Patent US2510561A successfully refreshed from Google Patents.
US2510561A
Expired / Lapsed
US
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Airplane control surface
Assignee: Lockheed Martin Corp
•
Filing: 1944-07-22
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Granted: 1950-06-06
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Expires: 1964-07-22
Abstract
No abstract record available.
Inventors
- 👤 Laval Fulvio M De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:28
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US123629A
Cited
US1327543A
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GB131497A
Cited
US1813645A
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US1742461A
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US1824882A
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US1957896A
Cited
US2128060A
Cited
US2160089A
Cited
US2137385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |