Patent US3567107A successfully refreshed from Google Patents.
US3567107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Egg carton
Assignee: WR Grace and Co
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Filing: 1969-04-24
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Granted: 1971-03-02
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Expires: 1989-04-24
Abstract
Abstract A molded, one-piece egg carton having an egg-receiving tray, a lid hingedly attached to one side of the tray, a locking tab hingedly attached to the other side of the tray, and a locking bar on the interior surface of the front panel of the lid whereby when the locking tab is rotated and held so that the lid will close over it, the tab and bar cooperate to lock the lid to the tray.
Inventors
- 👤 Kenneth W Artz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:20
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/30; B65D85/32; B65D85/324
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
In an egg carton having an egg-receiving tray with front and rear sides and a lid with front and rear panels, said lid being hingedly attached to the rear side of said tray, the improvement comprising: a. an elongated locking tab hingedly to the front side of said tray, said tab having a single rectangularly shaped, indentation therein extending substantially the length of the tab; and b. a single, straight elongated locking bar projecting from the interior surface of the front panel of said lid, for a major portion of the length thereof, said locking bar being so disposed as to cooperate with the single indentation in said locking tab when said tab is rotated to be interior of said lid as it is closed, said tab and said bar being substantially equally coextensive, the tendency of the tab to resist rotation holding said tab and bar in cooperating position thereby locking said carton lid and tray.
Claim 2
Dependent Claim
157 words
In an egg carton having an egg-receiving tray with front and rear sides and a lid with front and rear panels, said lid being hingedly attached to the rear side of said tray, the improvement comprising: a. an elongated locking tab hingedly to the front side of said tray, said tab having a single rectangularly shaped, indentation therein extending substantially the length of the tab; and b. a single, straight elongated locking bar projecting from the interior surface of the front panel of said lid, for a major portion of the length thereof, said locking bar being so disposed as to cooperate with the single indentation in said locking tab when said tab is rotated to be interior of said lid as it is closed, said tab and said bar being substantially equally coextensive, the tendency of the tab to resist rotation holding said tab and bar in cooperating position thereby locking said carton lid and tray.
Claim 3
Dependent Claim
27 words
The egg carton of claim 1 wherein said locking bar is formed by an elongated indentation in the exterior surface of the front panel of said lid.
Claim 4
Dependent Claim
30 words
The egg carton of claim 1 wherein said lid is provided with at least one opening boss port to permit the egg carton to be easily opened with the fingers.
Claim 5
Dependent Claim
15 words
The egg carton of claim 1 wherein said egg carton is of molded, one-piece construction.
Claim 6
Dependent Claim
16 words
The egg carton of claim 4 wherein said egg carton is molded from expanded thermoplastic foam.
Claim 7
Dependent Claim
17 words
The egg carton of claim 4 wherein said egg carton is molded from a cellulose pulp material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |