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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.:

US 12529648 B1

PDFFull Text
Date of Patent:
Jan. 20, 2026

Filed:

Feb. 14, 2023

Colored reagent complex and method of detecting a rust removing agent in metal working fluids using the same

Applicant:

Northern Technologies International Corporation, Circle Pines, MN (US);

Inventor:

Ildiko Mccloskey-Lini, Lino Lakes, MN (US);

Assignee:

Northern Technologies International Corporation, Circle Pines, MN (US);

Attorney:

Fox Rothschild LLP

Primary Examiner:

Jennifer Wecker

Assistant Examiner:

Oyeleye Alexander Alabi

Int. Cl.
CPC ...
B01L 3/00 (2006.01); B01D 15/08 (2006.01); B01F 33/302 (2022.01); B01F 33/3033 (2022.01); B01L 7/00 (2006.01); B01L 9/00 (2006.01); B21B 45/02 (2006.01); B65G 47/80 (2006.01); B82Y 20/00 (2011.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01); C12M 1/34 (2006.01); C12M 3/06 (2006.01); C12N 1/14 (2006.01); C12N 1/20 (2006.01); C12Q 1/02 (2006.01); C12Q 1/6806 (2018.01); C12Q 1/6844 (2018.01); C12Q 1/6848 (2018.01); C12Q 1/686 (2018.01); G01N 15/10 (2024.01); G01N 15/14 (2024.01); G01N 15/1433 (2024.01); G01N 21/01 (2006.01); G01N 21/17 (2006.01); G01N 21/29 (2006.01); G01N 21/62 (2006.01); G01N 21/65 (2006.01); G01N 21/75 (2006.01); G01N 30/02 (2006.01); G01N 30/30 (2006.01); G01N 30/72 (2006.01); G01N 33/543 (2006.01); G01N 33/557 (2006.01); G01N 33/574 (2006.01); G01N 33/58 (2006.01); G01N 33/92 (2006.01); G01N 35/00 (2006.01);
U.S. Cl.
CPC ...
G01N 21/01 (2013.01); G01N 21/62 (2013.01); B21B 45/0287 (2013.01); G01N 2021/1742 (2013.01); G01N 2021/757 (2013.01);
Abstract

Methods for detecting an amount of a rust removing agent in a sample are disclosed, the methods using a colored reagent complex formed from a reaction of a transition metal salt and a salicylate salt or acid, or a derivative thereof. A method includes making a test sample solution comprising the sample and the colored reagent complex, evaluating the visible color and/or absorption value of the test sample solution, and comparing the visible color and/or absorption value of the test sample solution to the visible color and/or absorption value of a reference solution containing a known amount of rust removing agent.

Find Patent Forward Citations

Mccloskey-Lini, Ildiko. (2026). Colored reagent complex and method of detecting a rust removing agent in metal working fluids using the same (U.S. Patent No. 12529648). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12529648

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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