Prostacyclin derivatives, process for the preparation thereof, and use thereof as medicinal agents
CA 1252088 A · Owner: Schering Aktiengesellschaft · Inventors: Vorbruggen, Helmut; Loge, Olaf; Raduchel, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
5-Cyanoprostacyclins of Formula I I, wherein, A is a -CH2-CH2-, trans-CH=CHor -C=C-group, W is a free or functionally modified hydroxymethylene group or a free or functionally modified group wherein the OH-group can be in the .alpha.- or .beta.-position, D and E together form a direct bond or D is the group , a straight-chain, saturated alkylene group of 1-5 carbon atoms a branched, saturated or a straight-chain unsaturated alkylene group, of 2-5 carbon atoms any of which can optionally be sub-, stituted by fluorine atoms n is the number 1, 2, or 3, E is oxygen sulfur, a -C=C-bond, a direct bond, or a -CR4=CR5-group wherein R4 and R5 are different and can be a hydrogen atom or an alkyl …
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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 April 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 2006.
- 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.