5-(dioxabicyclohept-6-yl)-cyclohexenone oxime ethers, their preparation and their use
CA 2277019 A1 · Owner: Rheinheimer, Joachim · Inventors: Misslitz, Ulf; Walter, Helmut; Maywald, Volker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns 5-(dioxabicyclohept-6-yl)-cyclohexenone oxime ethers of formula (I) in which the substituents have the following meanings: R1 is hydrogen, the equivalent of an agriculturally useful cation C1-C10 , alkylcarbonyl, C1-C10 alkylsulphonyl C1-C10 alkylphosphonyl, benzoyl, benzene sulphonyl or benzene phosphonyl; R2 is C1-C6 alkyl; R3 in each case , independently of each other is hydrogen or C1-C4 alkyl; Z is a C1-C6 alkylene, C3-C6 alkenylene or C3-C6 alkinylene chain which can carry an exomethylene substituent (=CH2) and/or in each case a further one to three substituents selected from a group comprising C1-C3 alkyl substituents and halogen atoms; a C3-C6 alkylene …
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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 December 19, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2019.
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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.