5-chloroquinolin -8-oxyalkanecarboxylic acid derivatives, processes for their preparation and their use as antidotes for herbicides
CA 2058276 A1 · Owner: Bauer, Klaus · Inventors: Schutze, Rainer; Bauer, Klaus; Bieringer, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure Novel 5-chloroquinolin-8-oxyalkanecarboxylic acid derivatives, processes for their preparation and their use as antidotes for herbicides, The invention relates to herbicide safeners of the formula I shown in claim 1, in which, R1 and R2 are H or (C1-C4)-alkyl X is O or S or NR4, in, which R4 is H, (C1-C6)-alkyl (Cl-CB)-alkoxy or optionally, substituted phenyl A is (C1-C6)-alkylene, (C4-C8)-, alkenylene (C4-C8)-alkynylene, (C3-C8) -cycloalkylene or (C3-C8)-cycloalkenylene, R3 is (C3-C6)-alkenyloxy (C3-C6)-alkynyloxy, (substituted), phenyl-(C1-C4)-alkoxy R5R5R7Si-, R5R6R7Si-O-, R5R6R7Si-, (C1-C4)-alkoxy (C3-C6)-alkenyloxycarbonyl, (C3-C6)-, alkynyloxycarbonyl …
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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 20, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2013.
- 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.