Signals and indicators – Indicators – Chemically activated type
Reexamination Certificate
2006-05-02
2006-05-02
Gutierrez, Diego (Department: 2859)
Signals and indicators
Indicators
Chemically activated type
C116S206000, C116S216000, C374S160000
Reexamination Certificate
active
07036452
ABSTRACT:
A temperature history indicator means for affixing to goods. A temperature related phase change in a material within the indicator leads to an indication that a high temperature event has occurred. A preferred format has a water-soluble, lipid-insoluble dye immobilised within a lipid selected to have a melting point at a particular temperature and has all components made from edible materials. Upon melting, the dye dissolves in water present in a secondary phase or the goods themselves giving a visual indication. Another format has a primary reagent within a solid lipid and a secondary reagent held with a secondary phase such that melting of the lipid allows the primary reagent to react with the secondary reagent, providing an indication of a high temperature event. Time-dependent formats are also considered.
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Fleshner & Kim LLP
Gutierrez Diego
Reis Travis
Temp-Tell Limited
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