Patent US2808891A successfully refreshed from Google Patents.
US2808891A
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US
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Variable pitch propeller control mechanism
Assignee: Motors Liquidation Co
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Filing: 1953-10-23
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Granted: 1957-10-08
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Expires: 1973-10-23
Abstract
No abstract record available.
Inventors
- 👤 Iii Joseph Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:36
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20283E
Cited
US2217364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |