Hypoglycemic thiazolidinediones
CA 1279320 C · Owner: Johnson, Michael Ross · Inventors: Volkmann, Robert Alfred; Johnson, Michael Ross; Holland, Gerald Fagan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hypoglycemic 2,3-dihydro-5-benzobfuranyl-2,3-dihydro- 5-benzobthienyl-, 3,4-dihydro(2H)-6-benzo-pyranyl- and 6thiochromanyl-thiazolidine-2,4-diones of the formula (I), (where n is 0, 1 or 2;), X is O,S SO, SO2, CH2, CO, CHOH or NR5 where R5 is H lower, alkanoyl, benzyloxycarbonyl, or CO (CH2) x (6H5 where x is 1-3 optionally substituted lower alkyl;, R is H CH3 or C2H5;, R1 is H, cycloalkyl, pyridyl thienyl, furyl, naphthyl, biphenyl, tetrahydrofuranyl tetrahydrothienyl, tetrahydropyranyl, C6H4W2 or alk-W1 where alk is alkylene, ethylidene or isopropylidene W1 is, H, OH, alkoxy, thioalkyl, pyridyl furyl, thienyl, tetrahydrofuryl, tetrahydrothienyl naphthyl, cycloalkyl, or C6H4, W2, and W2 …
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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
- Granted January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2008.
- 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.