Benzoisothiazole and benzoisoxazole-3-carboxamides a process for their preparation and their use as medicaments
CA 2067404 C · Owner: Aventis Pharmaceuticals Inc. · Inventors: Hrib, Nicholas J.; Jurcak, John G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Benzoisothiazole and benzoisoxazole-3-carboxamides a process for their , preparation and, their use as medicaments The present invention relates to benzisothiazole- and benzisoxazole-3carboxamides of the, formula I, wherein R1 is hydrogen or loweralkyl; R2 is loweralkyl or a group of the , formula, R3 is hydrogen or loweralkyl; A is loweralkylene a group of the formula, -CHR4CH=CHCHR4or-CHR4C.ident.CR4-; R4 is hydrogen or loweralkyl; X is O or S; W, is N or CH; Y is hydrogen, loweralkyl loweralkoxy, hydroxy, halogen, or , trifluoromethyl; Z is hydrogen, loweralkyl, loweralkoxy hydroxy, halogen, or trifluoromethyl; n is 1 or 2;, wherein the solid line (~) refers to the point of attachment …
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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 8, 1992 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 8, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 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
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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.