Expired Canadian patentCanada
Oligonucleotide analogs
CA 2079777 C · Owner: Du Pont Pharmaceuticals Company · Inventors: Trainor, George L.; Huie, Edward M.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to novel oligonucleotide analogs in which one or more of the internucleotide phosphodiester linkages have been replaced by a sulfur based linkage focusing on therapeutic potential.
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 February 25, 1991 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 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.
FiledFebruary 25, 1991
GrantedJuly 30, 2002
Term endedFebruary 25, 2011
Patent numberCA 2079777 C
Classification (IPC)C07H21/00 +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.