US2756830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amphibious vehicle and endless propelling belts therefor
Assignee: ERNEST DAVID WESLEY MAXWELL
•
Filing: 1953-01-26
•
Granted: 1956-07-31
•
Expires: 1973-01-26
Abstract
No abstract record available.
Inventors
- 👤 Hurthig Peter Ernfrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:40
CPC Classifications
B; B60; B60F; B60F3/00; B60F3/0007; B60F3/0015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1313095A
Cited
US1031098A
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US1106182A
Cited
US1374761A
Cited
US1357571A
Cited
US2072611A
Cited
US2320331A
Cited
US2415056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |