Ultraviolet retroreflectors
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United States of America Patent
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Oct 29, 2013
Grant Date -
Apr 7, 2011
app pub date -
Jun 1, 2009
filing date -
May 30, 2008
priority date (Note) -
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Abstract
A waveband selective retroreflective article, comprising a body layer having a plurality of concave retroreflective elements, each said concave retroreflective element forming a cavity having open-face surfaces and an additional layer that includes particles of a wave-band selective material.
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