Reduced step dual path immunoassay device and method
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United States of America Patent
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Dec 10, 2013
Grant Date -
Aug 16, 2012
app pub date -
Feb 10, 2011
filing date -
Feb 10, 2011
priority date (Note) -
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Abstract
Test cells have a first sorbent strip with a sample receiving location and defining a first migration path, a distinct second sorbent strip which receives buffer solution and at least partially defines a second migration path distinct from and elongated relative to the first migration path, conjugate supported by the second strip, a test site located at a junction of the first and second strips and having an immobilized ligand-binding mechanism, and a divider which directs a first amount of the buffer to the first strip to move the sample to the test site and a second amount to the second strip to move the conjugate to the test site. The first and second migration paths have first and second lengths chosen so that ligand in the sample reaches the test site and binds to the immobilized ligand-binding mechanism prior to the conjugate reaching the test site.
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