Compositions – Nonreactive analytical – testing – or indicating compositions
Reexamination Certificate
2006-08-22
2006-08-22
Wu, SHean C (Department: 1756)
Compositions
Nonreactive analytical, testing, or indicating compositions
C428S064400, C428S412000, C428S913000, C428S916000, C436S056000
Reexamination Certificate
active
07094364
ABSTRACT:
In one embodiment, a method for authenticating that a test polymer is an authenticatable polymer is disclosed wherein the authenticatable polymer comprises a substrate polymer and a thermochromic compound, the thermochromic compound having a first signal at a first temperature and at an authenticating wavelength, and a second signal at an authenticating temperature and the authenticating wavelength, the first and second signals being different, and the authenticating temperature being greater than the first temperature, the method comprising subjecting the test polymer to a stimulus sufficient to raise a portion of the test polymer to the authenticating temperature to create a heated portion, determining a test signal of the heated portion of the test polymer at the authenticating wavelength, and authenticating that the test polymer is an authenticatable polymer if the test signal is the same as an authenticating signal of the authenticatable polymer.
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Potyrailo Radislav
Schottland Philippe
General Electric Company
Wu SHean C
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