US3676016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controllable pitch propellers
Assignee: Individual
•
Filing: 1970-09-21
•
Granted: 1972-07-11
•
Expires: 1990-09-21
Abstract
Abstract IN A CONTROLLABLE PITCH PROPELLER, A DOUBLE CRANK BLADE TURNING MECHANISM HAVING A PIVOTABLE PISTON ASSEMBLY WITH SELF-ALIGNING CONNECTIONS TO ONE SET OF CRANKPINS, TO PROVIDE EQUAL LOADING ON ALL THE CRANKPINS.
Inventors
- 👤 Arne Feroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:20
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/06; B63H3/08; B63H3/081; B63H3/082; B64; B64C; B64C27/00; B64C27/54
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |