Heterocyclic ether type phenoxy fatty acid derivatives and herbicidal composition
CA 1304377 C · Owner: Ura, Yasukazu · Inventors: Kawamura, Yuzi; Ikai, Takasi; Oguti, Tosihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides heterocyclic oxy phenols having the formula, (VI), These compounds are intermediates in the preparation of heterocyclic ether type phenoxy fatty acid derivatives having the formula, (I), wherein X represents a halogen atom; n is 0 1 or 2;, represents H or a lower alkyl; and R2 represents -OH -O-alkyl, OM, wherein M is an inorganic or organic salt moiety, or -NR3R4, wherein R3 and R4 independently represent H or lower alkyl.
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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 June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
- 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.