Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Calorimeter
Patent
1992-11-23
1995-05-30
McMahon, Timothy M.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Calorimeter
422 57, 422 58, 422101, 435 71, 435301, 435805, G01N 3353
Patent
active
054198704
ABSTRACT:
A device for performance of ligand-receptor assay methods for determining the presence of a liquid. The preferred ligand-receptor pair are antigen-antibody pairs. The device has a membrane having the receptor physically bound to its surface. The membrane is disposed at the top of a body member, and is affixed thereto by means for attaching, which is preferably a cap with a funnel depression. A porous means is disposed below the membrane to absorb liquid. Substantially all of the top surface of the membrane is exposed. The receptor site typically occupies only a portion of the top of the membrane, and in a preferred embodiment, a funnel member releasably attaches to the cap, thereby conveying the sample through only that area of the membrane having the receptor site. The device has a piston means disposed inside the body member, and in air-tight seal with the body member. Means to actuate the piston means are disposed outside the body member. The piston means creates a region of reduced pressure to urge the sample through the membrane.
REFERENCES:
patent: 4789526 (1988-12-01), Matkovich
patent: 4797259 (1989-01-01), Matkovich et al.
patent: 4797260 (1989-01-01), Parker
patent: 4874691 (1989-10-01), Chandler
patent: 4908319 (1990-03-01), Smyczek et al.
McMahon Timothy M.
V-Tech, Inc.
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