Substituted benzo1,4dioxanes as antiobesity agents
CA 2271885 A1 · Owner: American Home Products Corporation · Inventors: Venkatesan, Aranapakam M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to novel substituted 1,4-benzodioxane compounds having antidiabetic, antihyperglycemic, and antiobesity properties represented by formula (II) wherein R1 and R6 are independently hydrogen C1 to C6 alkyl, trifluoromethyl, cyano C1 to C6 alkoxy, or halogen; R2 is hydrogen or C1 to C6 trialkylsilyl; R3 is hydrogen or C1 to C6 alkoxycarbonyl; or R2 and R3 are joined to form the oxazolidinone ring (III); R4 and R5 are independently hydrogen or C1 to C6 alkyl; R7 and R8 are independently OR9 or NR10R11; R9 is hydrogen, C1 to C12 alkyl, C1 to C12 cycloalkyl C1 to C12 silylalkyl, phenyl, naphthyl phenyl C1 to C6 alkyl, C1 to C6 alkoxy C1 to C6 alkyl pyridyl, thiophenyl, …
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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 December 18, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 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
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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.