Chemistry: analytical and immunological testing – Involving an insoluble carrier for immobilizing immunochemicals – Carrier is inorganic
Reexamination Certificate
2006-03-28
2006-03-28
Chin, Christopher L. (Department: 1641)
Chemistry: analytical and immunological testing
Involving an insoluble carrier for immobilizing immunochemicals
Carrier is inorganic
C422S082050, C422S105000, C204S400000, C204S403060, C435S287100, C435S287200, C435S289100, C435S291400, C435S817000, C436S169000, C436S170000, C436S518000, C436S525000, C436S805000
Reexamination Certificate
active
07018848
ABSTRACT:
An electrochemical test device is provided for determining the presence or concentration of an analyte in an aqueous fluid sample. The electrochemical test device includes a working electrode and a counter electrode made of an amorphous semiconductor material. The working electrode is overlaid with a reagent capable of reacting with an analyte to produce a measurable change in potential which can be correlated to the concentration of the analyte in the fluid sample. The test device optionally contains a reference electrode made of an amorphous semiconductor material having a reference material on the reference electrode. The test device electrodes can be constructed on a flexible film substrate, such as a polymeric film or a metal foil coated with a non-conductive coating.
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Yokoyama, K. et al., “Amperometric Glucose Sensor Using Silicon Oxide Deposited Gold Electrodes”, Electroanalysis, May 1991.
Douglas Joel S.
Priest John H.
Roe Jeffrey N.
Chin Christopher L.
Roche Diagnostic Operations, Inc.
Woodard Emhardt Moriarty McNett & Henry LLP
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