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US3551940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Box hinge
Assignee: Eli Lilly and Co
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Filing: 1968-08-19
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Granted: 1971-01-05
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Expires: 1988-08-19
Abstract
Abstract A METHOD FOR FORMING A HINGE IN PLASTIC SHEET MATERIAL SUSCEPTIBLE TO FORMATION BY HEAT AND PRESSURE WHEREBY TWO FLUSH SURFACES MAY BE INTEGRALLY HINGED. THE HINGE IS FORMED BY CONFORMING PLASTIC SHEET MATERIAL INTO A PAIR OF LONGITUDINAL VALLEYS IN A MOLD WHICH ARE SEPARATED BY A LONGITUDINAL RIDGE.
Inventors
- 👤 Jack Roger Edison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:44
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/04; B29C53/06; B29C53/063; B29C51/00; E; E05; E05D; E05D1/00; E05D1/02; B29C37/00; B29C37/0053; B29C37/0057; B29L; B29L2031/00; B29L2031/22
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |