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US2677429A
Expired / Lapsed
US
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Stabilizing device for helicopters and the like flying machines
Assignee: CONST AERONAUTIQUES DU SUD QUE
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Filing: 1948-01-28
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Granted: 1954-05-04
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Expires: 1968-01-28
Abstract
No abstract record available.
Inventors
- 👤 Laufer Theodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:54
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1800470A
Cited
US1828783A
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US2088413A
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US2256635A
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US2444070A
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US2368698A
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US2439089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |