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Expired Canadian patentCanada

Hypertonic culture media

CA 1106785 A · Owner: Pfizer Limited · Inventors: Hochstein, Francis A.

CIPO record

Overview

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Abstract From the Canadian patent

P.C. 5918, HYPERTONIC CULTURE MEDIA, Abstract of the Invention Improved hypertonic culture media, employing mannitol erythritol or sorbitol in place of sucrose to provide high osmolarity, are described for the detection and growth of microorganisms in body fluids, particularly of bacteria in blood specimens.

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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 August 11, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 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.
FiledAugust 25, 1978
GrantedAugust 11, 1981
Term endedAugust 11, 1998
Patent numberCA 1106785 A
Classification (IPC)C12N5/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedAug 25, 1978Patent grantedAug 11, 1981Term endedAug 11, 1998

Sources & verification

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