Arylethers, their manufacture and methods of treatment
CA 2070796 A1 · Owner: Main, Alan J. · Inventors: Main, Alan J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
4-18680/A/CGC 1559, ARYLETHERS,THEIR MANUFACTURE AND METHODS OF TREATMENT Abstract of the Invention, The invention relates to the compounds of the formula (I), and pharmaceutically acceptable salts thereof in which:, R is hydrogen or an acyl radical which is derived from an organic carbonic acid an, organic carboxylic acid, a sulfonic acid or a carbonic acid;, R1 is a substitment selected from an aliphatic hydrocarbon radical an araliphatic, hydrocarbon radical and a cycloaliphatic hydrocarbon radical; X1 and X3, independently of one another are oxygen (-O-) or sulphur (-S-); and X2 is a divalent aliphatic hydrocarbon radical which may be interrupted by an aromatic radical;, wherein the …
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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 June 9, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2014.
- 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.