US2750132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airplane aileron and spoiler combination
Assignee: Lockheed Martin Corp
•
Filing: 1953-01-07
•
Granted: 1956-06-12
•
Expires: 1973-01-07
Abstract
No abstract record available.
Inventors
- 👤 Edward D Palmer
- 👤 James B Pray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:27
CPC Classifications
B; B64; B64C; B64C13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1723653A
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US2070006A
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US2153667A
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US2254304A
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US2315775A
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US2424889A
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US2443808A
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US2494208A
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US2549044A
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 |