16,17-acetalsubstituted androstane-17.beta.-carboxylic acid esters
CA 1333597 C · Owner: Axelsson, Bengt Ingemar · Inventors: Andersson, Paul Hakan; Andersson, Per Ture; Thalen, Bror Arne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention refers to compounds having antiinflammatory activity characterized by the formula I, or a stereoisomeric component thereof wherein the 1,2-position is, saturated or is a double bond X1 is selected from hydrogen, fluorine chlorine and bromine, X2 is selected from hydrogen fluorine, chlorine and bromine, R1 is selected from hydrogen or a straight or branched hydrocarbon chain having 1 to 4 carbon atoms R2 is selected from hydrogen or straight and branched hydrocarbon chains having 1 to 10 carbon atoms and R3 is selected from , Y is O or S, R4 is selected from hydrogen straight or branched, hydrocarbon chains having 1 to 10 carbon atoms or from phenyl R5 is selected from hydrogen …
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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 December 20, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 20, 2011.
- 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.