US3027949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable pitch propeller having integral control system
Assignee: Hartzell Propeller Inc
•
Filing: 1959-05-11
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Granted: 1962-04-03
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Expires: 1979-05-11
Abstract
No abstract record available.
Inventors
- 👤 Biermann David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:54
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/42; B63; B63H; B63H3/00; B63H3/06; B63H3/08; B63H3/081; B63H3/082; B64C11/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20283E
Cited
US1846488A
Cited
US2163663A
Cited
US2403532A
Cited
US2578350A
Cited
US2441838A
Cited
US2911050A
Cited
US2948344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |