US2749870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofoil attack craft
Assignee: HYDROFOIL Corp
•
Filing: 1951-10-23
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Granted: 1956-06-12
•
Expires: 1971-10-23
Abstract
No abstract record available.
Inventors
- 👤 Vavra Michael Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:06
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/246; B63B1/28; B63B1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US811743A
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US1123068A
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US1250560A
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US1750959A
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US1875190A
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GB492046A
Cited
US2387907A
Cited
US2491744A
Cited
US2597048A
Cited
US2603179A
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US2584347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |