Patent US4844263A successfully refreshed from Google Patents.
US4844263A
Expired / Lapsed
US
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Food container
Assignee: Applied Extrusion Technologies Inc
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Filing: 1988-02-19
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Granted: 1989-07-04
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Expires: 2008-02-19
Abstract
Abstract A food container comprises top and bottom members, with the bottom member including a lower base wall and an upwardly extending side wall. Spaced apart downwardly extending depressions are formed in the lower base wall, and each of these depressions has an inside wall surface spaced inwardly from the surrounding side wall. The inside wall surfaces of the depressions collectively define an outline, and the top member has a raised central portion the outline of which is substantially identical to but slightly smaller than the outline defined by the depressions. This relationship enables the raised central portion of the top lid member to interlockingly fit between the depressions when assembled food containers are stacked one above the other. The raised central portion of the top lid member has less height than the depressions which spaces the lower base wall from the raised central portion when assembled containers are stacked. As a result, open passageways are provided between the spaced apart depressions, the lower base wall of the bottom member and the raised central portion of the top member which may include vent openings therein.
Inventors
- 👤 Frederick Hadtke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:48
CPC Classifications
B; B65; B65D; B65D21/00; B65D21/02; B65D21/0209; B65D21/0217; B65D21/022; B65D2205/00; B65D2205/02; B65D85/00; B65D85/30; B65D85/34
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
263 words
A food container comprising a bottom member and a top lid member constructed and arranged to cover the bottom member when the members are assembled, the bottom member including a lower base wall and an upwardly extending side wall surrounding the base wall, a plurality of spaced apart downwardly extending depressions in the lower base wall, each of the depressions having an inside wall surface spaced inwardly from the surrounding side wall of the bottom member, the inside wall surfaces of the depressions in the lower base wall of the bottom member collectively defining an outline, the top lid member including a raised central portion having an outline substantially identical to but slightly smaller than the outline defined by the inside wall surfaces of the depressions whereby the raised central portion of the top lid member interlockingly fits between the inside wall surfaces of the depressions when assembled food containers are stacked one above the other, a depressed area in the raised central portion of the top lid member, a plurality of vent openings in the depressed area, and the raised central portion of the top lid member having less height than the depressions whereby the lower base wall of the bottom member is spaced from the raised central portion of the top lid member when assembled food containers are stacked one above the other thereby providing open passageways between the spaced apart depressions, the lower base wall of the bottom member and the raised central portion of the top lid member with the plurality of vent openings in the depressed area thereof.
Claim 2
Dependent Claim
263 words
A food container comprising a bottom member and a top lid member constructed and arranged to cover the bottom member when the members are assembled, the bottom member including a lower base wall and an upwardly extending side wall surrounding the base wall, a plurality of spaced apart downwardly extending depressions in the lower base wall, each of the depressions having an inside wall surface spaced inwardly from the surrounding side wall of the bottom member, the inside wall surfaces of the depressions in the lower base wall of the bottom member collectively defining an outline, the top lid member including a raised central portion having an outline substantially identical to but slightly smaller than the outline defined by the inside wall surfaces of the depressions whereby the raised central portion of the top lid member interlockingly fits between the inside wall surfaces of the depressions when assembled food containers are stacked one above the other, a depressed area in the raised central portion of the top lid member, a plurality of vent openings in the depressed area, and the raised central portion of the top lid member having less height than the depressions whereby the lower base wall of the bottom member is spaced from the raised central portion of the top lid member when assembled food containers are stacked one above the other thereby providing open passageways between the spaced apart depressions, the lower base wall of the bottom member and the raised central portion of the top lid member with the plurality of vent openings in the depressed area thereof.
Claim 3
Dependent Claim
45 words
A food container as in claim 1 wherein the lower base wall of the bottom member is generally rectangular and the spaced apart downwardly extending depressions therein are positioned at the corners of the lower base wall, one at each of the four corners thereof.
Claim 4
Dependent Claim
27 words
A food container as in claim 2 wherein each of the spaced apart downwardly extending depressions in the lower base wall of the bottom member is L-shaped.
Claim 5
Dependent Claim
47 words
A food container as in claim 1 wherein each of the spaced apart downwardly extending depressions in the lower base wall of the bottom member includes an outside wall surface, and wherein these outside wall surfaces form extensions of the surrounding side wall of the bottom member.
Claim 6
Dependent Claim
21 words
A food container as in claim 1 wherein the lower base wall of the bottom member is generally rectangular in configuration.
Claim 7
Dependent Claim
28 words
A food container as in claim 1 wherein the top lid member includes an upwardly extending dome and wherein the raised central portion extends upwardly from the dome.
Claim 8
Dependent Claim
43 words
A food container as in claim 1 wherein the outline collectively defined by the inside wall surfaces of the depressions in the base wall of the bottom member and the outline of the raised central portion of the top lid member are rectangular.
Claim 9
Dependent Claim
37 words
A food container as in claim 1 wherein the height of the raised central portion of the top lid member is approximately one-third the height of the depressions in the lower base wall of the bottom member.
Claim 10
Dependent Claim
23 words
A food container as in claim 1 wherein the bottom and top lid members include outwardly extending and mutually engaging peripheral rim flanges.
Claim 11
Dependent Claim
19 words
A food container as in claim 9 wherein the rim flanges are releasably connected together by a heat seal.
Claim 12
Dependent Claim
17 words
A food container as in claim 9 wherein the rim flanges are releasably connected together by adhesive.
Claim 13
Dependent Claim
31 words
A food container as in claim 9 wherein each of the mutually engaging rim flanges includes a separation tab to facilitate removal of the top lid member from the bottom member.
Claim 14
Dependent Claim
20 words
A food container as in claim 1 wherein the bottom and top lid members are fabricated from transparent polyvinyl chloride.
Claim 15
Dependent Claim
36 words
A food container as in claim 9 wherein the bottom member includes a raised peripheral rim adjacent its peripheral rim flange and the top lid member includes a complementary peripheral rim adjacent its peripheral rim flange.
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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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |