US2679298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller pitch control device responsive to air speed
Assignee: Individual
•
Filing: 1947-03-04
•
Granted: 1954-05-25
•
Expires: 1967-03-04
Abstract
No abstract record available.
Inventors
- 👤 Wykes Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:12
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1908894A
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US2209879A
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US2272664A
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US2243095A
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US2346979A
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US2347104A
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US2360791A
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US2377457A
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US2389170A
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US2422758A
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US2432320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |