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:
Oct. 02, 1990
Filed:
Jun. 06, 1988
Arthur L Lau, Granger, IN (US);
Miles Inc., Elkhart, IN (US);
Abstract
A new and improved method and composition for determining the presence and concentration of low to trace amounts of proteins, such as albumin, in a test sample, such as urine. The method includes using a reagent composition capable of interacting with low to trace amounts of proteins to produce a visually or instrumentally detectable and/or measurable response. The method can be used in wet assays or in dry test strip assays, wherein the reagent composition is incorporating into a carrier matrix. The new and improved reagent composition, comprising a dye, such as a polyhydroxybenzenesulfonephthalein-type indicator, like pyrocatechol violet; a tungstate, such as ammonium tungstate; and, if necessary, a suitable buffer, is incorporated into the carrier matrix to provide sufficient sensitivity to low to trace protein levels and sufficient color resolution between low to trace protein levels, thereby affording an accurate and trustworthy protein assay of test samples having a low protein concentration.