TIME-TEMPERATURE INDICATOR
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United States of America Patent
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Issued Date -
Dec 8, 2022
app pub date -
Nov 10, 2020
filing date -
Nov 10, 2020
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Abstract
The present invention relates to a visual time-temperature indicator which comprises a first and a second element each comprising a hydrogel, wherein said first element further comprises at least one alkalinizing agent, and said second element comprising further at least one food colouring.
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