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:
Jan. 22, 2019
Filed:
Mar. 21, 2017
Applicant:
Ecolab Usa Inc., St. Paul, MN (US);
Inventor:
Hua Zheng, Aurora, IL (US);
Assignee:
Ecolab USA Inc., St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 33/18 (2006.01); G01N 31/22 (2006.01); G01N 21/77 (2006.01); G01N 21/78 (2006.01); G01N 21/25 (2006.01); G01N 21/80 (2006.01);
U.S. Cl.
CPC ...
G01N 33/182 (2013.01); G01N 21/77 (2013.01); G01N 21/78 (2013.01); G01N 21/80 (2013.01); G01N 31/22 (2013.01); G01N 21/251 (2013.01); G01N 2021/7786 (2013.01);
Abstract
The invention provides a method for measuring the concentration of anionic polymers in an industrial water system. Specifically, the concentration of anionic polymer can be measured by combining an indicator dye composition that includes an acridine compound or a salt thereof to a water sample and measuring the absorbance of the mixture. The concentration can be determined by comparing the absorbance of the mixture to absorbance values on a pre-determined calibration curve. The dosage of anionic polymer can be optionally adjusted based on the concentration.