Expired Canadian patentCanada
Processes for the diastereoselective synthesis of nucleosides
CA 2069063 C · Owner: Shire Biochem Inc. · Inventors: Tse, Allan H. L.; Siddiqui, M. Arshad; Mansour, Tarek
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to highly diastereoselective processes for production of cisnucleosides and nucleoside analogues and derivatives in high optical purity and intermediates useful in those processes.
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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 May 20, 1992 and granted July 15, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 20, 1992
GrantedJuly 15, 1997
Term endedMay 20, 2012
Patent numberCA 2069063 C
Classification (IPC)C07H19/04 +2 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.