Benzoxazine derivative and herbicide containing same as an active ingredient
CA 2048114 A1 · Owner: Fukami, Harukazu · Inventors: Sago, Ryuichi; Kawaguchi, Naoko; Fukami, Harukazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A benzoxazine derivative having the formula (I) and a salt thereof:, ... (I), wherein A represents N or a CY group where Y represents, a hydrogen atom or a halogen atom; X represents a halogen atom;, Z represents an oxygen atom or sulfur atom; R1 represents a hydrogen atom, a lower alkyl group which may be also substituted, where the substituent may be either one of a halogen atom, a lower alkoxy group or an aryl group, a lower alkenyl group, a lower alkynyl group or an aliphatic acyl group;, R represents a hydrogen atom or a lower alkyl group;, R3 represents a carboxyl group which may be esterified or amidated, an aliphatic acyl group which may be also substituted, where the substituent …
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 July 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2013.
- 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.