17beta-n-substituted adamantyl/norbornanyl carbamoyl-4-aza-5a -androst -1-en-3-ones and adrostan-3-ones as 5a-reductase inhibitors
CA 2085456 A1 · Owner: Rasmusson, Gary H. · Inventors: Rasmusson, Gary H.; Steinberg, Nathan G.; Patel, Gool F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
90/RJN46, - i - 18052IA, TITLE OF THE INVENTION 17.alpha.-N-SUBSTITUTED ADAMANTYL/NORBORNANYL CARBAMOYL-4-AZA-5.alpha.-ANDROST-1-EN-3-ONES AND ANDROSTAN- 3-ONES AS 5.alpha.-REDUCTASE INHIBITORS ABSTRACT OF THE INVENTION, 17.beta.-N-SUBSTITUTED ADAMANTYL/NORBORNANYL CARBAMOYL-4-AZA-5.alpha.-ANDROST-1-EN-3-ONES AND ANDROSTAN- 3-ONES AS 5.alpha.-REDUCTASE INHIBITORS OF THE FORMULA: 90/RJN46, - ii - 18052IA, wherein R and R1 are independently selected from hydrogen, methyl and ethyl and R2 is a hydrocarbon radical selected from substituted or unsubstituted 1or 2-adamantyl or 1- or 2-norbornanyl and wherein the dotted line represents a double bond which can be present.
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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 December 15, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2014.
- 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.