US2739770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airfoil anti-flutter device
Assignee: RTX Corp
•
Filing: 1952-11-14
•
Granted: 1956-03-27
•
Expires: 1972-11-14
Abstract
No abstract record available.
Inventors
- 👤 Roy A Fanti
- 👤 Charles B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:14
CPC Classifications
B; B64; B64C; B64C13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR459629A
Cited
US1361277A
Cited
GB192568A
Cited
US1549223A
Cited
US1815489A
Cited
US1893064A
Cited
US2026482A
Cited
GB511650A
Cited
US2334070A
Cited
FR929942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |