Method for separating and purifying adipic acid
CA 2322701 A1 · Owner: Leconte, Philippe · Inventors: Leconte, Philippe; Fache, Eric; Costantini, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns the treatment of reaction mixtures derived from an oxidation reaction of cyclohexane into adipic acid and more particularly the separation of the different constituents of said mixtures and the purification of the adipic acid.
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 February 24, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 24, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 24, 2021.
- 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.