Anticonvulsant enantiomeric amino acid derivatives
CA 2248317 C · Owner: Research Corporation Technologies, Inc. · Inventors: Kohn, Harold
Overview
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 compound in the R configuration about the asymmetric carbon in formula (I), wherein Ar is phenyl which is unsubstituted or substituted with at least one halo group; Q is lower alkoxy and Q1 is methyl; pharmaceutical compositions containing same and the use thereof in treating CNS disorders in animals.
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 March 17, 1997 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2019.
- 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.