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US2743618A
Expired / Lapsed
US
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Operating the flaps of aircraft wings
Assignee: Sir WG Armstrong Whitworth and Co Engineers Ltd
•
Filing: 1954-01-11
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Granted: 1956-05-01
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Expires: 1974-01-11
Abstract
No abstract record available.
Inventors
- 👤 Watson Henry Romaine
- 👤 Elliott Frederick Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:52
CPC Classifications
B; B64; B64C; B64C13/00; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2254304A
Cited
US2252251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |