Substituted sulfonylureas
CA 2003588 A1 · Owner: Basf Aktiengesellschaft · Inventors: Westphalen, Karl-Otto; Hamprecht, Gerhard; Mayer, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
O.Z. 0050/40504, ABSTRACT OF THE DISCLOSURE: Substituted sulfonylureas of the formula I I, where the substituents and indices have the following meanings: X is oxygen or sulfur;, Z is nitrogen or methine (= CH-); R1 is halogen or substituted or unsubstituted C1-C4-alkoxycarbonyl or C1-C3-alkoxy, or a radical -CONR6R7 where, R6 is hydrogen, C1-C8-alkyl or C1-C6-alkoxy and R7 is hydrogen or C1-C8-alkyl;, R2 is halogen or substituted or unsubstituted C1-C4-alkoxy or C1-C4-alkyl;, R3 is C1-C4-alkyl, C1-C4-alkoxy C1-C4-alkylthio, C1-C4-haloalkyl, C1-C4-haloalkoxy C1-C4-haloalkylthio, halogen, cyano, nitro amino, mono-C1-C4-alkylamino, di-C1-C4-alkylamino C2-C6-alkenyl, C1-C4-alkoxycarbonyl, …
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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 November 22, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2011.
- 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.