Patent US2474144A successfully refreshed from Google Patents.
US2474144A
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Electrically and power operated pitch changing mechanism
Assignee: Fairey Aviation Co Ltd
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Filing: 1944-12-13
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Granted: 1949-06-21
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Expires: 1964-12-13
Abstract
No abstract record available.
Inventors
- 👤 Forsyth Archibald Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:46
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2181985A
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US2314025A
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US2376673A
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US2327217A
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US2327216A
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US2346007A
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US2346856A
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US2293912A
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US2378938A
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US2405488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |