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CPC Subgroup
A61K 31/568

substituted in positions 10 and 13 by a chain having at least one carbon atom, e.g. androstanes, e.g. testosterone

Full Title

Medicinal preparations containing organic active ingredients > Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids > not substituted in position 17 beta by a carbon atom, e.g. estrane, estradiol > substituted in positions 10 and 13 by a chain having at least one carbon atom, e.g. androstanes, e.g. testosterone

2 direct subcodes

Child Classifications

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  • A61K 31/5685 having an oxo group in position 17, e.g. androsterone
  • A61K 31/569 substituted in position 17 alpha, e.g. ethisterone

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