Herbicidal heterocyclically substituted benzoylisothiazoles
CA 2251601 A1 · Owner: Westphalen, Karl-Otto · Inventors: Von Deyn, Wolfgang; Engel, Stefan; Hill, Regina Luise
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
4-benzoylisothiazoles have the general formula (1) in which the substituents , have the following meanings: X stands for oxygen or sulphur; R1 stands for hydrogen, alkyl, alkenyl, alkinyl, optionally substituted alkoxycarbonyl aryl, heterocyclyl or hetaryl; R2 stands for hydrogen alkyl, alkenyl, alkinyl, cycloalkyl or cycloalkenyl whereas these radicals can bear one or several halogen, alkyl, alkenyl or alkinyl groups or R2 stands for aryl, hetaryl or heterocyclyl; R3 stands for a radical of general formula (2) in , which Z and the R4, R5, R6 and R7 substituents have the meanings given in claim 1. Also disclosed are the salts commonly used in agriculture of the 4benzoylisothiazoles of …
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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 14, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 2019.
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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.