M-isopropyl phenylureas
CA 1078407 A · Owner: Itt Industries · Inventors: Wittenbrook, Lawrence S.; Neyman, Gary B.; Timmons, Richard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the structural formula in which R is from the group consisting of hydrogen methyl, ethyl and methoxy; m and n are integers from 0 to 3; and X is hydrogen when the sum (m+n) exceeds 4 otherwise X is, from the group consisting of H F, and Cl. The compounds, possess herbicidal properties and are particularly effective in post-emergence weed control. -1-
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
- Granted May 27, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 1997.
- 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.