Substituted sulfonamide derivative and a pharmaceutical composition comprising the same
CA 2080128 A1 · Owner: Asahi Kasei Kogyo Kabushiki Kaisha · Inventors: Kajihara, Akiro; Asano, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a substituted sulfonamide derivative represented by formula (I) or a pharmaceutically acceptable acid addition salt thereof, (I) wherein A represents a hydrogen atom or an alkyl group G represents a methylene group or an alkylene group Q1, represents an ethylene group, Q2 represents an ethylene group or a trimethylene group, E represents an alkyl group or a group represented by a formula selected from formula (II-a) and (II-b), - G - J - Z (II-a) - G - Z (II-b), wherein G is as defined above J represents an, oxygen atom, a sulfur atom or a nitrogen atom and, Z represents an aryl group unsubstituted or substituted with an alkyl group or an alkoxy group or a heterocyclic group, …
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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 February 13, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 13, 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.