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. 29, 2000
Filed:
Jul. 21, 1997
Applicant:
Inventor:
Robert A Peachey-Stoner, Chelan, WA (US);
Assignee:
Environmental Test Systems, Inc., Elkhart, IN (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
436125 ; 422 56 ; 422 61 ; 436124 ; 436164 ; 436166 ; 436169 ;
Abstract
A sensitive and convenient unitized method, reagent composition and test device is presented for the determination of free halogens in aqueous test fluid samples. The reagent composition basically consists of an azine type indicator material and an effective amount of a benzidine type catalytic material, the combination of two materials preferably being impregnated into a matrix material for ease of handling and use.