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:
Nov. 06, 2012
Filed:
Sep. 10, 2009
Tom Kavassalis, Oakville, CA;
Peter M. Kazmaier, Mississauga, CA;
Gabriel Iftime, Mississauga, CA;
Kentaro Morimitsu, Mississauga, CA;
Adela Goredema, Mississauga, CA;
Tom Kavassalis, Oakville, CA;
Peter M. Kazmaier, Mississauga, CA;
Gabriel Iftime, Mississauga, CA;
Kentaro Morimitsu, Mississauga, CA;
Adela Goredema, Mississauga, CA;
Xerox Corporation, Norwalk, CT (US);
Abstract
A method for determining whether an item has been exposed to an environmental condition during a monitoring period. The method includes placing a sensor at least in proximity to the item at the beginning of the monitoring period so that the sensor will be exposed to a level of an environmental condition that can be correlated to an exposure level of the item to the environmental condition; reading the sensor; and determining from reading the sensor whether the item has been exposed to the environmental condition. The sensor includes a detecting material comprising a photochromic or photothermochromic material, the detecting material selected so that upon exposure to the environmental condition the detecting material exhibits a detectable color change.