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. 12, 1977
Filed:
Sep. 02, 1975
William J Payne, Greensburg, PA (US);
Modulus Corporation, Chagrin Falls, OH (US);
Abstract
A temperature indicator of the type wherein the heating of the indicator to a predetermined temperature produces a change in color of a visual indicator. An indicator area and a light-absorbing indicator fluid are sealed in a fluid holding member that also includes a window. The fluid holding member is fastened to the temperature indicator. At such time as the temperature indicator reaches a predetermined temperature, a portion of the sealing wall of the fluid holding member is caused to be interrupted with the result that fluid is caused to flow out of the fluid holding member thereby producing a visual indication through the window of the indicator that a high temperature limit has been reached.