US3845266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave cooking utensil
Assignee: Raytheon Co
•
Filing: 1973-07-09
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Granted: 1974-10-29
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Expires: 1993-07-09
Abstract
Abstract A utensil is disclosed for microwave cooking including a load supporting means of a nonpermeable nondissipative material having a plurality of frequency responsive impedance matching energy transparent structures to expose a load to varying degrees of heating. Exterior load surfaces are differentially heated to achieve a browned and seared appearance in the areas of intense heating. Numerous configurations include slots, holes and slots, rectangular and diamond shaped openings. A body member having an energy transparent low loss region is provided to space the load from the oven enclosure conductive walls. A conductive cover is included in an alternative embodiment to enhance browning and searing.
Inventors
- 👤 P Derby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6426; H05B6/647; H05B6/6491; H05B6/6494; H05B6/66; H05B6/68; H05B6/688; H05B6/70; H05B6/705; H05B6/72; H05B6/725; Y; Y02; Y02B; Y02B40/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
68 words
In combination: an enclosure; means for energizing said enclosure with microwave electromagnetic energy; energy coupling means for supporting a load within said enclosure; said load supporting means comprising a means of a nonpermeable, nondissipative material having a plurality of spaced energy transmission structures arranged to provide areas of high energy penetration with substantially no attenuation to cause elevated temperatures to heat the load material exposed to said areas.
Claim 2
Dependent Claim
68 words
In combination: an enclosure; means for energizing said enclosure with microwave electromagnetic energy; energy coupling means for supporting a load within said enclosure; said load supporting means comprising a means of a nonpermeable, nondissipative material having a plurality of spaced energy transmission structures arranged to provide areas of high energy penetration with substantially no attenuation to cause elevated temperatures to heat the load material exposed to said areas.
Claim 3
Dependent Claim
30 words
The combination according to claim 1 wherein said energy transmission structures comprise frequency responsive energy transparent areas arranged in a predetermined array in a major portion of said supporting means.
Claim 4
Dependent Claim
15 words
The combination according to claim 1 wherein said structures comprise perforations in said supporting means.
Claim 5
Dependent Claim
15 words
The combination according to claim 1 wherein said structures comprises slots in said supporting means.
Claim 6
Dependent Claim
20 words
The combination according to claim 1 wherein said structures comprise a circular opening and slot arrangement in said supporting means.
Claim 7
Dependent Claim
19 words
The combination according to claim 1 wherein said structures comprise openings having a rectangular configuration in said supporting means.
Claim 8
Dependent Claim
20 words
The combination according to claim 1 wherein said structures comprise openings having a diamond shaped configuration in said supporting means.
Claim 9
Dependent Claim
59 words
A utensil for cooking with microwave heating apparatus comprising: a body member having a microwave energy transparent low loss region; and a load supporting surface of a nontransparent, nondissipative material having a plurality of spaced frequency responsive impedance matching energy transmission structures arranged in an array to provide a transparency to couple said energy in a predetermined heating pattern.
Claim 10
Dependent Claim
59 words
A utensil for cooking with microwave heating apparatus comprising: a body member having a microwave energy transparent low loss region; and a load supporting surface of a nontransparent, nondissipative material having a plurality of spaced frequency responsive impedance matching energy transmission structures arranged in an array to provide a transparency to couple said energy in a predetermined heating pattern.
Claim 11
Dependent Claim
15 words
A utensil according to claim 8 wherein said supporting surface is of a metallic composition.
Claim 12
Dependent Claim
17 words
A utensil according to claim 8 wherein said body member energy transparent region comprises a dielectric material.
Claim 13
Dependent Claim
31 words
A utensil according to claim 8 wherein said supporting surface comprises a grille including interconnected elongated metal rods having predetermined spacings for maximum energy transmission at the microwave apparatus operating frequency.
Claim 14
Dependent Claim
35 words
A utensil according to claim 8 wherein said supporting surface comprises a slotted metallic plate member with the slot dimensions and spacings being determined to provide maximum energy transmission at the microwave apparatus operating frequency.
Claim 15
Dependent Claim
38 words
A utensil according to claim 8 wherein said supporting surface comprises a metallic plate member haviNg a plurality of slots with the dimensions and spacings being determined to provide maximum energy transmission at the microwave apparatus operating frequency.
Claim 16
Dependent Claim
22 words
A utensil according to claim 8 and a cover of a metallic material to enclose a load disposed on said supporting surface.
References Cited (Backward Citations)
US3271552A
Cited
US3490580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |