Substrate for packaging perishable goods or for application onto same and method for determining the quality of said goods
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United States of America Patent
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Jul 25, 2006
Grant Date -
N/A
app pub date -
Jan 27, 1999
filing date -
Jan 28, 1998
priority date (Note) -
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Abstract
The invention relates to a substrate for packaging of or for attachment to products which are sensitive to aging and temperature, having a planar time-temperature integrator comprising a matrix and at least one reversible indicator embedded therein, which has photochromic properties on the basis of transfix reactions, arranged in the region of the substrate.
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