1,1-dioxo-2h-1, 2-benzothiazine-3-carboxamide derivatives, method for preparing same and pharmaceutical compositions comprising same
CA 2432807 A1 · Owner: Rapp, Maryse · Inventors: Bizot-Espiard, Jean-Guy; Mounetou, Emmanuelle; Giraud, Isabelle
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a compound of formula (I) wherein: (a) represents a single or double bond; R?1? represents a hydrogen atom or a hydroxy alkoxy, acyloxy, alkylsulphonyloxy, arylsulphonyloxy or arylalkoxy group; R?2? represents a hydrogen atom or an alkyl group; R?3? and R?4? identical or different, represent each a hydrogen a halogen atom or an alkyl, hydroxy or alkoxy group; Ak represents an alkylene chain; R?5? R?6? and R?7?, identical or different, represent each an alkyl group or R?5?, R?6? and R?7? together with the nitrogen which bears them form a saturated or unsaturated nitrogenous heterocycle; X represents a halogen atom; and its optical isomers when they exist.
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 December 21, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2023.
- 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.