17.beta.-N-MONOSUBSTITUTED-CARBAMOYL-4-AZA-5.alpha.-ANDROSTAN-3-ONES
CA 1284636 C · Owner: Merck & Co. Inc. · Inventors: Vandenheuvel, William J.A.; Rasmusson, Gary H.; Carlin, Josephine R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE OF THE INVENTION, OXIDIZED ANALOGS OF 17B-N-MONOSUBSTITUTED CARBAMOYL-4-AZA-5.alpha.-ANDROSTAN-3-ONES ABSTRACT OF THE INVENTION:, The compounds of formula (I) (I), wherein R is selected from hydrogen methyl or ethyl, and R1 is C1-12 straight or branched chain alkyl wherein one of the hydrogens is substituted by hydroxy, carboxylic acid or C1-4 alkyl ester and A, is -CH2-CH2 or -CH=CH-, and pharmaceutical formulations of the above compounds are active as testosterone 5.alpha.-reductase inhibitors and thus are useful for treatment of acne, seborrhea female, hirsutism o? benign prostatic hypertrophy.
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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
- Granted June 4, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2008.
- 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
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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.