Expired Canadian patentCanada
Intermediates for pyrazole derivative herbicides
CA 1340959 C · Owner: Oya, Eiichi · Inventors: Kondo, Yasuo; Kakuta, Takuya; Watanabe, Shigeomi
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A substituted benzene derivative of the formula II: is an intermediate for preparing herbicides of the formula I: wherein A, B, G, Q, V, W, X, Y and Z are various groups.
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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 April 11, 2000. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 11, 2017.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 30, 1989
GrantedApril 11, 2000
Term endedApril 11, 2017
Patent numberCA 1340959 C
Classification (IPC)C07C317/46 +2 more
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.