US4317017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave steamer
Assignee: Raytheon Co
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Filing: 1981-03-03
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Granted: 1982-02-23
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Expires: 2001-03-03
Abstract
Abstract A utensil for steam cooking in a microwave oven. The bottom portion of the utensil is a microwave transparent dish in which water is placed. A metal pan having a plurality of holes in the bottom is supported in the dish in a fixed horizontal alignment with the bottom spaced above the water level. A tray for holding food is positioned in the pan; the tray may be inverted to provide a second support surface configuration. A metallic cover is supported by the dish and is thereby secured in a spaced overlap alignment with the pan to substantially provide a microwave choke therebetween. The water in the dish is heated by microwave energy to provide steam which passes through the holes into the cooking region. Substantially all of the available microwave energy is absorbed by the water as the food is shielded by the combination of the pan, cover, and the choke therebetween.
Inventors
- 👤 Robert F. Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:23
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/02; A47J36/027; A47J27/00; A47J27/04
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
86 words
In combination: a microwave transparent container; a microwave reflective container having at least a portion removably positioned in said microwave transparent container, said microwave reflective container having a perforated bottom spaced from the bottom of said microwave transparent container; and a microwave reflective lid removably supported by said microwave transparent container, said lid having a region around its periphery substantially parallel to portions of said microwave reflective container for a distance of greater than 0.5 inches in a direction perpendicular to the edge of said lid.
Claim 2
Dependent Claim
86 words
In combination: a microwave transparent container; a microwave reflective container having at least a portion removably positioned in said microwave transparent container, said microwave reflective container having a perforated bottom spaced from the bottom of said microwave transparent container; and a microwave reflective lid removably supported by said microwave transparent container, said lid having a region around its periphery substantially parallel to portions of said microwave reflective container for a distance of greater than 0.5 inches in a direction perpendicular to the edge of said lid.
Claim 3
Dependent Claim
14 words
The combination in accordance with claim 1 wherein said microwave transparent container comprises polycarbonate.
Claim 4
Dependent Claim
14 words
The combination in accordance with claim 1 wherein said microwave reflective container comprises aluminum.
Claim 5
Dependent Claim
14 words
The combination in accordance with claim 1 wherein said microwave reflective lid comprises aluminum.
Claim 6
Dependent Claim
37 words
The combination in accordance with claim 1 wherein said microwave transparent container defines an inward ledge around the perimeter of its inside surface for supporting said microwave reflective container above the bottom of said microwave transparent container.
Claim 7
Dependent Claim
23 words
The combination in accordance with claim 1 said region is spaced less than 0.25 inches from said portions of said microwave reflective container.
Claim 8
Dependent Claim
146 words
A utensil for steam cooking in a microwave oven comprising: a first container having an opening, said first container being substantially transparent to microwave energy; a second container having at least a portion removably positioned in said first container, the bottom of said second container being spaced above the bottom of said first container, said bottom of said second container having a plurality of perforations, said second container being reflective to microwave energy; a cover removably supported by said first container for covering said opening, said cover being reflective to microwave energy; and means for preventing the passage of microwave energy between said second container and said cover, said means comprising a region around the periphery of said cover being substantially perpendicular to portions of said second container for a distance of greater than 0.5 inches in a direction perpendicular to the edge of said cover.
Claim 9
Dependent Claim
146 words
A utensil for steam cooking in a microwave oven comprising: a first container having an opening, said first container being substantially transparent to microwave energy; a second container having at least a portion removably positioned in said first container, the bottom of said second container being spaced above the bottom of said first container, said bottom of said second container having a plurality of perforations, said second container being reflective to microwave energy; a cover removably supported by said first container for covering said opening, said cover being reflective to microwave energy; and means for preventing the passage of microwave energy between said second container and said cover, said means comprising a region around the periphery of said cover being substantially perpendicular to portions of said second container for a distance of greater than 0.5 inches in a direction perpendicular to the edge of said cover.
Claim 10
Dependent Claim
12 words
The utensil recited in claim 7 wherein said first container comprises polycarbonate.
Claim 11
Dependent Claim
12 words
The utensil recited in claim 7 wherein said second container comprises aluminum.
Claim 12
Dependent Claim
11 words
The utensil recited in claim 7 wherein said cover comprises aluminum.
Claim 13
Dependent Claim
31 words
The utensil recited in claim 7 wherein said first container has an inward ledge around its inside perimeter surface for supporting said second container above said bottom of said first container.
Claim 14
Dependent Claim
22 words
The utensil recited in claim 7 wherein said portion is spaced less than 0.25 inches from said portions of said second container.
Claim 15
Dependent Claim
127 words
A utensil for steam cooking in a microwave oven comprising: a microwave transparent container comprising a first container having an opening, said first container being substantially transparent to microwave energy; a second container having at least a portion removably positioned in said first container, the bottom of said second container being spaced above the bottom of said first container, said bottom of said second container having a plurality of perforations, said second container being reflective to microwave energy; and a cover removably supported by said first container overlapping portions of said second container, said overlapping portions being substantially parallel around the perimeter of said lid for a distance of greater than 0.5 inches in a direction perpendicular to said perimeter, said cover being reflective to microwave energy.
Claim 16
Dependent Claim
127 words
A utensil for steam cooking in a microwave oven comprising: a microwave transparent container comprising a first container having an opening, said first container being substantially transparent to microwave energy; a second container having at least a portion removably positioned in said first container, the bottom of said second container being spaced above the bottom of said first container, said bottom of said second container having a plurality of perforations, said second container being reflective to microwave energy; and a cover removably supported by said first container overlapping portions of said second container, said overlapping portions being substantially parallel around the perimeter of said lid for a distance of greater than 0.5 inches in a direction perpendicular to said perimeter, said cover being reflective to microwave energy.
Claim 17
Dependent Claim
12 words
The utensil recited in claim 13 wherein said first container comprises polycarbonate.
Claim 18
Dependent Claim
18 words
The utensil recited in claim 13 wherein the spacing between said parallel portions is less than 0.25 inches.
Claim 19
Dependent Claim
144 words
A utensil for steam cooking in a microwave oven comprising: a microwave transparent container comprising a bottom section comprising a bottom connected to a first surface having a vertical component; said microwave transparent container further comprising an outwardly extending substantially horizontal ledge connected to the top of said first surface; said microwave transparent container further comprising a top section comprising a second surface having a vertical component connected to the outer perimeter of said ledge; a microwave reflective container removably supported on said ledge and extending upwardly having a portion above said second surface, said microwave reflective container having a plurality of perforations in the bottom; and a microwave reflective cover removably supported by said microwave transparent container, said cover overlapping said portion, said overlapping being greater than 0.5 inches and being substantially parallel in a direction perpendicular to the perimeter of said cover.
Claim 20
Dependent Claim
144 words
A utensil for steam cooking in a microwave oven comprising: a microwave transparent container comprising a bottom section comprising a bottom connected to a first surface having a vertical component; said microwave transparent container further comprising an outwardly extending substantially horizontal ledge connected to the top of said first surface; said microwave transparent container further comprising a top section comprising a second surface having a vertical component connected to the outer perimeter of said ledge; a microwave reflective container removably supported on said ledge and extending upwardly having a portion above said second surface, said microwave reflective container having a plurality of perforations in the bottom; and a microwave reflective cover removably supported by said microwave transparent container, said cover overlapping said portion, said overlapping being greater than 0.5 inches and being substantially parallel in a direction perpendicular to the perimeter of said cover.
Claim 21
Dependent Claim
22 words
The utensil recited in claim 16 wherein said portion and said parallel region of said cover are spaced less than 0.25 inches.
Claim 22
Dependent Claim
79 words
A utensil for steam cooking in a microwave oven comprising: a microwave transparent dish having an open top; a metallic container removably supported in said dish above the bottom of said dish, said container having a plurality of perforations in the bottom; a metallic lid removably supported by said dish covering said open top; and a tray removably positioned in said container, said tray being supportable in a first position or a second position inverted from said first position.
Claim 23
Dependent Claim
79 words
A utensil for steam cooking in a microwave oven comprising: a microwave transparent dish having an open top; a metallic container removably supported in said dish above the bottom of said dish, said container having a plurality of perforations in the bottom; a metallic lid removably supported by said dish covering said open top; and a tray removably positioned in said container, said tray being supportable in a first position or a second position inverted from said first position.
Claim 24
Dependent Claim
18 words
The utensil recited in claim 18 wherein said first position provides a food support surface having a divider.
Claim 25
Dependent Claim
20 words
The utensil recited in claim 20 wherein said second position provides a food support surface shallower than said first position.
Claim 26
Dependent Claim
14 words
The utensil recited in claim 18 wherein said tray comprises a high temperature plastic.
Claim 27
Dependent Claim
33 words
The utensil recited in claim 18 wherein said tray comprises a food support surface having a plurality of elongated slots wherein two slots are at an angle other than perpendicular to each other.
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) | 1985-02-22 | 1985-08-24 | 1986-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-22 | 1989-08-24 | 1990-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-22 | 1993-08-24 | 1994-02-23 | $7700.00 | Window Closed / Lapsed |