Inhibitors of testosterone 5.alpha.-reductase activity
CA 2136304 A1 · Owner: Merand, Yves M. · Inventors: Merand, Yves M.; Singh, Shankar M.; Labrie, Fernand
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Inhibitors of testosterone 5.alpha.-reductase activity for example those of formula (I) wherein novel substituents are provided at the R4, R6, R7, R17.alpha. and/or R17.beta. positions are useful for the treatment of diseases whose progress is aided by activation of androgen receptors. e.g. prostate cancer benign prostatic hyperplasia, acne, seborrhea hirsutism, androgenic alopecia and the like.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed May 6, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.