4-carboxy-2-aryloxyphenoxyalkyl substituted heterocycles useful as herbicidal agents
CA 2083774 A1 · Owner: Guaciaro, Michael A. · Inventors: Arotin, Robert L.; Guaciaro, Michael A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
31,776, 4-CARBOXY-2-ARYLOXYPHENOXYALRYL SUBSTITUTED HETEROCYCLES USEFUL AS HERBICIDAL AGENTS ABSTRACT OF THE INVENTION, 4-Carboxy-2-aryloxyphenoxyalkyl substituted heterocycle compounds which are effective for the selective control of grass weed species in the presence of crops are described. Also described are a method for the selective herbicidal use of the compounds and methods for their preparation.
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 November 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2014.
- 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.