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US 6,607,922 B2Granted
Immunochromatographic assay method and apparatus
AssigneeQuantum Design, Inc.
InventorRonald T. LaBorde
Life of this patent
Estimating the term…
Abstract
An immunochromatographic assay employing superparamagnetic particles to lable the target analytes. An opaque cover prevents misinterpretive readings in field situations and provides a protective surface on the porous membrane. Additional features include separability of the test strip from any backing or housing which is configured to support the strip, and that quantitative measurements of the target analytes are easily and accurately made by means of an electromagnetic reader device.
Claims6
A lateral flow assay device for quantitative detection of target analytes in a sample, said device comprising:
- an assay support member having a first end and a second end;
- a sample receiving element at one end of said support member for introduction of the sample to be analyzed into said device;
- and
- an immunoassay test strip comprising:
- a porous analytical membrane removably mounted adjacent to and generally parallel with said support member, said analytical membrane having a first end and a second end;
- at least one capture region in said analytical membrane intermediate said first and second ends thereof, said at least one capture region being configured to capture a labeled analyte moving from said first end of said analytical membrane toward said second end of said analytical membrane;
- a backing member between said analytical membrane and said support member to facilitate removal of said analytical membrane from said support member for reading the assay and for archiving said test stripy;
- a protective membrane covering said analytical membrane on the side opposite to said support member, said protective membrane being optically non-transparent;
- and
- at least one magnetic standard line printed on said protective membrane.
7 more elements
Dependencies are inferred from the claim text.