Substituted alkylaminopyridazinone derivatives, process for the preparation thereof and pharmaceutical composition containing the same
CA 2461467 A1 · Owner: Szenasi, Gabor · Inventors: Wellmann, Janos; Szenasi, Gabor; Harsing, Laszlo Gabor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New substituted alkylaminopyridazinone derivatives of the general Formula (I) (wherein R1 is hydrogen or alkyl having 1-4 carbon atoms; X is hydrogen or halogen; R2 is hydrogen or alkyl having 1-4 carbon atoms; n is 1 2 or 3; Q , and W independently from each other stand for -N= or -CH=; and R4 and R5 independently from each other represent hydrogen halogen, trifluoromethyl or , alkoxy having 1-4 carbon atoms) and pharmaceutically acceptable acid addition salts thereof possess useful anxiolytic and cognition enhancing properties.
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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 September 26, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2024.
- 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.