Expired Canadian patentCanada
Method for the preparation of sulphinyl pristinamycin iib
CA 2086924 C · Owner: Rhone-Poulenc Rorer S.A. · Inventors: Radisson, Xavier
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Preparation of (dialkylamino-2 alkyl) sulphinyl-26 pristinamycin IIB by oxidation of (dialkylamino-2 alkyl) thio-26 pristinamycin IIB by hydrogen peroxide in the presence of sodium tungstate in alcoholic medium.
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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 July 15, 1991 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 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.
FiledJuly 15, 1991
GrantedSeptember 14, 1999
Term endedJuly 15, 2011
Patent numberCA 2086924 C
Classification (IPC)C07D498/18 +1 more
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.