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:
Jun. 23, 1992
Filed:
Jan. 25, 1990
Timothy M Coryn, Mishawaka, IN (US);
Arthur L Lau, Granger, IN (US);
Carrie A Ritucci, Elkhart, IN (US);
David W Thompson, Elkhart, IN (US);
Miles Inc., Elkhart, IN (US);
Abstract
A test device and method of determining the presence and concentration of proteins, including albumin and Bence Jones proteins, in a test sample are disclosed. The test device includes a test pad comprising a new and improved carrier matrix incorporating an indicator reagent composition capable of interacting with proteins to produce a visually or instrumentally detectable and/or measurable response. The new and improved carrier matrix of the test pad comprises a fibrous, bibulous substrate, such as filter paper, homogeneously impregnated with a polymerized urethane-based compound dispersed in a liquid vehicle comprising an aprotic solvent and an alcohol. The resulting non-greening carrier matrix provides improved color resolution and increased sensitivity to proteins in dry phase test strip assays, thereby affording a more accurate and trustworthy protein assay of liquid test samples, such as urine. The non-greening carrier matrix also essentially eliminates indicator reagent composition runover onto adjacent test pads, such as a pH test pad, in test strips used to assay for more than one analyte. Also disclosed is a method of making the device.