The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 1998
Filed:
Dec. 31, 1996
Joel Douglas, Santa Clara, CA (US);
Ernest Kiser, Los Altos, CA (US);
Michael F Tomasco, Cupertino, CA (US);
Remedios Dato, Pleasanton, CA (US);
Edward G Rice, Palo Alto, CA (US);
Deborah P Tuohy, Cupertino, CA (US);
Mark Maxson, San Jose, CA (US);
Zbigniew Witko, San Jose, CA (US);
Scott Segelke, Mountain View, CA (US);
Lifescan, Inc., Milpitas, CA (US);
Abstract
A multilayer reagent test strip measures the concentration of analyte in a liquid sample that is applied to it. The sample is guided to a number of assay areas arrayed along the strip, where the analyte can react with a reagent to cause a color change. Each assay area also includes an inhibitor for the color-change reaction. The inhibitor concentration increases in successive assay areas; thus, the number of areas that change color is a measure of the analyte concentration. The test strip is particularly adapted for measuring glucose in a whole blood sample. In a preferred embodiment, the sample is guided to the assay areas along a path formed by crushing selected areas of a membrane, and the assay areas are uncrushed areas of the membrane.