Patent US3181535A successfully refreshed from Google Patents.
US4122324A
Expired / Lapsed
US
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Shielding device for microwave cooking
Assignee: Teckton Inc
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Filing: 1977-01-05
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Granted: 1978-10-24
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Expires: 1997-01-05
Abstract
Abstract A disposable microwave shielding device for use in connection with controlled microwave heating of foods is formed from a dielectric sheet which is covered, on one surface, with a conductive sheet or film. The other surface of the sheet is covered or coated with a sheet or film of high temperature, burn-resistant material. The laminate or sandwich effectively precludes combustion of the dielectric sheet which might otherwise occur during heating by isolating the dielectric material from the air.
Inventors
- 👤 Stephen A. Falk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:43
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; B65D81/3453; B65D2581/00; B65D2581/34; B65D2581/3437; B65D2581/3486; B65D2581/3489
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
A shielding package for use in the controlled heating of foods by microwave energy comprising: a container formed from a dielectric sheet of material, said container having inner and outer surfaces; one of said inner or outer surfaces being provided with a film of conductive material, opaque to microwave energy, said film covering the full area of said surface; the other of said surfaces being coated with a heat-resistant, high temperature film over its entire surface; said container having, in its assembled state, at least one aperture formed therein to selectively control the extent of microwave energy which passes into the container.
Claim 2
Dependent Claim
102 words
A shielding package for use in the controlled heating of foods by microwave energy comprising: a container formed from a dielectric sheet of material, said container having inner and outer surfaces; one of said inner or outer surfaces being provided with a film of conductive material, opaque to microwave energy, said film covering the full area of said surface; the other of said surfaces being coated with a heat-resistant, high temperature film over its entire surface; said container having, in its assembled state, at least one aperture formed therein to selectively control the extent of microwave energy which passes into the container.
Claim 3
Dependent Claim
20 words
A shielding package as defined in claim 1 wherein said high temperature, heat resistant film is electrically and thermally conductive.
Claim 4
Dependent Claim
34 words
A shielding package as defined in claim 1 wherein the inner surface of the container is provided with said film of conductive material and wherein the outer surface is coated with a non-conductive material.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |