Expired Canadian patentCanada
Agricultural ureas and isoureas
CA 1189072 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Levitt, George
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to ureas and isoureas which are useful as herbicides and plant growth regulants. In particular, compounds of the instant invention have demonstrated great selectivity.
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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 18, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 27, 1980
GrantedJune 18, 1985
Term endedJune 18, 2002
Patent numberCA 1189072 A
Classification (IPC)C07D409/00 +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.