Patent US2566684A successfully refreshed from Google Patents.
Patent US2457609A successfully refreshed from Google Patents.
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 10:45
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE21108E
Cited
US2032254A
Cited
US1987651A
Cited
US1967461A
Cited
US2032255A
Cited
US2021999A
Cited
FR793323A
Cited
US2147078A
Cited
US2144428A
Cited
US2233468A
Cited
US2307101A
Cited
US2433990A
Cited
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 |