Patent US2648390A successfully refreshed from Google Patents.
US2648390A
Expired / Lapsed
US
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Variable pitch screw propeller
Assignee: Individual
•
Filing: 1947-07-30
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Granted: 1953-08-11
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Expires: 1967-07-30
Abstract
No abstract record available.
Inventors
- 👤 Lagabbe Edmond De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:33
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; Y; Y10; Y10S; Y10S415/00; Y10S415/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1449129A
Cited
FR546394A
Cited
US1656019A
Cited
US1886289A
Cited
US2055928A
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US2126813A
Cited
US2145805A
Cited
GB550227A
Cited
GB550484A
Cited
CH235700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |