US2640553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller movement damping device
Assignee: Bristol Aeroplane Co Ltd
•
Filing: 1947-06-03
•
Granted: 1953-06-02
•
Expires: 1967-06-03
Abstract
No abstract record available.
Inventors
- 👤 Hafner Raoul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:21
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/51
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1943458A
Cited
US1905776A
Cited
US1884905A
Cited
US1899096A
Cited
US1949410A
Cited
US2265366A
Cited
US2252544A
Cited
US2250826A
Cited
US2318259A
Cited
US2494985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |