US5300748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recyclable microwavable container with a hinged removable outer shell
Assignee: Pactiv LLC
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Filing: 1992-07-27
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Granted: 1994-04-05
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Expires: 2012-07-27
Abstract
Abstract A microwavable container useful in the microwave heating of items, particularly foodstuffs, comprises readily separable components. An outer shell which will remain relatively cool and, therefore, capable of being handled, is flexibly hinged to an inner shell capable of sustaining high temperatures. The inner shell rotatably folds about the flexible hinge in such a way that it is arranged in a substantially spaced relation to the outer shell and is releasably secured to the outer shell. The outer shell is made of a first microwavable polymeric material. The inner shell is made of a second microwavable polymeric material which is different from the first microwavable polymeric material. A consumer may heat a food product in the inner shell of the present invention without risking contact with that inner shell when the inner shell becomes hot. After use, the components are readily separable for separate recycling processes.
Inventors
- 👤 Edward A. Colombo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:46
CPC Classifications
B; B65; B65D; B65D11/00; B65D11/16; B65D81/00; B65D81/34; B65D81/3446; B65D81/3453; B65D81/38; B65D81/3813; B65D81/3818; B65D2565/00; B65D2565/38; B65D2565/381; B65D2565/385; Y; Y10; Y10S; Y10S229/00; Y10S229/902; Y10S229/903; Y10S99/00; Y10S99/14
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
91 words
A microwavable container comprising: an outer shell comprising a first microwavable polymeric material; an inner shell comprising a second microwavable polymeric material different from said first microwavable polymeric material; and a flexible connecting means, said flexible connecting means forming a hinge member extending from an outer shelf of said outer shell to an outer shelf of said inner shell, said inner shell rotatably folding about said hinge such that said inner shell is disposed in a substantially spaced relation to said outer shell and is releasably secured to said outer shell.
Claim 2
Dependent Claim
91 words
A microwavable container comprising: an outer shell comprising a first microwavable polymeric material; an inner shell comprising a second microwavable polymeric material different from said first microwavable polymeric material; and a flexible connecting means, said flexible connecting means forming a hinge member extending from an outer shelf of said outer shell to an outer shelf of said inner shell, said inner shell rotatably folding about said hinge such that said inner shell is disposed in a substantially spaced relation to said outer shell and is releasably secured to said outer shell.
Claim 3
Dependent Claim
22 words
A microwavable container according to claim 1 wherein said outer shell and said inner shell are substantially separated by an air gap.
Claim 4
Dependent Claim
19 words
A microwavable container according to claim 2 wherein said inner shell is releasably snap fit into said outer shell.
Claim 5
Dependent Claim
13 words
A microwavable container according to claim 1 wherein said hinge member is perforated.
Claim 6
Dependent Claim
17 words
A microwavable container according to claim 1 wherein said second microwavable polymeric material has a high-temperature resistance.
Claim 7
Dependent Claim
29 words
A microwavable container according to claim 5 wherein said second microwavable polymeric material is selected from the group consisting of polyester, polypropylene, polyphenylene oxide and blends and copolymers thereof.
Claim 8
Dependent Claim
25 words
A microwavable container according to claim 6 wherein said first microwavable polymeric material is selected from the group consisting of polystyrene, amorphous polyester, and polyvinylchloride.
Claim 9
Dependent Claim
16 words
A microwavable container according to claim 7 wherein said first microwavable polymeric material comprises oriented polystyrene.
Claim 10
Dependent Claim
19 words
A microwavable container according to claim 8 wherein said inner shell is releasably snap fit into said outer shell.
Claim 11
Dependent Claim
25 words
A microwavable container according to claim 1 wherein said first microwavable polymeric material is selected from the group consisting of polystyrene, amorphous polyester, and polyvinylchloride.
Claim 12
Dependent Claim
19 words
A microwavable container according to claim 6 wherein said inner shell is releasably snap fit into said outer shell.
Claim 13
Dependent Claim
16 words
A microwavable container according to claim 1 wherein said first microwavable polymeric material comprises oriented polystyrene.
Claim 14
Dependent Claim
19 words
A microwavable container according to claim 1 wherein said inner shell is releasably snap fit into said outer shell.
Claim 15
Dependent Claim
101 words
A microwavable container comprising: an outer shell comprising a first microwavable polymeric material; an inner shell comprising a second microwavable polymeric material different from said first microwavable polymeric material; and a flexible connecting means, said flexible connecting means forming a hinge member extending from an outer shelf of said outer shell to an outer shelf of said inner shell, said inner shell rotatably folding about said hinge; wherein said inner shell is releasably secured in substantially spaced relation to said outer shell in a manner such that said outer shell and said inner shell are substantially separated by an air gap.
Claim 16
Dependent Claim
101 words
A microwavable container comprising: an outer shell comprising a first microwavable polymeric material; an inner shell comprising a second microwavable polymeric material different from said first microwavable polymeric material; and a flexible connecting means, said flexible connecting means forming a hinge member extending from an outer shelf of said outer shell to an outer shelf of said inner shell, said inner shell rotatably folding about said hinge; wherein said inner shell is releasably secured in substantially spaced relation to said outer shell in a manner such that said outer shell and said inner shell are substantially separated by an air gap.
Claim 17
Dependent Claim
18 words
A microwavable container according to claim 14 wherein said inner shell is snap fit into said outer shell.
Claim 18
Dependent Claim
29 words
A microwavable container according to claim 14 wherein said first microwavable polymeric material is selected from the group consisting of polystyrene, polyvinyl chloride, polyethylene, and blends and copolymers thereof.
Claim 19
Dependent Claim
29 words
A microwavable container according to claim 11 wherein said second microwavable polymeric material is selected from the group consisting of polyester, polypropylene, polyphenylene oxide, and blends and copolymers thereof.
Claim 20
Dependent Claim
29 words
A microwavable container according to claim 14 wherein said second microwavable polymeric material is selected from the group consisting of polyester, polypropylene, polyphenylene oxide, and blends and copolymers thereof.
Claim 21
Dependent Claim
42 words
A microwavable container according to claim 14 wherein said first microwavable polymeric material comprises oriented polystyrene and said second microwavable polymeric material comprises a polymeric material selected from the group consisting of crystallized polyester, polypropylene, polyphenylene oxide and blends and copolymers thereof.
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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) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |