Systems and methods for determining doneness of microwave-heated bodies
US4786773A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1986 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Dec 18, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.