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:
May. 29, 2018
Filed:
Apr. 11, 2016
Applicant:
University of Dayton, Dayton, OH (US);
Inventor:
Robert E. Kauffman, Centerville, OH (US);
Assignee:
University of Dayton, Dayton, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 3/14 (2006.01);
U.S. Cl.
CPC ...
G01M 3/14 (2013.01); F16L 2201/30 (2013.01);
Abstract
A persistent color change liquid indicator includes a backing layer, a penetration layer, and a reaction layer. The backing layer has an indication color. The penetration layer includes a liquid structure to allow a liquid to travel through the penetration layer to the reaction layer. The penetration layer is opaque when dry and translucent when exposed to the liquid is to allow the indication color to be visible. The reaction layer reacts to the presence of the liquid such that the visibility of the indication color persists after exposure to the liquid ceases.