Patent US2612228A successfully refreshed from Google Patents.
US2612228A
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Electrically driven propeller pitch change system
Assignee: Fairey Aviation Co Ltd
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Filing: 1946-07-02
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Granted: 1952-09-30
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Expires: 1966-07-02
Abstract
No abstract record available.
Inventors
- 👤 Forsyth Archibald Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:07
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US684453A
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US882878A
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US2124791A
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US2256794A
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US2370135A
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US2365676A
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US2430705A
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US2491172A
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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) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |