Expired Canadian patentCanada
Process for the production of 2'-branched nucleosides
CA 2509687 C · Owner: Moussa, Adel · Inventors: Moussa, Adel; Waligora, Frank; Chaudhuri, Narayan
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 provides an improved process for preparing .szlig.-D and .szlig.-L 2'-C-methyl-nucleosides and 2'-C-methyl-3'-O-ester nucleosides.
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 December 12, 2003 and granted August 14, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 12, 2003
GrantedAugust 14, 2012
Term endedDecember 12, 2023
Patent numberCA 2509687 C
Classification (IPC)C07H19/06 +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.