Heterocyclic herbicides
CA 2006368 A1 · Owner: Astles, David P. · Inventors: Spencer, John E.; Astles, David P.; Flood, Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
T 580 FF, ABSTRACT, "HETEROCYCLIC HERBICIDES" Compound of the general formula (I), (I) wherein X, Y and Z, which may be the same or different,each represents hydrogen, halogen alkyl, haloalkyl, hydroxy, alkoxyalkyl alkoxy, haloalkoxy, cycloalkyl, optionally substituted aryl alkylthio, arylthio, optionally substituted amino or a group -Co2R7, wherein R7 is hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl optionally, substituted aryl or optionally substituted aralkyl or, X and Y together or Y and Z together represent a divalent group forming, together with the carbon atoms to which they are attached, a ring structure; R1 represents a group -A-CH=CHCH3,-A-C--CCH3 …
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 December 21, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 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.