Expired Canadian patentCanada
Irna agents comprising asymmetrical modifications
CA 2518475 C · Owner: Bumcrot, David · Inventors: Bumcrot, David; Manoharan, Muthiah
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An iRNA agent comprising: a sense strand sequence having at least 4 asymmetrical 2'-O-alkyl modifications at the 4 terminal nucleotides of the 5' end, and an antisense sequence having at least 4 asymmetrical phosphorothioate modifications.
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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 March 8, 2004 and granted December 23, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 8, 2004
GrantedDecember 23, 2014
Term endedMarch 8, 2024
Patent numberCA 2518475 C
Classification (IPC)A61K48/00 +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.