US3577495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Egg carton forming method
Assignee: Individual
•
Filing: 1969-07-28
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Granted: 1971-05-04
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Expires: 1989-07-28
Abstract
Abstract AN EGG CARTON FORMING METHOD WHEREIN A SHEET OF POLYSTYRENE IS PASSED THROUGH A PREDETERMINED PATH WHERE THE SHEET IS HEATED AT A FIRST STATION. A PLURALITY OF EGG CARTON IMPRESSIONS EACH COMPLETE WITH EGG TRAY, LID AND LOCKING FLAP ARE FORMED ACROSS THE WIDTH OF THE SHEET AT A SECOND STATION. LATCHING HOLES ARE PUNCHED IN THE LID IMPRESSIONS AT A THIRD STATION, AND THE EGG CARTON IMPRESSIONS ARE CUT AWAY FROM THE SHEET OF MATERIAL AT A FOURTH STATION.
Inventors
- 👤 Beverly P Head Jr
- 👤 John G Waller
- 👤 David L Pearl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:16
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/44; B29C51/445; B29C51/18; Y; Y10; Y10T; Y10T83/00; Y10T83/384; Y10T83/392; Y10T83/465; Y10T83/4757; Y10T83/476
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |