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:
Aug. 04, 2026
Filed:
Dec. 28, 2022
Applicant:
Hach Company, Loveland, CO (US);
Inventor:
Douglas Royer, Gilbert, IA (US);
Assignee:
HACH COMPANY, Loveland, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/78 (2006.01); G01N 33/18 (2006.01);
U.S. Cl.
CPC ...
G01N 21/78 (2013.01); G01N 33/18 (2013.01);
Abstract
A reagent for chlorine analysis includes N,N-diethyl-p-phenylenediamine (DPD), an inorganic chloride salt at a concentration of 0.5 M or more, and water. Additionally, a method for detecting chlorine in an aqueous sample includes subjecting a test sample to photometry. The test sample includes the aqueous sample; and a DPD reagent that includes DPD, an inorganic chloride salt at a concentration of 0.5 M or more, and water. The reagent and detection method can be used with minimal or no strong acids.
Royer, Douglas. (2026). Stabilized n,n-diethyl-p-phenylenediamine solution and method for detecting chlorine (U.S. Patent No. 12699054). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12699054
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile