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. 12, 2019
Filed:
Jul. 29, 2016
Applicant:
Hach Company, Loveland, CO (US);
Inventors:
Darren Kent MacFarland, Windsor, CO (US);
Brendan Easley Young, Fort Collins, CO (US);
Assignee:
HACH COMPANY, Loveland, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 31/22 (2006.01); G01N 33/18 (2006.01); G01N 21/78 (2006.01); B01J 31/24 (2006.01); C07C 323/66 (2006.01); C07D 311/82 (2006.01); B01J 31/18 (2006.01); B01J 31/28 (2006.01); B01J 31/30 (2006.01);
U.S. Cl.
CPC ...
G01N 33/182 (2013.01); B01J 31/1875 (2013.01); B01J 31/28 (2013.01); B01J 31/30 (2013.01); C07C 323/66 (2013.01); C07D 311/82 (2013.01); G01N 21/78 (2013.01); G01N 31/227 (2013.01); B01J 31/2404 (2013.01); B01J 2231/70 (2013.01); B01J 2531/64 (2013.01); B01J 2540/32 (2013.01); C07C 2603/50 (2017.05); Y10T 436/173076 (2015.01);
Abstract
A method of measuring nitrate concentration in an aqueous sample include mixing the aqueous sample with a water-soluble thioether compound including a chromophore group in the presence of a water soluble catalyst; measuring a color change, and correlating the color change to nitrate concentration.