Chemistry: analytical and immunological testing – Involving diffusion or migration of antigen or antibody
Reexamination Certificate
2005-02-15
2005-02-15
Nguyen, Bao-Thuy L. (Department: 1641)
Chemistry: analytical and immunological testing
Involving diffusion or migration of antigen or antibody
C436S518000, C436S169000, C436S172000, C436S175000, C436S530000, C436S533000, C436S807000, C436S170000, C436S823000, C435S823000, C435S287700, C435S287900, C435S805000, C422S051000, C422S051000, C422S051000, C422S051000, C422S067000
Reexamination Certificate
active
06855561
ABSTRACT:
A test device and method for determining the presence or absence of an analyte in a fluid sample, the test device including a support bearing a mark thereon, and a matrix defining an axial flow path. 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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Lindsberg. (1983). “Plastic-Molding Processes” Chapter 10In Processes And Materials Of Manufacture.Allyn and Bacon, Boston, pp. 393-432.
Boehringer Hans
Daquipa Mark
Jacono Bruce
Jerome Jeremy
Morrison & Foerster / LLP
Nguyen Bao-Thuy L.
Quidel Corporation
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