US4486640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooker/baker utensil for microwave oven
Assignee: Raytheon Co
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Filing: 1982-11-01
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Granted: 1984-12-04
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Expires: 2002-11-01
Abstract
Abstract A utensil for cooking or baking in a microwave oven. The utensil includes a partitioned tray and cover which are held in substantially fixed horizontal alignment by a microwave transparent base. The tray and cover are metallic and shield the interior there defined from microwave energy. A ferrite layer on the underside of the tray absorbs microwave energy to provide heat which conducts through the tray to the cooking compartments. The utensil can be used to fry and bake different foods simultaneous without intermixing the respective juices. Apertures in the cover provide for the escape of steam from the interior of the utensil.
Inventors
- 👤 Robert F. Bowen
- 👤 Thomas J. Martel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:12
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/647; H05B6/6491; H05B6/6494; Y; Y10; Y10S; Y10S99/00; Y10S99/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
172 words
A utensil adapted for baking individual food bodies in a microwave oven, comprising: a metallic pan having a bottom and highly thermoconductive partitions separating said food bodies into respective compartments; a layer comprising ferrite bonded to the underside of said bottom of said pan, said layer absorbing microwave energy to provide heat for conducting through said bottom and said partitions to enter the sides of said food bodies; a microwave transparent base for supporting said pan in an elevated position in said oven, said base contacting a peripheral region of said pan spaced from said layer; a metallic cover supported by said base, said cover and said pan being positioned in substantially fixed horizontal alignment with respect to each other wherein a gap is defined between substantially parallel surfaces, said surfaces being the outer perimeter of said pan and a region of the inner surface of said cover; and said cover having at least one aperture for venting steam from the interior defined by the combination of said pan and said cover.
Claim 2
Dependent Claim
172 words
A utensil adapted for baking individual food bodies in a microwave oven, comprising: a metallic pan having a bottom and highly thermoconductive partitions separating said food bodies into respective compartments; a layer comprising ferrite bonded to the underside of said bottom of said pan, said layer absorbing microwave energy to provide heat for conducting through said bottom and said partitions to enter the sides of said food bodies; a microwave transparent base for supporting said pan in an elevated position in said oven, said base contacting a peripheral region of said pan spaced from said layer; a metallic cover supported by said base, said cover and said pan being positioned in substantially fixed horizontal alignment with respect to each other wherein a gap is defined between substantially parallel surfaces, said surfaces being the outer perimeter of said pan and a region of the inner surface of said cover; and said cover having at least one aperture for venting steam from the interior defined by the combination of said pan and said cover.
Claim 3
Dependent Claim
19 words
The utensil recited in claim 1 wherein said pan has a substantially circular shape and said partitions project radially.
Claim 4
Dependent Claim
21 words
The utensil recited in claim 2 wherein said layer is omitted from a central region of said underside of said pan.
Claim 5
Dependent Claim
34 words
The utensil recited in claim 1 wherein said surfaces are parallel in a direction perpendicular to the edge of said cover for a distance of approximately one-quarter of a wavelength of said microwave energy.
Claim 6
Dependent Claim
27 words
The utensil recited in claim 1 wherein said cover has a plurality of apertures spaced around a circle approximately four inches from the center of said cover.
Claim 7
Independent Claim
179 words
The method of baking individual food bodies in a microwave oven, comprising the steps of: positioning said food bodies in respective individual compartments formed in a metallic pan by substantially radial highly thermoconductive interior partitions, said pan having a ferrite layer bonded to at least a portion of the underside surface; supporting said pan on a microwave transparent base wherein said base contacts a peripheral region of said pan spaced from said layer, said pan having a substantially fixed horizontal alignment with said base; positioning a metallic cover over said pan, said cover being supported by said base wherein said cover is in a substantially fixed horizontal alignment with said base and said pan wherein a gap is defined between a peripheral region of said pan and the inner surface of said cover; and exposing said utensil to microwave energy wherein heat is generated in said layer by microwave energy absorption, said heat conducting through said pan and said partitions to said food bodies for cooking, said pan and said cover shielding said food bodies from said microwave energy.
Claim 8
Independent Claim
179 words
The method of baking individual food bodies in a microwave oven, comprising the steps of: positioning said food bodies in respective individual compartments formed in a metallic pan by substantially radial highly thermoconductive interior partitions, said pan having a ferrite layer bonded to at least a portion of the underside surface; supporting said pan on a microwave transparent base wherein said base contacts a peripheral region of said pan spaced from said layer, said pan having a substantially fixed horizontal alignment with said base; positioning a metallic cover over said pan, said cover being supported by said base wherein said cover is in a substantially fixed horizontal alignment with said base and said pan wherein a gap is defined between a peripheral region of said pan and the inner surface of said cover; and exposing said utensil to microwave energy wherein heat is generated in said layer by microwave energy absorption, said heat conducting through said pan and said partitions to said food bodies for cooking, said pan and said cover shielding said food bodies from said microwave energy.
Claim 9
Dependent Claim
30 words
The method recited in claim 6 further comprising the step of providing a vent for removing steam from the interior defined by the combination of said pan and said cover.
References Cited (Backward Citations)
US3941967A
Cited
JPS50119049A
Cited
US4003840A
Cited
US4190757A
Cited
US4166208A
Cited
US4266108A
Cited
US4398077A
Cited
US4362917A
Cited
US4317017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |