Novel 19-nor steroids substituted in position 11.beta. preparation method and intermediates, application as medicines and pharmaceutical compositions containing them
CA 2309242 A1 · Owner: Nique, Francois · Inventors: Nique, Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns compounds of formula (I) in which: X is a halogen atom; D represents the radical of a pentagonal or hexagonal cycle optionally substituted and optionally unsaturated; R¿1? R¿2?, R¿3?, R¿4?, X and n are as defined in the description. The invention also concerns the preparation method and intermediate their application as medicine and the pharmaceutical compositions containing them.
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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 November 16, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2020.
- 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.