Assay devices
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United States of America Patent
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Dec 5, 2000
Grant Date -
N/A
app pub date -
Feb 17, 1998
filing date -
Feb 14, 1997
priority date (Note) -
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Abstract
An assay device incorporates a composite strip comprising at least two bodies of porous liquid-conductive material in liquid-flow contact with each other via an interface and together defining at least part of a liquid flow path through which liquid must flow during the performance of an assay, wherein at said interface the lateral dimension, relative to the direction of the liquid flow path, of the contact area of the upstream body is narrowed such that liquid flow from the upstream body into the downstream body is focused towards the centre-line of the flow path in the downstream body, thereby reducing the likelihood that liquid will deviate from the intended flow path. The upstream body can be a sample-collecting wick, terminating at the interface as a point or prow (FIG. 7).
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