Thermal history indicators

Signals and indicators – Indicators – Chemically activated type

Reexamination Certificate

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Details

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.

REFERENCES:
patent: 2020676 (1935-11-01), Ellis et al.
patent: 2216127 (1940-10-01), McNaught
patent: 2340337 (1944-02-01), McNaught
patent: 2553369 (1951-05-01), Hoffman
patent: 2955942 (1960-10-01), Fenity et al.
patent: 2971852 (1961-02-01), Schulein
patent: 3591810 (1971-07-01), Jackson
patent: 3822189 (1974-07-01), Tornmarck
patent: 3967579 (1976-07-01), Seiter
patent: 4022149 (1977-05-01), Berger
patent: 4057029 (1977-11-01), Seiter
patent: 4179397 (1979-12-01), Rohowetz et al.
patent: 4280441 (1981-07-01), McNeely
patent: 4382700 (1983-05-01), Youngren
patent: 4390291 (1983-06-01), Gaven et al.
patent: 4408557 (1983-10-01), Bradley et al.
patent: 4729671 (1988-03-01), Asano et al.
patent: 4753188 (1988-06-01), Schmoegner
patent: 5085802 (1992-02-01), Jalinski
patent: 5182212 (1993-01-01), Jalinski
patent: 5325721 (1994-07-01), Pendergrass
patent: 5667303 (1997-09-01), Arens et al.
patent: 5709472 (1998-01-01), Prusik et al.
patent: 5756356 (1998-05-01), Yanagi et al.
patent: 6029601 (2000-02-01), Suya
patent: 6103351 (2000-08-01), Ram et al.
patent: 6198701 (2001-03-01), De Jonghe et al.
patent: EP 0803718 (1997-03-01), None
patent: EP 0250217 (1987-12-01), None
patent: WO 8707373 (1987-12-01), None
patent: WO 9109287 (1991-06-01), None
patent: WO 9214998 (1992-03-01), None

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