Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
CPC Subgroup
A61K 31/54

having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame

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 at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame

6 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • A61K 31/541 Non-condensed thiazines containing further heterocyclic rings
  • A61K 31/5415 ortho- or peri-condensed with carbocyclic ring systems, e.g. phenothiazine, chlorpromazine, piroxicam
  • A61K 31/547 spiro-condensed or forming part of bridged ring systems
  • A61K 31/548 having two or more sulfur atoms in the same ring
  • A61K 31/549 having two or more nitrogen atoms in the same ring, e.g. hydrochlorothiazide

Top Applicants

Top 10 applicants by patent filingsfor class A61, 2013–2023, worldwide · Source: EPO PATSTAT

  1. PHILIPS ELECTRONICS NL 20,621
  2. NOVARTIS CH 15,792
  3. ROCHE CH 14,303
  4. COVIDIEN US 13,862
  5. HARVARD UNIVERSITY US 13,454
  6. UNIVERSITY OF CALIFORNIA US 12,798
  7. P&G (PROCTER & GAMBLE COMPANY) US 12,140
  8. L'OREAL FR 11,800
  9. OLYMPUS CORPORATION JP 9,894
  10. BOSTON SCIENTIFIC SCIMED US 9,513