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Expired Canadian patentCanada

A device and method for detecting microorganisms

CA 1339512 C · Owner: Driscoll, Richard Cornelius · Inventors: Calandra, Michael John; Turner, James Edward, Jr.; Diguiseppi, James Lawrence, Jr.

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Abstract From the Canadian patent

An instrument and a sealable, sterilizable vessel for detecting the presence of microorganisms in a specimen, the vessel containing a liquid culture medium and a sensor means with an indicator medium therein. Changes in the indicator medium resulting from pH change or change in CO2 concentration in the medium are detected from outside the vessel.

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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 October 28, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 2014.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 14, 1989
GrantedOctober 28, 1997
Term endedOctober 28, 2014
Patent numberCA 1339512 C
Classification (IPC)C12Q1/04 +2 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedMarch 14, 1989Patent grantedOct 28, 1997Term endedOct 28, 2014

Sources & verification

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