US4891482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable microwave heating receptacle and method of using same
Assignee: Stouffer Corp
•
Filing: 1988-07-13
•
Granted: 1990-01-02
•
Expires: 2008-07-13
Abstract
Abstract There is provided an improved disposable receptacle with a self-supporting configuration for combined baking and cooking of a generally flat food article, such as pizza having a given thickness, in a microwave oven, which receptacle is constructed from a sheet of microwave susceptor stock surrounding the food article and comprising an outwardly exposed, dielectric support layer, such as paperboard, and an inwardly facing heating layer of microwave interactive material allowing passage of microwave energy as it is heated thereby and further including a lower flat portion for supporting the food article during microwave heating. The improvement in this type of disposable receptacle, which is generally a self-supporting sleeve or box, includes forming the lower flat portion of the sleeve with layer means for absorbing nearly all of the microwave energy passing from the outside of the sleeve through the lower portion so that the microwave energy at the lower portion of the sleeve surrounding the food article is converted into heat to a substantially greater extent than other portions of the sleeve. The lower portion of the food product is, thus, heated primarily by conduction, while the upper portion is heated by combined radiation from the susceptor sheet and microwave absorption through the susceptor sheet and from other extraneous heat sources.
Inventors
- 👤 Kirk A. Jaeger
- 👤 Yigal Peleg
- 👤 David R. Popp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:39
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; B65D81/3453; B65D2581/00; B65D2581/34; B65D2581/3401; B65D2581/3402; B65D2581/3405; B65D2581/3406; B65D2581/3437; B65D2581/3439; B65D2581/3452; B65D2581/3471; B65D2581/3472; B65D2581/3486; B65D2581/3489; B65D2581/3494; Y; Y10; Y10S; Y10S99/00; Y10S99/14
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
152 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness and an outer peripheral shape in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor surrounding said food article stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle and having an outer peripheral shape generally at least as large as said peripheral shape of said food article whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof.
Claim 2
Dependent Claim
152 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness and an outer peripheral shape in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor surrounding said food article stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle and having an outer peripheral shape generally at least as large as said peripheral shape of said food article whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof.
Claim 3
Dependent Claim
33 words
The improvement as defined in claim 1 wherein said receptacle is a sleeve having an upper flat portion and side wall means for securing said upper and lower portions in spaced parallel relationship.
Claim 4
Dependent Claim
62 words
The improvement as defined in claim 2 wherein said side wall means include first and second walls foldable into a first collapsed, inactive position with said upper and lower flat portions of said receptacle generally folded together and a second, expanded position with said flat portions spaced from each other a distance substantially greater than said given thickness of said food article.
Claim 5
Dependent Claim
207 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion; wherein said side wall means include first and second walls foldable into a first collapsed, inactive position with said upper and lower flat portions of said receptacle generally folded together and a second, expanded position with said flat portions spaced from each other a distance substantially greater than said given thickness of said food article; and, wherein said receptacle includes downwardly extending leg means for holding said receptacle in a position spaced vertically from said lower wall of said microwave oven a general distance.
Claim 6
Dependent Claim
207 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion; wherein said side wall means include first and second walls foldable into a first collapsed, inactive position with said upper and lower flat portions of said receptacle generally folded together and a second, expanded position with said flat portions spaced from each other a distance substantially greater than said given thickness of said food article; and, wherein said receptacle includes downwardly extending leg means for holding said receptacle in a position spaced vertically from said lower wall of said microwave oven a general distance.
Claim 7
Dependent Claim
19 words
The improvement as defined in claim 4 wherein said general distance is in the range of about 1/8-1/2 inches.
Claim 8
Dependent Claim
20 words
The improvement as defined in claim 4 wherein said leg means include legs cut from said first sheet susceptor stock.
Claim 9
Dependent Claim
49 words
The improvement as defined in claim 4 wherein said leg means include legs movable from a first location generally planar with said first sheet stock when said walls are in said collapsed, inactive position and extending from said lower portion when said walls are in the second expanded position.
Claim 10
Dependent Claim
35 words
The improvement as defined in claim 1 wherein said receptacle includes downwardly extending leg means for holding said receptacle in a position spaced vertically from said lower wall of said microwave oven a general distance.
Claim 11
Dependent Claim
18 words
The improvement as defined in claim 8 wherein said distance is in the general range of 1/8-1/2 inches.
Claim 12
Dependent Claim
20 words
The improvement as defined in claim 8 wherein said leg means include legs cut from said first sheet susceptor stock.
Claim 13
Dependent Claim
49 words
The improvement as defined in claim 8 wherein said leg means include legs movable from a first location generally planar with said first sheet stock when said walls are in said collapsed, inactive position and extending from said lower portion when said walls are in the second expanded position.
Claim 14
Dependent Claim
29 words
The improvement as defined in claim 1 including means for holding said receptacle in a position spaced vertically from said lower wall of said microwave oven a general distance.
Claim 15
Dependent Claim
19 words
The improvement as defined in claim 12 wherein said general distance is in the range of about 1/8-1/2 inches.
Claim 16
Dependent Claim
29 words
The improvement as defined in claim 2 including means for holding said receptacle in a position spaced vertically from said lower wall of said microwave oven a general distance.
Claim 17
Dependent Claim
19 words
The improvement as defined in claim 14 wherein said general distance is in the range of about 1/8-1/2 inches.
Claim 18
Dependent Claim
24 words
The improvement as defined in claim 2 wherein said additional layer of susceptor sheet stock is integral with said first sheet of susceptor stock.
Claim 19
Dependent Claim
24 words
The improvement as defined in claim 1 wherein said additional layer of susceptor sheet stock is integral with said first sheet of susceptor stock.
Claim 20
Dependent Claim
174 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; wherein said receptacle is a sleeve having an upper flat portion and side wall means for securing said upper and lower portions in spaced parallel relationship; and, wherein said additional layer of susceptor sheet stock is a second sheet of susceptor stock discontinuous from said first sheet of susceptor stock.
Claim 21
Dependent Claim
174 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; wherein said receptacle is a sleeve having an upper flat portion and side wall means for securing said upper and lower portions in spaced parallel relationship; and, wherein said additional layer of susceptor sheet stock is a second sheet of susceptor stock discontinuous from said first sheet of susceptor stock.
Claim 22
Dependent Claim
30 words
The improvement as defined in claim 18 wherein said second sheet of susceptor stock has a surface resistivity different from the surface resistivity of said first sheet of susceptor stock.
Claim 23
Dependent Claim
32 words
The improvement as defined in claim 19 wherein the surface resistivity of said second sheet of susceptor stock is substantially less than the surface resistivity of said first sheet of susceptor stock.
Claim 24
Dependent Claim
32 words
The improvement as defined in claim 19 including means for adhering said second sheet of susceptor stock onto said first sheet of susceptor stock at said lower flat portion of said receptacle.
Claim 25
Dependent Claim
19 words
The improvement as defined in claim 1 wherein said additional layer of susceptor sheet stock is a second sheet.
Claim 26
Dependent Claim
160 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; wherein said additional layer of susceptor sheet stock is a second sheet; and, wherein said second sheet of susceptor stock has a surface resistivity different from the surface resistivity of said first sheet of susceptor stock.
Claim 27
Dependent Claim
160 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; wherein said additional layer of susceptor sheet stock is a second sheet; and, wherein said second sheet of susceptor stock has a surface resistivity different from the surface resistivity of said first sheet of susceptor stock.
Claim 28
Dependent Claim
32 words
The improvement as defined in claim 23 wherein the surface resistivity of said second sheet of susceptor stock is substantially less than the surface resistivity of said first sheet of susceptor stock.
Claim 29
Dependent Claim
32 words
The improvement as defined in claim 18 including means for adhering said second sheet of susceptor stock onto said first sheet of susceptor stock at said lower flat portion of said receptacle.
Claim 30
Dependent Claim
32 words
The improvement as defined in claim 22 including means for adhering said second sheet of susceptor stock onto said first sheet of susceptor stock at said lower flat portion of said receptacle.
Claim 31
Dependent Claim
22 words
The improvement as defined in claim 2 including means, in at least one of said side walls for permanently opening said sleeve.
Claim 32
Dependent Claim
46 words
The improvement as defined in claim 2 wherein said layers of microwave susceptor sheet stock of said lower flat portion include microwave absorption layer means for, in combination, absorbing nearly all of the microwave energy passing from outside of said receptacle through said sheet stock layers.
Claim 33
Dependent Claim
46 words
The improvement as defined in claim 1 wherein said layers of microwave susceptor sheet stock of said lower flat portion include microwave absorption layer means for, in combination, absorbing nearly all of the microwave energy passing from outside of said receptacle through said sheet stock layers.
Claim 34
Dependent Claim
163 words
In a disposable receptacle for combined baking and cooking of a generally flat food article having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a single sheet of microwave susceptor stock surrounding said food article and having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby and said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: said lower flat portion including layer means for absorbing nearly all of the microwave energy passing from the outside of said receptacle through said lower portion whereby said microwave energy at said lower portion is converted into heat to a substantially greater extent than at other portions of said receptacle; and, wherein said layer means is an additional layer of microwave susceptor sheet stock secured on said inwardly facing layer of said lower flat portion.
Claim 35
Dependent Claim
163 words
In a disposable receptacle for combined baking and cooking of a generally flat food article having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a single sheet of microwave susceptor stock surrounding said food article and having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby and said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: said lower flat portion including layer means for absorbing nearly all of the microwave energy passing from the outside of said receptacle through said lower portion whereby said microwave energy at said lower portion is converted into heat to a substantially greater extent than at other portions of said receptacle; and, wherein said layer means is an additional layer of microwave susceptor sheet stock secured on said inwardly facing layer of said lower flat portion.
Claim 36
Dependent Claim
20 words
The improvement as defined in claim 30 wherein said additional layer is integral with said sheet stock of said receptacle.
Claim 37
Dependent Claim
30 words
The improvement as defined in claim 30 wherein said additional layer of susceptor stock has a surface resistivity different from the surface resistivity of said first sheet of susceptor stock.
Claim 38
Dependent Claim
32 words
The improvement as defined in claim 32 wherein the surface resistivity of said second sheet of susceptor stock is substantially less than the surface resistivity of said first sheet of susceptor stock.
Claim 39
Dependent Claim
186 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facig heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; said receptacle is a sleeve having an upper flat portion and side wall means for securing said upper and lower portions in spaced parallel relationship, including means for holding said receptacle in a position spaced vertically from said lower wall of said microwave oven a general distance; and, wherein said holding means includes downwawrdly extending portions of said first sheet susceptor stock.
Claim 40
Dependent Claim
186 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facig heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; said receptacle is a sleeve having an upper flat portion and side wall means for securing said upper and lower portions in spaced parallel relationship, including means for holding said receptacle in a position spaced vertically from said lower wall of said microwave oven a general distance; and, wherein said holding means includes downwawrdly extending portions of said first sheet susceptor stock.
Claim 41
Dependent Claim
161 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing pasasge of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof, and including means for holding said receptacle in a position spaced vertically from said lower wall of said microwave oven a general distance, wherein said holding means includes downwardly extending portions of said first sheet susceptor stock.
Claim 42
Dependent Claim
161 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing pasasge of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof, and including means for holding said receptacle in a position spaced vertically from said lower wall of said microwave oven a general distance, wherein said holding means includes downwardly extending portions of said first sheet susceptor stock.
Claim 43
Dependent Claim
167 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; and, wherein said receptacle is a sleeve having an upper flat portion and side wall means for securing said upper and lower portions in spaced parallel relationship, including a layer of microwave reflecting metal foil between said layers of microwave susceptor sheet stock.
Claim 44
Dependent Claim
167 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; and, wherein said receptacle is a sleeve having an upper flat portion and side wall means for securing said upper and lower portions in spaced parallel relationship, including a layer of microwave reflecting metal foil between said layers of microwave susceptor sheet stock.
Claim 45
Dependent Claim
165 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock, having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; said receptacle is a sleeve having an upper flat portion and side wall means for securing said upper and lower portions in spaced parallel relationship; and, wherein said two layers are coterminous over most of said lower portion of said receptacle.
Claim 46
Dependent Claim
165 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a first sheet of microwave susceptor stock, having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; said receptacle is a sleeve having an upper flat portion and side wall means for securing said upper and lower portions in spaced parallel relationship; and, wherein said two layers are coterminous over most of said lower portion of said receptacle.
Claim 47
Dependent Claim
144 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a single sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of said single sheet of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; and, wherein said two layers are coterminous over most of said lower portion of said receptacle.
Claim 48
Dependent Claim
144 words
In a disposable receptacle for combined baking and cooking of a generally flat food article, having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a single sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: at least one additional layer of said single sheet of microwave susceptor sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle whereby said receptacle has at least two layers of microwave susceptor sheet stock at said lower portion thereof; and, wherein said two layers are coterminous over most of said lower portion of said receptacle.
Claim 49
Dependent Claim
117 words
In a disposable receptacle for combined baking and cooking of a generally flat food article having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: a layer of microwave reflective sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle, and including a second layer of microwave susceptor sheet stock over said reflective sheet stock.
Claim 50
Dependent Claim
117 words
In a disposable receptacle for combined baking and cooking of a generally flat food article having a given thickness in a microwave oven having a lower wall, said receptacle being constructed from a sheet of microwave susceptor stock having an outwardly exposed, dielectric support layer and an inwardly facing heater layer of microwave interactive material allowing passage of microwave energy as it is heated thereby, said receptacle further including a lower flat portion for supporting said food article, the improvement comprising: a layer of microwave reflective sheet stock secured onto said inwardly facing layer of said lower flat portion of said receptacle, and including a second layer of microwave susceptor sheet stock over said reflective sheet stock.
Claim 51
Dependent Claim
113 words
A sleeve for heating a food item with an outer peripheral shape, said receptacle comprising a single sheet stock formed into a self-supporting heating chamber and surrounding said food item, said chamber having a flat lower support wall formed from at least two coterminous layers of said single sheet with each layer having a microwave susceptor sheet stock taken together to form an overlapped portion at the support wall of said chamber with said overlapped portion in surface contact with said food item, said overlapped portion having an outer peripheral shape generally at least as large as said peripheral shape of said food item and located only at said flat lower support wall.
Claim 52
Dependent Claim
113 words
A sleeve for heating a food item with an outer peripheral shape, said receptacle comprising a single sheet stock formed into a self-supporting heating chamber and surrounding said food item, said chamber having a flat lower support wall formed from at least two coterminous layers of said single sheet with each layer having a microwave susceptor sheet stock taken together to form an overlapped portion at the support wall of said chamber with said overlapped portion in surface contact with said food item, said overlapped portion having an outer peripheral shape generally at least as large as said peripheral shape of said food item and located only at said flat lower support wall.
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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) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |