic rings
Full Title
Full titles differ between systems:
IPC:
Medicinal preparations containing organic active ingredients > Amines, e.g. amantadine > having aromatic rings, e.g. methadone
CPC:
Medicinal preparations containing organic active ingredients > Amines > having aromatic rings
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 2000.
Child Classifications
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- A61K 31/136 having the amino group directly attached to the aromatic ring, e.g. benzeneamine since 2000 IPC+CPC Available in IPC and CPC
- A61K 31/137 Arylalkylamines, e.g. amphetamine, epinephrine, salbutamol, ephedrine since 2000 IPC+CPC Available in IPC and CPC
- A61K 31/138 Aryloxyalkylamines, e.g. propranolol, tamoxifen, phenoxybenzamine (atenolol A61K31/165; pindolol A61K31/404; timolol A61K31/5377) 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