Phenylurea derivatives
CA 1100530 A · Owner: Basf Aktiengesellschaft · Inventors: Linhart, Friedrich; Jacobs, Peter; Wuerzer, Bruno
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
N-Phenyl-N'-methyl-N'-methoxyurea derivatives of the formula:, where R denotes branched alkyl of 4 or 5 carbon atoms have a very good herbicidal action on unwanted monocotyledonous and dicotyledonous (grassy and broadleaved) plants including, Gallium aparine, and are excellently tolerated by cereals especially winter cereals (rye, wheat, barley) upon both, preemergence and postemergence application.
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 5, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 1998.
- 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.