Decaffeination process
CA 1069376 A · Owner: Societe Des Produits Nestle S.A. · Inventors: Tien-Szu Liu, Richard; Margolis, Geoffrey; Rushmore, Dean F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed wherein the decaffeination of aqueous extracts of vegetable material with non-ionic hydrophobic resin may be performed in a continuous manner. In accordance therewith, extract is contacted with resin to effect decaffeination, exhausted resin containing adherent caffeine and non-caffeine water solubles is leached with water to remove the caffeine the caffeine-free resin is then washed with a solution comprising water and an organic solvent to elute noncaffeine water solubles and then the resin is ?osed with water to permit its reuse in the further decaffeination of vegetable material extracts.
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
- Granted January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.