Thermochromic indicator
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United States of America Patent
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Dec 16, 2014
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app pub date -
Dec 11, 2009
filing date -
Dec 11, 2008
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Abstract
A thermochromic indicator includes a coating on the substrate. The coating comprising a solid crystalline particles having a melting point of 0-130° C. At temperatures below the melting point, the coating is opaque. At temperatures above the melting point, the coating becomes translucent. The change in opacity can be reversible or irreversible.
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