Patent US2431449A successfully refreshed from Google Patents.
US2431449A
Expired / Lapsed
US
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Airplane yaw and pitch control
Assignee: Northrop Grumman Corp
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Filing: 1945-04-24
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Granted: 1947-11-25
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Expires: 1965-04-24
Abstract
No abstract record available.
Inventors
- 👤 Irving L Ashkenas
- 👤 Stuart A Krieger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:48
CPC Classifications
B; B64; B64C; B64C13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US954270A
Cited
US1864236A
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US1931928A
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US1851907A
Cited
GB402645A
Cited
US2075817A
Cited
US2279615A
Cited
US2392443A
Cited
GB562365A
Cited
US2369152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |