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:
Mar. 07, 1978
Filed:
May. 31, 1977
Applicant:
Inventors:
Ulrich C Geissler, Cary, IL (US);
William J Stith, Mundelein, IL (US);
Kathleen J Jewett, Waukegan, IL (US);
Assignee:
Baxter Travenol Laboratories, Inc., Deerfield, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
2323 / ; 252408 ;
Abstract
An improved technique for determining the presence of hemoglobin, having increased sensitivity, is provided by bringing the material to be tested into contact with an acidic solution of tetramethylbenzidine and hydrogen peroxide to form a mixture, allowing said mixture to stand for a predetermined period of time, and thereafter examining the mixture for the presence of a colored complex indicative of the presence of hemoglobin. Organic acid is present in a concentration generally of at least 30 percent by volume, to provide a pH of no more than about 2.