1-{0-(cyclopropylcarbonyl) phenylsulfamoyl}-3-(4,6-dimethoxy-2-pyrimidinyl) urea and method for the preparation thereof
CA 2040068 C · Owner: Basf Aktiengesellschaft · Inventors: Brady, Thomas Eugene; Marc, Pierre Antoine; Condon, Michael Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a crop-selective herbicidal agent 1-{(o-(cyclopropylcarbonyl)-phenylsulfamoyl)-3-(4,6-dimethoxy-2-pyrimidinyl)urea a, method for the preparation thereof and a method for selectively controlling undesirable plant species in the presence of crops pith said crop-selective sulfamoyl urea derivative.
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 April 9, 1991 and granted August 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 9, 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.