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Expired Canadian patentCanada

Method and reagent for measurement using an enzyme- labelled antibody

CA 1192133 A · Owner: Eisai Co. Ltd. · Inventors: Tsuiki, Nobuaki; Sawada, Takashi; Naraki, Tohru

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Abstract From the Canadian patent

A method for measuring the amount of an antigen or antibody in a serum by the solid phase method using an enzymelabelled antibody, which comprises adding before the measurement one reagent or a combination of two reagents selected from the group consisting of EDTA, kaolin, an antigen-antibody complex, an ammonium salt, zymosan and anti-Clq to the serum or the antigen-antibody reaction system involved in the measurement, and a reagent kit therefor. By use of such method and reagent kit, a non-specific measurement inhibitor present in the serum may be removed.

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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 20, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 18, 1982
GrantedAugust 20, 1985
Term endedAugust 20, 2002
Patent numberCA 1192133 A
Classification (IPC)G01N33/53 +1 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedJune 18, 1982Patent grantedAug 20, 1985Term endedAug 20, 2002

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