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Testing device for liquid and liquid suspended samples

  • US 5,800,785 A
  • Filed: 07/24/1996
  • Issued: 09/01/1998
  • Est. Priority Date: 11/06/1992
  • Status: Expired due to Term
First Claim
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1. A device comprising:

  • a) a housing;

    b) a testing region having a plurality of test wells contained within said housing;

    c) a liquid receiving means at an external surface of said housing;

    d) a liquid flow-directing means comprising channels providing liquid communication between said plurality of test wells and said liquid receiving means; and

    e) a single gas-venting, liquid barrier comprising a hydrophobic membrane in fluidic communication with said testing region in contact with said test wells, wherein said hydrophobic membrane contains pores that permit passage of gas at positive pressure greater than 1 pound per square inch, but which blocks the passage of liquid at pressures less than 75 pounds per square inch.

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