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Apparatus for immunoassays with vent chennels in the container side wall

  • US 5,120,504 A
  • Filed: 07/12/1989
  • Issued: 06/09/1992
  • Est. Priority Date: 07/14/1986
  • Status: Expired due to Fees
First Claim
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1. An apparatus for use in a ligand receptor assay process for the detection of a target analyte in a fluid sample, said apparatus comprising:

  • a) a test zone to which is bound a receptor;

    b) a liquid absorbing zone, having a top surface, which is in liquid receiving relationship with said test zone;

    c) a single container that is impervious to liquids which encloses said test zone and said liquid absorbing zone;

    d) a sealable opening in said container to permit addition of assay reagents to said test zone; and

    e) at least one vent port, comprised of grooves located within the walls of said container, in close proximity to, and in communication with, said sealable opening and also in communication with said liquid absorbing zone wherein said vent port provides a means for discharging from said container gas displaced from said liquid absorbing zone, the flow of said gas being in a direction opposite to the flow of assay reagents through said liquid absorbing zone and not through the top surface of said liquid absorbing zone.

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