Patent US6765182B2 successfully refreshed from Google Patents.
US6765182B2
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US
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Patterned microwave susceptor
Assignee: Graphic Packaging International LLC
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Filing: 2002-04-09
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Granted: 2004-07-20
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Expires: 2022-04-09
Abstract
Abstract The heating effect of a microwave susceptor can be improved by providing a pattern of microwave transparent areas in the susceptor. The transparent areas are preferably circles having a diameter of about 0.5 inch. The distance between adjacent circles is preferably about 0.5 inch. The susceptor may be used to brown and crispen the crust of frozen pizza heated in a microwave oven. The crust of the pizza is browner, especially at its central area, than the crust of pizza heated using a conventional susceptor.
Inventors
- 👤 Lorin R. Cole
- 👤 Terrence P. Lafferty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:14
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; H; H05; H05B; H05B6/00; H05B6/64; H05B6/647; H05B6/6491; H05B6/6494; B65D2581/00; B65D2581/34; B65D2581/3401; B65D2581/3402; B65D2581/3405; B65D2581/3406; B65D2581/3437; B65D2581/3439; B65D2581/344; B65D2581/3463; B65D2581/3467; B65D2581/3471; B65D2581/3472; B65D2581/3486; B65D2581/3494
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
93 words
A microwave susceptor comprising: a dimensionally stable substrate; a plastic film supported by the dimensionally stable substrate; and an electrically continuous metal layer deposited on the lastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat; the metal layer defining a plurality of apertures within the metal layer only; wherein each of the plurality of apertures has a major linear dimension of about one-eighth an operating wavelength of a microwave oven; and each of the plurality of apertures is spaced apart from the others.
Claim 2
Dependent Claim
93 words
A microwave susceptor comprising: a dimensionally stable substrate; a plastic film supported by the dimensionally stable substrate; and an electrically continuous metal layer deposited on the lastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat; the metal layer defining a plurality of apertures within the metal layer only; wherein each of the plurality of apertures has a major linear dimension of about one-eighth an operating wavelength of a microwave oven; and each of the plurality of apertures is spaced apart from the others.
Claim 3
Dependent Claim
101 words
A microwave susceptor comprising: a dimensionally stable substrate; a plastic film supported by the dimensionally stable substrate; and an electrically continuous metal layer deposited on the plastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat; the metal layer defining a plurality of apertures within the metal layer only; wherein each of the plurality of apertures is spaced apart from the others; and each of the plurality of apertures increases the heat generated by the metal layer in an area immediately adjacent to the perimeter of each of the plurality of apertures.
Claim 4
Dependent Claim
101 words
A microwave susceptor comprising: a dimensionally stable substrate; a plastic film supported by the dimensionally stable substrate; and an electrically continuous metal layer deposited on the plastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat; the metal layer defining a plurality of apertures within the metal layer only; wherein each of the plurality of apertures is spaced apart from the others; and each of the plurality of apertures increases the heat generated by the metal layer in an area immediately adjacent to the perimeter of each of the plurality of apertures.
Claim 5
Dependent Claim
49 words
The microwave susceptor of claim 1 or 2 , wherein each of the plurality of apertures is formed as a closed geometrical figure selected from the group consisting of: a polygon, a regular polygon, a circle, an ellipse, a square, a rectangle, a hexagon, a star, and a cross.
Claim 6
Dependent Claim
25 words
The microwave suscept or of claim 3 , wherein the closed geometrical figure has an aspect ratio between 1 to 1 and 2 to 1.
Claim 7
Dependent Claim
17 words
The microwave susceptor of claim 1 or 2 , wherein the apertures are distributed across the susceptor.
Claim 8
Dependent Claim
19 words
The microwave susceptor of claim 1 or 2 wherein the metal layer is adhered to the dimensionally stable substrate.
Claim 9
Dependent Claim
22 words
The microwave susceptor of claim 1 or 2 , wherein the apertures are more concentrated toward a center region of the susceptor.
Claim 10
Dependent Claim
15 words
The microwave susceptor of claim 1 or 2 , wherein the metal layer comprises aluminum.
Claim 11
Dependent Claim
99 words
A microwave susceptor comprising: a dimensionally stable substrate; a plastic film supported by the dimensionally stable substrate; and an electrically continuous metal layer deposited on the plastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat; the metal layer defining a plurality of microwave inactive areas within the metal layer only; wherein each of the plurality of microwave inactive areas fins a major linear dimension of about one-eighth an operating wavelength of a microwave oven; and each of the plurality of microwave inactive areas is spaced apart from the others.
Claim 12
Dependent Claim
99 words
A microwave susceptor comprising: a dimensionally stable substrate; a plastic film supported by the dimensionally stable substrate; and an electrically continuous metal layer deposited on the plastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat; the metal layer defining a plurality of microwave inactive areas within the metal layer only; wherein each of the plurality of microwave inactive areas fins a major linear dimension of about one-eighth an operating wavelength of a microwave oven; and each of the plurality of microwave inactive areas is spaced apart from the others.
Claim 13
Dependent Claim
109 words
A microwave susceptor comprising: a dimensionally stable substrate; a plastic film supported by the dimensionally stable substrate; and an electrically continuous metal layer deposited on the plastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat; the metal layer defining a plurality of microwave inactive areas within the metal layer only; wherein each of the plurality of microwave inactive areas is spaced apart from the others; and each of the plurality of microwave inactive areas increases the heat generated by the metal layer in an area immediately adjacent to the perimeter of each of the plurality of microwave inactive areas.
Claim 14
Dependent Claim
109 words
A microwave susceptor comprising: a dimensionally stable substrate; a plastic film supported by the dimensionally stable substrate; and an electrically continuous metal layer deposited on the plastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat; the metal layer defining a plurality of microwave inactive areas within the metal layer only; wherein each of the plurality of microwave inactive areas is spaced apart from the others; and each of the plurality of microwave inactive areas increases the heat generated by the metal layer in an area immediately adjacent to the perimeter of each of the plurality of microwave inactive areas.
Claim 15
Dependent Claim
51 words
The microwave susceptor of claim 9 or 10 , wherein each of the plurality of microwave inactive areas is formed as a closed geometrical figure selected from the group consisting of: a polygon, a regular polygon, a circle, an ellipse, a square, a rectangle, a hexagon, a star, and a cross.
Claim 16
Dependent Claim
24 words
The microwave susceptor of claim 1 , wherein the closed geometrical figure has an aspect ratio between 1 to 1 and 2 to 1.
Claim 17
Dependent Claim
18 words
The microwave susceptor of claim 9 or 10 , wherein microwave inactive areas are distributed across the susceptor.
Claim 18
Dependent Claim
20 words
The microwave susceptor of claim 9 or 10 , wherein the metal layer is adhered to the dimensionally stable substrate.
Claim 19
Dependent Claim
24 words
The microwave susceptor of claim 9 or 10 , wherein the microwave inactive areas are more concentrated toward a center region of the susceptor.
Claim 20
Dependent Claim
15 words
The microwave susceptor of claim 9 or 10 , wherein the metal layer comprises aluminum.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2007-07-20 | 2008-01-19 | 2008-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-07-20 | 2012-01-19 | 2012-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-07-20 | 2016-01-19 | 2016-07-20 | $7700.00 | Window Closed / Lapsed |