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Expired Canadian patentCanada

Stable freeze-dried lowenstein-jensen medium

CA 1094433 A · Owner: Beatrice Foods Co. · Inventors: Williams, Wilmore

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A storage stable Lowenstein-Jensen medium is prepared by freeze drying the liquid medium to provide a powder having a moisture content of less than 8% by weight. The dried powder is stable at ambient temperature for at least one year and may be easily reconstituted to the fluid Lowenstein-Jensen medium by simple mixing at ambient conditions.

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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 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 27, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 7, 1978
GrantedJanuary 27, 1981
Term endedJanuary 27, 1998
Patent numberCA 1094433 A
Classification (IPC)C12Q1/04 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedApril 7, 1978Patent grantedJan 27, 1981Term endedJan 27, 1998

Sources & verification

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