Radiant energy – Luminophor irradiation – With ultraviolet source
Reexamination Certificate
2005-03-08
2005-03-08
Evans, F. L. (Department: 2877)
Radiant energy
Luminophor irradiation
With ultraviolet source
C356S317000, C356S417000
Reexamination Certificate
active
06864489
ABSTRACT:
A method of detecting wear on a substrate including coating a composition that includes a fluorescent compound on the surface of a first substrate, exposing the coated surface to wear, exposing the coated surface to radiation capable of exciting the fluorescent compound, and detecting the presence or absence of fluorescence.
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Chen Yen Lane
Williamson Gary S.
3M Innovative Properties Company
Edman Sean J.
Evans F. L.
Geisel Kara
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