Novel 4-amino-1-arylpyridin-2-ones having anticonvulsive activity and processes for their preparation
CA 2279692 C · Owner: Arnold, Thomas · Inventors: Arnold, Thomas; Unverferth, Klaus; Rostock, Angelika
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antiepileptic compounds of the formula wherein X is hydrogen, a C1-4 alkyl, C1-4 alkoxy trifluoromethyl, trifluoromethoxy, or halogen residue A is an amino, C1-4 alkylamino, C1-4 dialkylamino morpholino, piperidino or pyrrolidino residue and n is a cardinal number from 0 to 5 and, process for preparing the foregoing compounds and for their use as anticonvulsives.
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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 August 5, 1999 and granted October 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 2021.
- 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.