Systems and methods for determining doneness of microwave-heated

Details Systems and methods for determining doneness of microwave-heated Systems and methods for determining doneness of microwave-heated

1986-12-18

1988-11-22

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055F, 219 1055M, 426 88, 426107, 426243, 116216, 374161, 374149, H05B 680

Patent

active

047867736

ABSTRACT:
For determining doneness of a body of food or other material heated in a microwave oven, a device including an indicator that changes appearance at a predetermined temperature, mounted on an outwardly-facing major surface of a thin-gauge metal element which is disposed in the oven so as to receive heat from the body. The metal element may be mounted on the lid or other wall of a container holding the body in the oven; the lid may be microwave-transmissive and may hold the metal element spaced above the body. The indicator may include a substance that melts at the predetemined temperature to reveal an underlying color or pattern on the metal element surface. In use, the device is placed in a microwave oven together with the body and is observed visually, for detection of the change of appearance, which occurs when the indicator reaches a temperature corresponding to adequate doneness of the body.

REFERENCES:
patent: 2490933 (1949-12-01), Tornquist et al.
patent: 3479877 (1969-11-01), Allen
patent: 3849622 (1974-11-01), Merriam
patent: 3967579 (1976-07-01), Seiter
patent: 4190757 (1980-02-01), Turpin et al.
patent: 4230924 (1980-10-01), Brastad et al.
patent: 4410493 (1983-10-01), Joslyn
patent: 4428321 (1984-01-01), Arens
patent: 4448548 (1984-05-01), Foley
patent: 4640838 (1987-02-01), Isakson et al.

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