US4930639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ovenable food container with removable lid
Assignee: WESTVACO Corp 299 PARK AVENUE NEW YORK NY 10171 A CORPOF
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Filing: 1989-08-02
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Granted: 1990-06-05
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Expires: 2009-08-02
Abstract
Abstract A container for packaging, storing and heating food is prepared from a single blank of paperboard that is coated on at least one side with a thermally stable heat-sealable coating. The container is substantially rectangular in shape and includes upstanding side, front and rear walls connected to a bottom panel, gusset panels at each corner, integral flanges connected to the side walls, an integral lid foldably attached to the rear wall and adapted to be heat-sealed to the side wall flanges, and a front closure flap integral with the lid and adapted to overlap and be sealed to the front wall.
Inventors
- 👤 William R. Rigby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:58
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/54; B65D5/545; B65D5/546; B65D5/5455; Y; Y10; Y10S; Y10S229/00; Y10S229/902; Y10S229/903
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
200 words
A container for packaging, storing and cooking food consisting of an integral lid and tray comprising: (a) a base panel: (b) a plurality of upstanding tray walls foldably attached to said base panel along opposed score lines comprising at least two opposed side walls, a front wall and a rear wall; (c) gusset panel closures foldably connected between the ends of said tray walls, said gusset panels being overlappingly bonded together and to said side walls; (d) flange extensions foldably attached to the upper edges of said opposed side walls and adapted to lie in a plane substantially parallel to the plane of said base panel: (e) a lid panel integrally attached to said rear wall along the upper edge thereof said lid including side extensions adapted to overlap and be bonded to said side wall flange extensions when the container is closed; (f) a front wall closure flap foldably attached to the leading edge of said lid panel and adapted to be overlappingly bonded to said front wall; (g) means in said front wall closure flap for releasing the lid from the front wall: and, (h) means in said lid panel for detachably removing said lid from said tray.
Claim 2
Dependent Claim
200 words
A container for packaging, storing and cooking food consisting of an integral lid and tray comprising: (a) a base panel: (b) a plurality of upstanding tray walls foldably attached to said base panel along opposed score lines comprising at least two opposed side walls, a front wall and a rear wall; (c) gusset panel closures foldably connected between the ends of said tray walls, said gusset panels being overlappingly bonded together and to said side walls; (d) flange extensions foldably attached to the upper edges of said opposed side walls and adapted to lie in a plane substantially parallel to the plane of said base panel: (e) a lid panel integrally attached to said rear wall along the upper edge thereof said lid including side extensions adapted to overlap and be bonded to said side wall flange extensions when the container is closed; (f) a front wall closure flap foldably attached to the leading edge of said lid panel and adapted to be overlappingly bonded to said front wall; (g) means in said front wall closure flap for releasing the lid from the front wall: and, (h) means in said lid panel for detachably removing said lid from said tray.
Claim 3
Dependent Claim
37 words
The container of claim 1 wherein at least one of said gusset panels at each corner of said tray includes an upper flange extension which is bonded to the underside of an adjacent side wall flange extension.
Claim 4
Dependent Claim
26 words
The container of claim 2 wherein said front wall closure flap comprises a pair of panels separated from one another along a single line of tear.
Claim 5
Dependent Claim
60 words
The container of claim 3 wherein the means in said lid panel for detachable removing said lid from said tray comprises paired microcut lines located on the inner and outer surfaces of said lid inboard of and parallel to the extended areas of said lid in the region adjacent to the bond between said lid and said side wall extensions.
Claim 6
Dependent Claim
31 words
The container of claim 4 wherein a dust flap is foldably attached to the upper edge of said front wall which is folded inside said container when the container is sealed.
Claim 7
Dependent Claim
29 words
The container of claim 5 wherein the connection between said lid and said rear wall is a line of perforations permitting complete removal of said lid from said tray.
Claim 8
Dependent Claim
54 words
The container of claim 6 wherein said side walls are angularly disposed upwardly and outwardly with respect to said base panel to permit easy stacking of said trays and said front and rear walls are disposed perpendicularly with respect to said base panel to permit the containers to be displayed with the top showing.
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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) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |