Method for filtering a three-phased reaction mixture
CA 2257346 C · Owner: Sever, Lionel · Inventors: Perrona, Philippe; Sever, Lionel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention discloses a method for filtering a three-phased reaction mixture,comprising a liquid phase an undissolved solid catalytic phase and a gas phase. More precisely it consists tangentially in filtering on one membrane filter at least one part of a three-phased reaction mixture comprising one liquid phase in which are found nitrile functions one gas phase comprising hydrogen and one solid catalytic phase comprising nickel and/or Raney cobalt or a supported metal catalyst, in recycling the catalyst while recuperating at least one part of the filtrate comprising the reaction products.
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 29, 1997 and granted September 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 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.