Method for adding an apparent non-signal line to a rapid...

Details Method for adding an apparent non-signal line to a rapid... Method for adding an apparent non-signal line to a rapid...

2007-02-20

2007-02-20

Nguyen, Bao-Thuy L. (Department: 1641)

Chemistry: analytical and immunological testing

Involving diffusion or migration of antigen or antibody

C436S169000, C436S172000, C436S175000, C436S530000, C436S533000, C436S807000, C436S170000, C436S823000, C435S287800, C435S287900, C435S805000, C422S051000, C422S051000, C422S051000, C422S067000

Reexamination Certificate

active

10241822

ABSTRACT:
A test device and method for determining the presence or absence of one or more analytes in a fluid sample, the test device including a support or member bearing a mark thereon, and a matrix or member containing a capture zone. In operation, an observation area in the test device becomes transparent, thereby allowing the user to view a mark that is present on a support that is disposed beneath the observation area. Typically, the mark on the underlying support is configured as a minus (−) sign. In the absence of analyte in the sample, the test device presents a negative result as a minus (−) signal. In the presence of analyte in the sample, however, the mark operates in concert with a perpendicular test line on the observation area to present a positive result as a plus (+) signal that is visible to the user.

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