Expired Canadian patentCanada
4-sulfanimide-quinoline nmda antagonists
CA 2104297 C · Owner: Stemerick, David M. · Inventors: Mcdonald, Ian A.; Harrison, Boyd Lynn; Stemerick, David 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
The present invention is directed to a new class of 4-sulfanimide-quinoline derivatives and to their use as NMDA antagonfists.
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 11, 1992 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 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.
FiledFebruary 11, 1992
GrantedMay 27, 2003
Term endedFebruary 11, 2012
Patent numberCA 2104297 C
Classification (IPC)C07D215/48 +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.