Electric heating – Metal heating – Of cylinders
Patent
1989-03-22
1990-06-12
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1055F, 219506, 426 88, 426243, 116216, 374161, 374149, H05B 680, G01K 1116
Patent
active
049335251
ABSTRACT:
A reusable microwaveable container having a temperature indicator mounted permanently to the side walls of the container. The temperature indicator is a liquid crystal film display device having a plurality of display devices which indicate various temperature levels. The liquid crystal films change color in response to a preset temperature such that each display changes color at incrementally increasing temperatures. The displays are reversible in that they return to their original color as the temperature decreases. Alternately, or additionally, the temperature sensing indicator may be provided on a closure lid which fits over the container, so that the temperature may be detected from steam rising from the food being cooked or heated.
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patent: 3782195 (1974-01-01), Meek et al.
patent: 3991615 (1976-11-01), Hornung
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patent: 4335181 (1982-06-01), Marano, Jr. et al.
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patent: 4410493 (1983-10-01), Joslyn
patent: 4428321 (1984-01-01), Arens
patent: 4786773 (1988-11-01), Keefer
Leung Philip H.
McKillop Alexander J.
Mlotkowski Michael J.
Mobil Oil Corporation
Speciale Charles J.
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