US2440956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration dampening means for multiblade aircraft propellers
Assignee: RTX Corp
•
Filing: 1945-09-21
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Granted: 1948-05-04
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Expires: 1965-09-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles M Kearns
- 👤 Walter E Arnoldi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:16
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/12; F16F15/129; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |