US2721046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable dihedral mechanism for aircraft wings
Assignee: North American Aviation Corp
•
Filing: 1949-03-26
•
Granted: 1955-10-18
•
Expires: 1969-03-26
Abstract
No abstract record available.
Inventors
- 👤 Donald M Leitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:52
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/38; B64C3/42; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2151
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1547181A
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US1710670A
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US833994A
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US1834858A
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US2075787A
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US2011254A
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US2418301A
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US2436079A
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US2473792A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |