17-.beta.-oestradiol derivatives, processes for their preparation and medicaments containing these compounds
CA 2091268 A1 · Owner: Bauss, Frieder · Inventors: Bosies, Elmar; Esswein, Angelika; Bauss, Frieder
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
53-, Summary, Compounds of the formula I (I), in which Sp signifies a spacer, Z = valency bond , , NH or S, A = hydrogen, hydroxyl or amino possibly substituted by lower alkyl, alk = a straight-chained or branched alkylene chain with 1 - 6 carbon atoms, R7 = hydrogen or lower alkyl as well as their pharmacologically acceptable salts processes for their preparation, as well as medicaments which contain these compounds for the treatment of osteoporosis.
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 September 14, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2013.
- 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.