1-(n-heterocyclic containing)-3-carboxy-4-halogen- phenyl derivatives
CA 1210766 A · Owner: Nippon Kayaku Kabushiki Kaisha · Inventors: Yamada, Osamu; Kobayashi, Shinichi; Saito, Mikio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE OF THE INVENTION:, A HETEROCYCLIC COMPOUND AND A HERBICIDAL COMPOSITION CONTAINING SAID COMPOUND, ABSTRACT OF THE DISCLOSURE: A compound of the formula:, (1), wherein W is wherein R4 is lower alkyl, X is oxygen or sulfur and n is, integer of 3 or 4; R1 is hydrogen or halogen; R2 is halogen; R3 is hydrogen or C1 - C8-alkyl which may have lower alkoxy; a herbicidal composition containing said compound as an effective component; a method for killing weeds using said compound; and processes for the production of said compound are disclosed hereinafter.
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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
- Granted September 2, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 2003.
- 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.