US4809868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage and cooking container with lid release tab
Assignee: PRESTIGE PLASTICS Inc C/O HOME PRODUCTS INTERNATIONAL Inc
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Filing: 1988-01-11
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Granted: 1989-03-07
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Expires: 2008-01-11
Abstract
Abstract Plastic food storage and cooking container having an airtight seal between the lid and the bowl of the container, with a release tab for lifting the lid away from the bowl with a prying action.
Inventors
- 👤 James F. Pomroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:35
CPC Classifications
B; B65; B65D; B65D43/00; B65D43/26; B65D43/267; B65D43/02; B65D43/0202; B65D43/0214; B65D43/0218; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00064; B65D2543/00074; B65D2543/00092; B65D2543/00259; B65D2543/00296; B65D2543/00342; B65D2543/00351; B65D2543/00444; B65D2543/00481; B65D2543/0049; B65D2543/00518; B65D2543/00537; B65D2543/00555; B65D2543/00824; B65D2543/00833; B65D2543/00842; B65D2543/00888
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
In a container for use in the storage and/or cooking of a food product: a bowl having a peripheral side wall terminating in an upper rim with a flange having a generally planar upper surface projecting laterally from the side wall below the rim, a lid removably mounted on the bowl with a peripheral portion of the lid in sealing engagement with the rim of the bowl, a tab hingedly connected to the peripheral portion of the lid and projecting laterally therefrom, and a curved cam surface on the underside of the tab in rocking engagement with the planar surface of the flange for lifting the peripheral portion of the lid away from the bowl upon depression of the tab.
Claim 2
Dependent Claim
120 words
In a container for use in the storage and/or cooking of a food product: a bowl having a peripheral side wall terminating in an upper rim with a flange having a generally planar upper surface projecting laterally from the side wall below the rim, a lid removably mounted on the bowl with a peripheral portion of the lid in sealing engagement with the rim of the bowl, a tab hingedly connected to the peripheral portion of the lid and projecting laterally therefrom, and a curved cam surface on the underside of the tab in rocking engagement with the planar surface of the flange for lifting the peripheral portion of the lid away from the bowl upon depression of the tab.
Claim 3
Dependent Claim
24 words
The container of claim 1 wherein the bowl is fabricated of a thermoset plastic material, and the lid is fabricated of a thermoplastic material.
Claim 4
Dependent Claim
41 words
The container of claim 1 wherein the lid and the tab are formed as a unitary structure of a thermoplastic material with an area of reduced thickness forming the hinged connection between the tab and the peripheral portion of the lid.
Claim 5
Dependent Claim
28 words
The container of claim 1 wherein the curved cam surface is formed on a cam member which projects in a downward direction from the underside of the tab.
Claim 6
Dependent Claim
122 words
In a container: a bowl having a peripheral side wall terminating in an upper rim with a flange projecting laterally from the side wall below the rim, a lid removably mounted on the bowl and having a downwardly opening peripheral groove in which the rim of the bowl is received in sealing engagement, with the side walls of the rim and the groove being upwardly and outwardly inclined so that the rim snaps into the groove to secure the lid to the bowl, a tab projecting laterally from the peripheral portion of the lid, and a cam surface on the underside of the tab and engageable with the flange for lifting the lid away from the bowl upon depression of the tab.
Claim 7
Dependent Claim
122 words
In a container: a bowl having a peripheral side wall terminating in an upper rim with a flange projecting laterally from the side wall below the rim, a lid removably mounted on the bowl and having a downwardly opening peripheral groove in which the rim of the bowl is received in sealing engagement, with the side walls of the rim and the groove being upwardly and outwardly inclined so that the rim snaps into the groove to secure the lid to the bowl, a tab projecting laterally from the peripheral portion of the lid, and a cam surface on the underside of the tab and engageable with the flange for lifting the lid away from the bowl upon depression of the tab.
Claim 8
Dependent Claim
24 words
The container of claim 5 wherein the bowl is fabricated of a thermoset plastic material, and the lid is fabricated of a thermoplastic material.
Claim 9
Dependent Claim
18 words
The container of claim 5 wherein the tab is hingedly connected to the peripheral portion of the lid.
Claim 10
Dependent Claim
41 words
The container of claim 7 wherein the lid and the tab are formed as a unitary structure of a thermoplastic material with an area of reduced thickness forming the hinged connection between the tab and the peripheral portion of the lid.
Claim 11
Dependent Claim
27 words
The container of claim 5 wherein the cam surface is formed on a cam member which projects in a downward direction from the underside of the tab.
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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) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |