Chemistry: analytical and immunological testing – Involving an insoluble carrier for immobilizing immunochemicals – Carrier is inorganic
Reexamination Certificate
2007-11-20
2007-11-20
Nguyen, Bao-Thuy L. (Department: 1641)
Chemistry: analytical and immunological testing
Involving an insoluble carrier for immobilizing immunochemicals
Carrier is inorganic
C435S007100, C435S007200, C435S007500, C435S007930, C435S007940, C435S174000, C435S969000, C435S973000, C436S518000, C436S519000, C436S523000, C436S524000, C436S525000, C436S526000, C436S533000, C436S534000, C436S823000
Reexamination Certificate
active
10695297
ABSTRACT:
A competitive immunoassay, dye and method for rapidly detecting the presence of one or more target ligands within a fluid sample suspected of containing such ligand or ligands. The immunoassay comprises a protein-binding membrane, a first absorbent pad, a second absorbent pad, and a third absorbent pad. The protein-binding membrane has at least two regions of antibodies bound thereto for detecting dissimilar ligands. The second absorbent pad has formed therein a colloidal gold tracer having one, and preferably two or more ligand analog protein complexes adhering thereto. To utilize the system, the immunoassay strip is placed within a fluid sample. To the extent the target ligand is absent, a visual indicator will be provided signaling such absence. To the extent the target ligand is present at or above a threshold level, no such visual signal will be produced.
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Chung Roy
Shozi June
Microdiagnostics, Inc.
Nguyen Bao-Thuy L.
Stetina Brunda Garred & Brucker
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