Patent US2455378A successfully refreshed from Google Patents.
US2455378A
Expired / Lapsed
US
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Mechanism and controls for controllable aircraft propellers; complete propeller with automatic controls
Assignee: Individual
•
Filing: 1943-11-27
•
Granted: 1948-12-07
•
Expires: 1963-11-27
Abstract
No abstract record available.
Inventors
- 👤 Howard M Mccoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:59
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/44
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-07 | 1952-06-07 | 1952-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-07 | 1956-06-07 | 1956-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-07 | 1960-06-07 | 1960-12-07 | $7700.00 | Window Closed / Lapsed |