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Expired Canadian patentCanada

Optimized nutrient conditions for producing microorganism secondary metabolites

CA 1292962 C · Owner: Canadian Patents And Development Limited - Societe Canadienne Des Brevets Et D'Exploitation Limitee · Inventors: Marshall, J. Wayne; Marshall, J. Wayne

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Abstract From the Canadian patent

A process for increasing the production of secondary metabolites during culture of a selected fungi comprises a pulse feeding technique to enhance continued production of the desired secondary metabolites. The selected fungi is cultured in an initiating media containing assimilable sources of carbon, nitrogen and phosphates. The fungi is cultured in the media through its growth phases to produce the secondary metabolites. The culture is pulse fed during secondary metabolite production by periodically supplementing the media with an additional source of carbon. Such pulse feeding has resulted in a significant production of secondary metabolites, whereas in normal culture feeding programs the …

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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 December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 1, 1987
GrantedDecember 10, 1991
Term endedDecember 10, 2008
Patent numberCA 1292962 C
Classification (IPC)C12N1/14 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedDec 1, 1987Patent grantedDec 10, 1991Term endedDec 10, 2008

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