Modafinil synthesis process
CA 2525317 C · Owner: Cephalon France · Inventors: Rose, Sebastien
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for preparing modafinil having a defined granulometry which comprises the steps of: a) preparing a solution of DMSAM ; b) contacting the solution obtained with NH3 at a predetermined temperature and a predetermined stirring; and c) isolating the modafinil formed wherein , said temperature and said stirring are predetermined in order to obtain said defined granulometry.
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 May 5, 2004 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 5, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2026.
- 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.