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Expired Canadian patentCanada

High yield method of producing pure rebaudioside a

CA 2583909 C · Owner: Sweet Aloha Farms, Llc · Inventors: Chase, Robert Gordon; Francis, Gordon James; Jackson, Mel Clinton

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention provides a high throughput high purity, high yield system and , method of isolating and purifying rebaudioside A ("Reb")h acceptable water solubility for all commercial uses from commercially available Stevia rebaudiana starting material. The invention also provides a means of maximizing yields of 99+% purity Reb A based on the attributes of a given batch of Stevia starting material. The Reb A produced by the invention is water soluble, devoid of bitterness heretofore associated with rebaudioside sweeteners, non-caloric, and suitable for use as a reagent and as an ingredient in orally consumed products e.g. as a , sweetener, flavor enhancer and flavor modifier.

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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 October 18, 2005 and granted October 1, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 18, 2005
GrantedOctober 1, 2013
Term endedOctober 18, 2025
Patent numberCA 2583909 C
Classification (IPC)A23L27/30

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedOct 18, 2005Patent grantedOct 1, 2013Term endedOct 18, 2025

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.