Substituted tetrahydroisoquinoline derivatives as modulators of dopamine d3 receptors
CA 2288308 A1 · Owner: Smithkline Beecham P.L.C. · Inventors: Branch, Clive Leslie; Stemp, Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I), wherein R1 represents a substituent selected from a hydrogen or halogen atom; a hydroxy, cyano nitro, trifluoromethyl, trifluoromethoxy trifluoromethanesulfonyloxy, pentafluoroethyl C1-4alkyl, C1-, 4alkoxy, arylC1-4alkoxy C1-4alkylthio, C1-4alkoxyC1-4alkyl, C3-6cycloalkylC1- 4alkoxy, C1-4alkanoyl, C1-4alkoxycarbonyl C1-4alkylsulphonyl, C1-, 4alkylsulphonyloxy C1-4alkylsulphonylC1-4alkyl, arylsulphonyl arylsulphonyloxy, arylsulphonylC1-4alkyl C1-4alkylsulphonamido, C1-, 4alkylamido C1-4alkylsulphonamidoC1-4alkyl, C1-4alkylamidoC1-4alkyl arylsulphonamido, arylcarboxamido, arylsulphonamidoC1-4alkyl arylcarboxamidoC1-4alkyl, aroyl, aroylC1-4alkyl or arylC1-4alkanoyl …
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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 April 27, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2020.
- 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.