US2254473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airplane vibration dampener
Assignee: Individual
•
Filing: 1935-01-16
•
Granted: 1941-09-02
•
Expires: 1955-01-16
Abstract
No abstract record available.
Inventors
- 👤 Bell George W De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:36
CPC Classifications
B; B64; B64D; B64D45/00; B64D2045/0085; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-09-01 | 1945-03-03 | 1945-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-01 | 1949-03-03 | 1949-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-01 | 1953-03-03 | 1953-09-02 | $7700.00 | Window Closed / Lapsed |