Method for preparing a cyanobiphenyl
CA 2265438 C · Owner: Alami, Mouad · Inventors: Cahiez, Gerard; Alami, Mouad; Riguet, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for preparing o-(p-tolyl)benzonitrile characterised in that one o-halobenzonitrile is treated with one halogenide of p-tolylmagnesium in presence of one manganese salt and one co-catalyst containing a transition metal.
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 September 8, 1997 and granted July 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2019.
- 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.