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:
Apr. 30, 2002
Filed:
Mar. 20, 2000
Applicant:
Inventors:
Joel S. Douglas, Santa Clara, CA (US);
Karen R. Drexler, Los Altos Hills, CA (US);
Assignee:
Amira Medical, Scotts Valley, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12Q 1/28 ; C12Q 1/26 ; C12Q 1/54 ;
U.S. Cl.
CPC ...
C12Q 1/28 ; C12Q 1/26 ; C12Q 1/54 ;
Abstract
A dry chemistry dye indicator composition provides improved shelf life, stable color indication end point and capability for a system at near normal pH. The novel dry chemistry dye indication system comprises 3-Methyl-6-(sodium sulfonate)-benzothiazolinone-(2)-hydrazone (MBTH-S). A preferred dye systems are based on the dye couple (MBTH-S) and 8-anilino-1-naphthalenesulfonate (ANS), and the dye couple MBTH-S and N-(3-sulfopropyl)analine. These dye indicator systems are used in conventional blood chemistry test strips and are particularly preferred for indication of glucose in blood.