07036452 is referenced by 9 patents and cites 32 patents.

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.

Title
Thermal history indicators
Application Number
9/913022
Publication Number
7036452 (B1)
Application Date
February 10, 2000
Publication Date
May 2, 2006
Inventor
Richard Tester
Glasgow
GB
Agent
Fleshner & Kim
Assignee
Temp Tell
GB
IPC
G01D 21/00
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