Pharmaceutical composition which contains a pharmaceutically suitable carrier and the compound having the structure (7 ,17 )-17-hydroxy-7-methyl-19-nor-17-pregn-5(10)-en-20-yn -3-one
CA 2011452 C · Owner: Akzo Nobel N.V. · Inventors: Van Doornum, Emile Martin; Sas, Gerard Arnoud Jozef Maria Theresia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pharmaceutical composition which contains a pharmaceutically suitable carrier and the compound having the structure (7.alpha.17.alpha.)-17-hydroxy-7-methyl-19-nor-17pregn-5(10)-en-20-yn-3-one, characterized in that the said compound is crystalline pure and completely or virtually completely free from the other crystalline form.
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 March 5, 1990 and granted May 25, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2012.
- 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.