UV and thermal guard
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United States of America Patent
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Jul 17, 2012
Grant Date -
Sep 13, 2007
app pub date -
Oct 16, 2006
filing date -
Mar 7, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An image element having an imperceptible message that becomes readily apparent when the image element is exposed to an excessive amount of heat and/or UV radiation is provided. The image element may be associated with a material such that, upon becoming readily apparent, the imperceptible message provides a warning that the material has been exposed to excessive heat and/or UV radiation.
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