US2708894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofoil craft having forwardly extending water engaging and hydrofoil moving means
Assignee: CALVERT P HOLT
•
Filing: 1952-03-06
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Granted: 1955-05-24
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Expires: 1972-03-06
Abstract
No abstract record available.
Inventors
- 👤 Hook Christopher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:20
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/285; B63B1/286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR959264A
Cited
US2550220A
Cited
US2387907A
Cited
US2491744A
Cited
GB587317A
Cited
US2576716A
Cited
US2603179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |