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Expired Canadian patentCanada

Gram negative bacteruria test

CA 1292175 C · Owner: Michaels, Angela A. · Inventors: Michaels, Angela A.

CIPO record

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Abstract From the Canadian patent

A screening method for the determination of 104 gram negative bacteria per milliliter of an undiluted urine sample and a unitary screening test device for the determination of at least 105 gram negative bacteria per milliliter of an undiluted urine sample. The method and test device make use of Limulus amebocyte lysate (LAL) and a synthetic substrate containing a chromogenic or fluorosenic leaving group capable of being cleaved by activated lysate. This screening method and unitary screening device provide a quick, convenient inexpensive indication of the possible presence of a urinary tract infection caused by gram negative bacteria.

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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 November 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 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.
FiledNovember 28, 1986
GrantedNovember 19, 1991
Term endedNovember 19, 2008
Patent numberCA 1292175 C
Classification (IPC)C12Q1/06 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 28, 1986Patent grantedNov 19, 1991Term endedNov 19, 2008

Sources & verification

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