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Expired Canadian patentCanada

High temperature method for the production of ribavirin

CA 1297058 C · Owner: Lievense, Jefferson Clay · Inventors: Sawyer, Joanna Darlene; Lievense, Jefferson Clay; Terpolilli, Anthony Joseph

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Abstract From the Canadian patent

0-, HIGH TEMPERATURE METHOD FOR THE, PRODUCTION OF RIBAVIRIN ABSTRACT of the Disclosure, A method for the production of a. 1,2,4-triazole nucleoside comprising the step of reacting a ribose donor with a triazole compound in the presence of an enzyme preparation deriued from Brevibacterium acetylicum is disclosed. The method is characterized in that the ribose donor is guanosine and the temperature during at least a part of the reaction is at or above 65°C. The method is capable of high production rates and high concentrations of the final product.

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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

  • Granted March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 11, 1988
GrantedMarch 10, 1992
Term endedMarch 10, 2009
Patent numberCA 1297058 C
Classification (IPC)C12P19/28 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJuly 11, 1988Patent grantedMarch 10, 1992Term endedMarch 10, 2009

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