Process for the preparation of phenyl ureas
CA 1314054 C · Owner: Terlouw, Willem · Inventors: Terlouw, Willem; Goodall, Brian Leslie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of phenyl ureas which comprises reacting a nitrobenzene with an amine and carbon monoxide at an elevated temperature in the presence of a palladium catalyst, the amine being supplied continuously or stepwise during the period of the reaction. PS10010
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 March 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 2, 2010.
- 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.