11-aryl-benzobnaphtho2,3-dfurans and 11-aryl-benzobnaphtho2,3-dthiophenes useful in the treatment of insulin resistance and hyperglycemia
CA 2330623 A1 · Owner: Wrobel, Jay Edward · Inventors: Wrobel, Jay Edward; Dietrich, Arlene Joan; Li, Zenan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides compounds of formula (I) having a structure wherein A is hydrogen, halogen, or OH; B and D are each independently, hydrogen, halogen, CN, alkyl of 1-6 carbon atoms aryl, aralkyl of 6-12 carbon atoms, nitro amino or OR; R is hydrogen, alkyl of 1-6 carbon atoms -COR1, -, CH2CO2R1, -CH(R1a)CO2R1, or -SO2R1; R1 and R1a are each independently, hydrogen, alkyl of 1-6 carbon atoms aralkyl of 6-12 carbon atoms or aryl; E is S, SO, SO2, O; X is hydrogen, halogen alkyl of 1-6 carbon atoms, CN, perfluoroalkyl of 1-6 carbon atoms alkoxy of 1-6 carbon atoms, aryloxy, arylalkoxy of 6-12 carbon atoms nitro, amino, alkylsulfanyl of 1-6 carbon atoms, arylsulfanyl, pyridylsulfanyl, …
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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 May 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 2021.
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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.