US2774555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leading edge flap and control system
Assignee: Northrop Grumman Corp
•
Filing: 1953-02-19
•
Granted: 1956-12-18
•
Expires: 1973-02-19
Abstract
No abstract record available.
Inventors
- 👤 James E Crawford
- 👤 Eugene V Browne
- 👤 John E Glenn
- 👤 John D Pigford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:42
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/38; B64C3/44; B64C3/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2346464A
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US1282494A
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US1631259A
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US1767966A
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US2295306A
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US2422296A
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US2381678A
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US2472653A
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US2582348A
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US2609165A
Cited
US2650047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |