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:
Feb. 27, 1979
Filed:
Aug. 11, 1977
Applicant:
Inventors:
David A Morris, Elkhart, IN (US);
Patricia A Rupchock, Elkhart, IN (US);
Mark T Skarstedt, Elkhart, IN (US);
Assignee:
Miles Laboratories, Inc., Elkhart, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; G01N / ; C07D / ;
U.S. Cl.
CPC ...
2323 / ; 2323 / ; 2524 / ; 544 37 ; 544102 ; 544103 ; 422 56 ;
Abstract
A composition, device and method for determining the presence of a reducing agent, such as ascorbic acid, in a test sample are disclosed. The composition comprises certain thiazine and oxazine compounds which, in their oxidized state, are colored, but which become colorless when reduced by a reducing agent. The device comprises a carrier matrix incorporated with the composition, and the method comprises contacting a test sample with the composition device and observing any detectable response such as a color change.