US2424559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for variable pitch propellers
Assignee: Woodward Inc
•
Filing: 1943-11-26
•
Granted: 1947-07-29
•
Expires: 1963-11-26
Abstract
No abstract record available.
Inventors
- 👤 Drake George Forrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:16
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)
US1622939A
Cited
US2127687A
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FR792955A
Cited
US2207042A
Cited
GB485878A
Cited
US2333973A
Cited
US2327217A
Cited
US2267114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |