Microwave container with dielectric structure of varying properties and method of using same
US4888459A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1986 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Dec 18, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S99/14
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A container for holding a body of material such as foodstuff to be heated in a microwave oven, including a dielectric lid and/or other dielectric wall structure with at least two ontiguous dielectric wall portions of respectively different electrical thickness for cooperatively modifying the microwave electric field patterns that would obtain in the body during such heating if the lid and/or other dielectric wall structure were of uniform electrical thickness or were absent. At least one of the portions, preferably the portion of higher electrical thickness, may be so constituted as to undergo a change in dielectric constant during the microwave heating, thereby to alter the heating distribution in the body as heating proceeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.