Marking element

Details Marking element Marking element

1993-06-25

1997-01-28

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

Composite temperature-related paramenter

116219, G01K 1106

Patent

active

055972381

ABSTRACT:
A marking element for indicating whether a pre-defined temperature condition has been maintained. The marking element comprises a first material capable of flowing above a predetermined temperature separated from a second absorbent material by a barrier layer. The first and second materials are such that when the barrier layer is punctured and the predetermined temperature is exceeded the first material flows along the second material to produce a detectable change.

REFERENCES:
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patent: 3420205 (1969-01-01), Morison
patent: 3479877 (1969-12-01), Allen et al.
patent: 3751382 (1973-08-01), Ljungberg et al.
patent: 3958528 (1976-05-01), Hill
patent: 4148272 (1979-04-01), Wetzold
patent: 4382700 (1983-05-01), Youngren
patent: 4647224 (1987-03-01), Holm et al.
patent: 4753188 (1988-06-01), Schmoegner
Derwent Abstract of DE2130926.
Derwent Abstract of EP0092034.

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