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:
Dec. 13, 2005
Filed:
Mar. 17, 2004
Geoff E. Fair, Centerville, OH (US);
Triplicane A. Parthasarathy, Beavercreek, OH (US);
Ronald J. Kerans, Yellow Springs, OH (US);
Geoff E. Fair, Centerville, OH (US);
Triplicane A. Parthasarathy, Beavercreek, OH (US);
Ronald J. Kerans, Yellow Springs, OH (US);
The United States of America as represented by the Secretary of the Air Force, Washington, DC (US);
Abstract
An improved thermal history sensor having multiple glass ceramic substrates with unique compositions is disclosed. By positioning the sensor adjacent to a component subject to thermal stressors, each of the glass ceramic substrates react with a different rate of nucleation and crystal growth and thus yield a specific measure of opacity. By comparing these values representing the opacity for each glass ceramic substrate, or thermal history fingerprint, to baseline data, information about the expected remaining useful lifetime of the component may be obtained.