Herbicidal compositions
CA 2001507 A1 · Owner: Bansal, Harjinder S. · Inventors: Bartley, Michael R.; Collins, David J.; Kay, Ian T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of killing or controlling unwanted plants by applying to the plant on to a locus thereof an effective amount of a compound of formula (I), or a salt thereof: wherein R1 R2, R3, R4 and R5 are, independently selected from hydrogen hydroxy, alkyl, alkoxy, alkylcarbonyl, halogen nitrile, nitro, haloalkyl and haloalkoxy; R6 is hydrogen, hydroxy, amino, lower alkyl halogen, nitrile, haloalkyl, nitro, aryl or a group C(O)mR10, wherein R10 is hydrogen alkyl, alkenyl, alkynyl or, phenyl any of which may be optionally substituted and m is 1 or 2: R7 is hydrogen, lower alkyl haloalkyl, C(O)mR10 or halogen; or R6 and R7 together form an optionally substituted alkylene chain of 2 or 3 carbon …
Read the whole patent
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 25, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.