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Expired Canadian patentCanada

Method for the production of ribavirin using high ribose donor concentrations

CA 1297057 C · Owner: Genencor International, Inc. · Inventors: Pochodylo, James Michael

CIPO record

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Abstract From the Canadian patent

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 enzyms preparation derived from Brevibacterium acetylicum is disclosed. The method is characterized in that the ribose donor is guanosine; the concentration of the donor is above about 100 mM; and the enzyme preparation is added before the reaction mixture gells. 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.
FiledFebruary 9, 1988
GrantedMarch 10, 1992
Term endedMarch 10, 2009
Patent numberCA 1297057 C
Classification (IPC)C12P19/28 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedFeb 9, 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.