Patent US2631677A successfully refreshed from Google Patents.
US2631677A
Expired / Lapsed
US
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Turbine propeller control
Assignee: Curtiss Wright Corp
•
Filing: 1946-08-31
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Granted: 1953-03-17
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Expires: 1966-08-31
Abstract
No abstract record available.
Inventors
- 👤 Kochenburger Ralph
- 👤 Charles W Chillson
- 👤 George P Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/48; F02C9/56; F02C9/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2322303A
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US2371889A
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US2336052A
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US2372686A
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US2432177A
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US2303998A
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US2336232A
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US2517150A
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US2457595A
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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) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |