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Test strip with vent opening

  • US 7,829,023 B2
  • Filed: 06/18/2004
  • Issued: 11/09/2010
  • Est. Priority Date: 06/20/2003
  • Status: Active Grant
First Claim
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1. A test strip, comprising:

  • a base substrate having a reagent layer disposed thereon;

    a chamber cover connected to the base substrate and overlying the base substrate and the reagent layer;

    a body cover connected to and overlying the base substrate, the body cover being horizontally separated from the chamber cover to form a horizontal gap between the body cover and the chamber cover;

    a sample receiving chamber disposed between the base substrate and the chamber cover, the gap being in communication with the sample receiving chamber and defining a vent opening that allows air to escape as fluid enters the sample receiving chamber;

    wherein the test strip includes two spaced-apart edges defining a width of the test strip, the gap extending across the full width of the test strip to define a slot extending from one of the edges to the other; and

    wherein the gap is bordered by a hydrophobic region adjacent to the body cover, further wherein sample fluid entering the sample receiving chamber will progress to the gap but no farther.

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