Process for regeneration of ion-exchange resins used for sugar decolorization
CA 2223883 C · Owner: Rar - Refinarias De Acucar Reunidas, S.A. · Inventors: Rocha San Miguel Bento, Luis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for regeneration of ion-exchange resins used in sugar decolorization, using a sucrose solution with sodium or calcium chloride or another chloride, namely potassium or a mixture of those chlorides alkalinised with calcium , hydroxide. The effluent from this resin regeneration process containing , sucrose and a low content of chloride ions can be used, directly or after a , chemical or physical treatment in sugar production or sugar refining processes.
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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 December 19, 1995 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2017.
- 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
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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.