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Expired Canadian patentCanada

Liposome based homogeneous immunoassay for diagnostic tests

CA 1309344 C · Owner: Hu, Roger C. · Inventors: Hu, Roger C.; Jou, Yi-Her; Lagocki, Peter A.

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Abstract From the Canadian patent

LIPOSOME BASED HOMOGENEOUS, IMMUNOASSAY FOR DIAGNOSTIC TESTS" ABSTRACT, The present invention provides for novel homogeneous immunoassay systems involving complementmediated lysis of marker-encapsulating lipid vesicles (liposomes) for detection of analyte in a fluid sample. These systems do not require the separation of unbound antigens and/or antibody conjugates yet provide highly sensitive procedures for analyte detection. Liposomes containing a marker are coupled to antibody, fragments in a way which confers the liposomes with immunological specificity yet avoids sensitizing the liposomes to complement mediated lysis in the absence of analyte. Antibody sensitized liposomes (the first …

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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 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 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.
FiledJuly 27, 1988
GrantedOctober 27, 1992
Term endedOctober 27, 2009
Patent numberCA 1309344 C
Classification (IPC)G01N33/54 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJuly 27, 1988Patent grantedOct 27, 1992Term endedOct 27, 2009

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