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Expired Canadian patentCanada

Alkaline proteases, microorganisms producing same and detergents

CA 1297821 C · Owner: Lion Corporation · Inventors: Negi, Tahee; Takeuchi, Keiji; Shimogaki, Hisao

CIPO record

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Abstract From the Canadian patent

Novel microorganisms are provided which belong to the genus Bacillus and have ability of producing novel alkaline proteases. The alkaline proteases have excellent stability in highly alkaline conditions when blended with detergents and, improve detergency of the detergents. A process for the production of such alkaline proteases is also provided wherein the novel microorganisms are cultured.

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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 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 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.
FiledJune 5, 1986
GrantedMarch 24, 1992
Term endedMarch 24, 2009
Patent numberCA 1297821 C
Classification (IPC)C12N9/54 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedJune 5, 1986Patent grantedMarch 24, 1992Term endedMarch 24, 2009

Sources & verification

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