Polymeric sheet having oriented multilayer interference thin film flakes therein, product using the same and method
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United States of America Patent
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Jun 13, 1995
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N/A
app pub date -
Feb 4, 1994
filing date -
Feb 4, 1994
priority date (Note) -
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Abstract
A polymeric sheet comprising a layer of polymeric material having a first and second parallel surfaces. A plurality of oriented multilayer interference thin film flakes are disposed in the layer of polymeric material. The flakes have first and second parallel surfaces and a width and a thickness and have an aspect ratio of at least 2:1 for the width with respect to the thickness.
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