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. 08, 1991
Filed:
Jul. 05, 1988
Arthur L Lau, Granger, IN (US);
James H Pendergrass, South Bend, IN (US);
Miles, Inc., Elkhart, IN (US);
Abstract
A new and improved composition and method of determining the specific gravity of an aqueous test sample. The method includes using a test device comprising a carrier matrix incorporating a reagent composition capable of interacting with an aqueous test sample to produce a visually or instrumentally detectable and measurable response that correlates to the specific gravity of the aqueous test sample. The new and improved reagent composition, comprising a molybdate-dye complex indicator, such as a molybdatepyrocatechol violet complex; a protein, such as albumin; a chelating agent, like tartaric acid; and, if necessary, a suitable buffer, is incorporated into a carrier matrix, like filter paper, to provide increased sensitivity to test sample specific gravity and improved color differentiation between test samples having different specific gravities, thereby affording a more accurate and trustworthy specific gravity assay of an aqueous test sample, such as urine.