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Expired Canadian patentCanada

Method for the preparation of cholesterol oxidase

CA 1069073 A · Owner: Eastman Kodak Company · Inventors: Goodhue, Charles T.; Masurekar, Prakash S.

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Abstract From the Canadian patent

A method for preparing cholesterol oxidase com-, prising the steps of:, a) growing a cholesterol oxidase producing microorganism in a medium comprising a nontoxic concentration of nonionic surfactant to yield extracellular cholesterol oxidase; and, b) separating the extracellular cholesterol oxidase from the medium. Preferably, cholesterol oxidase is prepared from a growth medium of Nocardia cholesterolicum species NRRL 5767 or 5768 which contains cholesterol, a suitable derivative of cholesterol or a 3-.beta.-hydroxy sterol as a cholesterol oxidase inducer and a nonionic surfactant in a concentration which is not toxic to said bacterium, which does not produce decomposition products in …

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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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 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.
Filed—
GrantedJanuary 1, 1980
Term endedJanuary 1, 1997
Patent numberCA 1069073 A
Classification (IPC)C12P21/00 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJan 1, 1980Term endedJan 1, 1997

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