US3687350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Egg carton cell structure
Assignee: Mobil Oil AS
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Filing: 1970-06-01
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Granted: 1972-08-29
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Expires: 1990-06-01
Abstract
Abstract An egg carton structure comprising a carton cover member joined to a cellular bottom member with a locking flap attached thereto whereby such a carton, when in a closed position, is maintained in a releasably locked position by cooperation of locking elements located on the locking flap and the front wall of the carton cover member. The cellular bottom member is characterized by having individual egg-retaining cells specifically designed to minimize or eliminate egg breakage when compressive forces are applied against the closed carton.
Inventors
- 👤 Richard T Warburton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:45
CPC Classifications
B; B65; B65D; B65D85/00; B65D85/30; B65D85/32; B65D85/324
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A thermoplastic foam egg carton structure comprising a cover member hinged to a bottom cellular member, said cellular member having a plurality of egg-receiving cells formed therein, each of said cells having at least one vertical wall section adapted to allow for cell expansion upon the application of compressive forces exerted on individual eggs positioned in said cells, said egg-receiving cells being further characterized by having a substantially flat base integrally joined to said wall, said cell wall extending upwardly and outwardly from said base, said cell wall comprising a plurality of relatively flat surfaces vertically spaced apart by concave surfaces, each of said relatively flat surfaces and said concave surfaces extending from the bottom of said cell wall to substantially the top of said cell wall.
Claim 2
Dependent Claim
127 words
A thermoplastic foam egg carton structure comprising a cover member hinged to a bottom cellular member, said cellular member having a plurality of egg-receiving cells formed therein, each of said cells having at least one vertical wall section adapted to allow for cell expansion upon the application of compressive forces exerted on individual eggs positioned in said cells, said egg-receiving cells being further characterized by having a substantially flat base integrally joined to said wall, said cell wall extending upwardly and outwardly from said base, said cell wall comprising a plurality of relatively flat surfaces vertically spaced apart by concave surfaces, each of said relatively flat surfaces and said concave surfaces extending from the bottom of said cell wall to substantially the top of said cell wall.
References Cited (Backward Citations)
US3074582A
Cited
US3016176A
Cited
US3207409A
Cited
US3166467A
Cited
US3282458A
Cited
US3310218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |