Method for separating a catalyst by membrane electrodialysis
CA 2250801 C · Owner: Rhodia Fiber And Resin Intermediates · Inventors: Horbez, Dominique; Fache, Eric; Leconte, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for separating a catalyst from a solution containing same by membrane electrodialysis is disclosed. Specifically the separation of a catalyst used in a homogeneous-phase molecular oxidation reaction is disclosed. According to the method for separating a homogeneous catalyst dissolved in a medium that also contains at least one aliphatic diacid the catalyst contains cobalt and separation is achieved by membrane electrodialysis.
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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 March 27, 1997 and granted December 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 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.