Patent US4496815A successfully refreshed from Google Patents.
US4496815A
Expired / Lapsed
US
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Microwave browning utensil
Assignee: NORTHLAND ALUMINUM PRODUCTS INC A CORP OF MINN
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Filing: 1983-01-14
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Granted: 1985-01-29
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Expires: 2003-01-14
Abstract
Abstract A utensil for preparing food in a microwave oven. The utensil is provided with a ferritic-silicone coating upon a metal platter, which ferritic coating is covered by a silicone coating to prevent entry of air to the ferrite which would otherwise result in oxidation and degradation of the microwave heating properties of the ferrite. The metal platter rests upon and within a housing made of a material which is highly transmissive of microwaves and having a very low absorbence of microwave energy so that it remains cool. The housing serves to insulate the platter electrically and thermally from its surroundings.
Inventors
- 👤 Jorgen A. Jorgensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:21
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/02; A47J36/027; Y; Y10; Y10S; Y10S99/00; Y10S99/15
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
A cooking utensil for use in a microwave oven environment which comprises a metal platter having a top surface suitable for holding a food product to be cooked and having a bottom surface, a continuous layer of ferritic material of generally uniform thickness bonded to the bottom surface of the metal platter, an air and moisture proof layer of organic material of high molecular weight covering completely the layer of ferritic material and extending therebeyond onto said bottom surface of said metal platter, and a housing of microwave transmissive material extending beneath and to the sides of the metal platter in supporting contact with the platter solely about the periphery of said platter.
Claim 2
Dependent Claim
113 words
A cooking utensil for use in a microwave oven environment which comprises a metal platter having a top surface suitable for holding a food product to be cooked and having a bottom surface, a continuous layer of ferritic material of generally uniform thickness bonded to the bottom surface of the metal platter, an air and moisture proof layer of organic material of high molecular weight covering completely the layer of ferritic material and extending therebeyond onto said bottom surface of said metal platter, and a housing of microwave transmissive material extending beneath and to the sides of the metal platter in supporting contact with the platter solely about the periphery of said platter.
Claim 3
Dependent Claim
29 words
The subject matter of claim 1 wherein the layer of ferritic material further comprises particles of ferromagnetic material within a matrix of organic material of a high molecular weight.
Claim 4
Dependent Claim
17 words
The subject matter of claim 2 wherein the organic high molecular weight material is a silicone material.
Claim 5
Dependent Claim
15 words
The subject matter of claim 2 wherein the ferromagnetic material is a magnetic iron oxide.
Claim 6
Dependent Claim
17 words
The subject matter of claim 2 wherein the magnetic iron oxide is Fe 2 O 3 .
Claim 7
Dependent Claim
20 words
The subject matter of claim 2 wherein the metal platter is generally planar and has a surrounding upwardly extending lip.
Claim 8
Dependent Claim
47 words
The subject matter of claim 6 wherein the housing side wall is spaced outwardly from the upwardly extending lip of the metal platter by a distance in the range of between two-tenths inch and three-tenths inch and completely surrounds the peripheral edge of said upwardly extending lip.
Claim 9
Dependent Claim
37 words
The subject matter of claim 7 wherein the air and moisture proof layer is spaced upwardly in a non-contact relation from the housing bottom by a distance in the range of between one-half inch and one inch.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |