US2457609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch changing mechanism
Assignee: Fairey Aviation Co Ltd
•
Filing: 1945-02-08
•
Granted: 1948-12-28
•
Expires: 1965-02-08
Abstract
No abstract record available.
Inventors
- 👤 Smith-Pert George James
- 👤 Forsyth Archibald Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:55
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2433990A
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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) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |