US3835280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite microwave energy perturbating device
Assignee: Pillsbury Co
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Filing: 1973-02-01
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Granted: 1974-09-10
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Expires: 1993-02-01
Abstract
Abstract For the purpose of concentrating microwave energy to a central point or other desired location in a microwave oven, a composite signal perturbating device is placed in the oven. It consists of a sheet of a low loss dielectrical material together with a layer of microwave reflecting material. The device is placed on the floor of the oven and on the opposite side of the product heated from the source of microwave energy. The low loss dielectric consists, for example, of a flat sheet of dielectric material having two sheets of aluminum foil imbedded therein as concentric rings positioned in a plane parallel to the floor of the oven chamber and spaced from about 3/4 of an inch to one inch below the product that is to be heated.
Inventors
- 👤 R Gorman
- 👤 L Gades
- 👤 L Brandberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:39
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; B65D81/3461; B65D81/3469; A; A23; A23L; A23L7/00; A23L7/10; A23L7/161; A23L7/174; A23L7/183; A23L7/187; B65D2581/00; B65D2581/34; B65D2581/3401; B65D2581/3402; B65D2581/3421; B65D2581/3437; B65D2581/3471; B65D2581/3472; B65D2581/3486; B65D2581/3489
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
A composite microwave energy perturbating device useful in concentrating microwave energy in a zone located in approximately the center thereof comprising a sheet of a low loss dielectric material of an appropriate size to fit within the oven and to rest on the bottom thereof during operation, said sheet including upper and lower substantially parallel surfaces and vertical side edges which are substantially less than the width and breadth of The sheet and a plurality of concentric rings of electrically conductive microwave reflective sheet material mounted upon the perturvating device and positioned in a plane substantially parallel to the upper surface thereof thereby concentrating the microwave energy at a point near the center of the concentric rings.
Claim 2
Dependent Claim
117 words
A composite microwave energy perturbating device useful in concentrating microwave energy in a zone located in approximately the center thereof comprising a sheet of a low loss dielectric material of an appropriate size to fit within the oven and to rest on the bottom thereof during operation, said sheet including upper and lower substantially parallel surfaces and vertical side edges which are substantially less than the width and breadth of The sheet and a plurality of concentric rings of electrically conductive microwave reflective sheet material mounted upon the perturvating device and positioned in a plane substantially parallel to the upper surface thereof thereby concentrating the microwave energy at a point near the center of the concentric rings.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1 wherein the concentric rings of said sheet material are embedded within the dielectric material in spaced relationship from both of the upper and lower surfaces thereof.
Claim 4
Dependent Claim
185 words
A microwave concentrator for facilitating the heating of food products placed within a microwave oven containing a source of microwave energy, an oven chamber and a means for supplying microwave energy from the source to the chamber, said concentrator comprising: a. a body of low loss dielectric material having a mass on the order of more than one pound and being resistant to damage by microwave energy when subjected thereto, b. said dielectric material comprising a sheet of a dielectric substance having flat upper and lower surfaces of substantial width, the height of the sheet between the upper and lower surfaces being substantially less than the width thereof, c. a sheet of conductive microwave reflective material bonded to said dielectric material, d. said sheet of conductive microwave reflective material comprising a ring-shaped endless strip of reflective material located in a plane parallel to the bottom of the oven and to the upper and lower surfaces of the dielectric sheet material, e. said microwave reflective material being bonded to the dielectric sheet and having its center located approximately in the center of the dielectric sheet material.
Claim 5
Dependent Claim
185 words
A microwave concentrator for facilitating the heating of food products placed within a microwave oven containing a source of microwave energy, an oven chamber and a means for supplying microwave energy from the source to the chamber, said concentrator comprising: a. a body of low loss dielectric material having a mass on the order of more than one pound and being resistant to damage by microwave energy when subjected thereto, b. said dielectric material comprising a sheet of a dielectric substance having flat upper and lower surfaces of substantial width, the height of the sheet between the upper and lower surfaces being substantially less than the width thereof, c. a sheet of conductive microwave reflective material bonded to said dielectric material, d. said sheet of conductive microwave reflective material comprising a ring-shaped endless strip of reflective material located in a plane parallel to the bottom of the oven and to the upper and lower surfaces of the dielectric sheet material, e. said microwave reflective material being bonded to the dielectric sheet and having its center located approximately in the center of the dielectric sheet material.
Claim 6
Dependent Claim
30 words
The concentrator of claim 3 wherein there are a plurality of said ring-shaped strips of reflective material positioned concentric with one another and each is bonded to the dielectric material.
Claim 7
Dependent Claim
35 words
The apparatus according to claim 3 wherein the microwave reflective material comprises a sheet of relatively thin metal foil lying in a plane substantially parallel to the upper and lower surfaces of the dielectric sheet.
References Cited (Backward Citations)
US3490580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |