Substituted n-aryl-o-aryloxyalkyl carbamates and their use as herbicides
CA 2307344 A1 · Owner: Riebel, Hans-Jochem · Inventors: Drewes, Mark Wilhelm; Kluth, Joachim; Heitkamper, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel substituted n-aryl-o-aryloxyalkyl carbamates of general formula (I), wherein m represents the numbers 0 1 or 2, n represents , the numbers 0, 1 2, 3 or 4, R1 represents cyano, halogen or alkyl or alkoxy said alkyl or alkoxy being optionally substituted by cyano halogen or C1-C4 , alkoxy and each having 1 to 4 carbon atoms; R2 represents alkyl optionally substituted by cyano, halogen or C1-C4 alkoxy and each having 1 to 4 carbon atoms, R3 represents cyano, fluorine, bromine iodine or alkyl, alkoxy or , alkoxy carbonyl optionally substituted by cyano halogen or C1-C4 alkoxy, each , having up to 4 carbon atoms; and R4 represents cyano bromine, iodine or , …
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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 October 7, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2020.
- 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.