2',5' phosphorothioate/phosphodiester oligoadenylates and antiviral uses thereof
CA 2199747 C · Owner: Suhadolnik, Robert J. · Inventors: Suhadolnik, Robert J.; Pfleiderer, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optically active antiviral compounds having formula (I) wherein m is 0, 1, 2 , or 3; n and q are selected from the group of 0 and 1 provided that n and q , may not both be zero; R R1 and R2 are independently of each other selected from the group consisting of oxygen and sulfur provided that all R, R1 and , R2, may not be oxygen and further provided that all R, R1, and R2 may not be sulfur. The compounds possess increased antiviral activity and/or metabolic stability.
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 August 22, 1995 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 22, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2017.
- 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.