US2754922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch propeller control
Assignee: Motors Liquidation Co
•
Filing: 1952-04-24
•
Granted: 1956-07-17
•
Expires: 1972-04-24
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Berninger
- 👤 William A Weis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:54
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2413439A
Cited
GB600603A
Cited
US2405006A
Cited
US2526646A
Cited
US2599701A
Cited
US2513660A
Cited
US2507671A
Cited
US2626669A
Cited
US2592124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |