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:
Apr. 30, 2019
Filed:
Nov. 16, 2016
Applicant:
Raytheon Company, Waltham, MA (US);
Inventors:
William J. Wolfgong, Little Elm, TX (US);
Stephen T. Fasolino, McKinney, TX (US);
Assignee:
RAYTHEON COMPANY, Waltham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 31/22 (2006.01); G01N 21/78 (2006.01); G01N 31/00 (2006.01); G01N 21/75 (2006.01);
U.S. Cl.
CPC ...
G01N 31/22 (2013.01); G01N 21/78 (2013.01);
Abstract
A method for testing for the presence of a trivalent chromium conversion coating on a metal substrate is provided. According to one embodiment, the method comprises contacting a surface of the metal substrate with at least one solvent to generate a test solution, adding an indicator capable of detecting zirconium to the test solution in an amount sufficient to induce a color change of the test solution if zirconium is present in the test solution, and determining whether a color change indicating the presence of the conversion coating occurs in the test solution.