Well-type diagnostic plate device
First Claim
1. A diagnostic test device comprising:
- a plate,at least one well formed in said plate, said at least one well having an open bottom, anda composite membrane having at least three layers including, sequentially, a microporous liquophilic reaction layer, a sealing layer, and a liquophobic barrier layer having at least one aperture therein for each said well and located substantially at the center of the well, said composite membrane coextensive with the bottom of said at least one well and forming a liquophobic, liquid-tight seal at the periphery of the well.
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Accused Products
Abstract
A diagnostic test device is provided including a plate having at least one well, preferably a plurality of wells, each with an open bottom across which a composite membrane comprising three layers is placed, with a hydrophobic, liquid-tight seal provided at the periphery of each well. The composite membrane from the top of upstream side to the bottom or downstream side, in sequence, includes a first reaction or filtration layer formed from a thin, liquophilic, microporous membrane, a second or sealing layer, preferably a hydrophobic material in sheet or fiber form, such as nonwoven polypropylene fibers, and a liquophobic, preferably hydrophobic, barrier layer having one or more apertures which allows liquid to exit the well while eliminating lateral migration of a pendant liquid drop. The liquophobic seal provided by the liquophobic sealing layer eliminates "cross-talk" by lateral diffusion or wicking.
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Citations
35 Claims
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1. A diagnostic test device comprising:
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a plate, at least one well formed in said plate, said at least one well having an open bottom, and a composite membrane having at least three layers including, sequentially, a microporous liquophilic reaction layer, a sealing layer, and a liquophobic barrier layer having at least one aperture therein for each said well and located substantially at the center of the well, said composite membrane coextensive with the bottom of said at least one well and forming a liquophobic, liquid-tight seal at the periphery of the well. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A diagnostic test system comprising:
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(1) a diagnostic test device including; (a) a plate, (b) at least one well formed in said plate, said at least one well having an open bottom, and (c) a composite membrane having at least three layers including, sequentially, a microporous liquophilic reaction layer, a sealing layer, and a liquophobic barrier layer having at least one aperture therein for each said well and located substantially at the center of the well, said composite membrane coextensive with the bottom of said at least one well and forming a hydrophobic, liquid-tight seal at the periphery of the well; and (2) means for generating a differential pressure operatively associated with said diagnostic test device. - View Dependent Claims (23, 24, 25, 26)
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27. A diagnostic test device comprising:
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(a) a first plate, at least one well formed in said first plate, said at least one well having an open bottom, and a composite membrane having at least three layers including, sequentially, a microporous, liquophilic membrane reaction layer, a sealing layer, and a liquophobic barrier layer having at least one aperture therein for each said well and located substantially at the center of the well, said composite membrane coextensive with the bottom of said at least one well of said first plate and forming a liquophobic liquid-tight seal at the periphery of the well; and (b) a second plate in liquid receiving relationship with said first plate, at least one well having an impermeable bottom in said second plate to receive liquid from said at least one well in said first plate. - View Dependent Claims (28)
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29. A diagnostic test system comprising:
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(1) a diagnostic test device including; (a) a first plate, (b) at least one well formed in said first plate, said at least one well having an open bottom, and (c) a composite membrane having at least three layers including, sequentially, a microporous, liquophilic membrane reaction layer, a sealing layer, and a liquophobic barrier layer having at least one aperture therein for each said well and located substantially at the center of the well, said composite membrane coextensive with the bottom of said at least one well of said first plate and forming a liquophobic liquid-tight seal at the periphery of the well; (2) means for generating a differential pressure operatively associated with said diagnostic test device; and (3) a second plate located intermediate and in operative relationship with said diagnostic test device and said differential pressure generating means, said second plate in liquid receiving relationship with said first plate, at least one well having an impermeable bottom located in said second plate to receive liquid from said at least one well in said first plate. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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Specification