TIME TEMPERATURE INDICATOR COMPRISING INDOLENIN BASED SPIROPYRANS
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United States of America Patent
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Issued Date -
Nov 3, 2011
app pub date -
Dec 30, 2009
filing date -
Jan 8, 2009
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Abstract
The present invention relates to time-temperature indicator (TTI) systems comprising indolenin based spiropyrans containing a cyclohexyl residue of formula (I), a method of manufacturing the time temperature indicator system, and a method of determining the time temperature history of perishable goods using the system. Moreover, the invention relates to a matrix selected from a printing ink or printing ink concentrate, paint, varnish, label, packaging material, and polymeric material comprising the system.
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