US2640549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet-driven sustaining propeller for aircraft
Assignee: Individual
•
Filing: 1946-08-03
•
Granted: 1953-06-02
•
Expires: 1966-08-03
Abstract
No abstract record available.
Inventors
- 👤 Isacco Vittorio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:43
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/02; B64C39/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1718577A
Cited
US1820946A
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GB366450A
Cited
US1932702A
Cited
US1855084A
Cited
US1983493A
Cited
US2108245A
Cited
US2180922A
Cited
US2120168A
Cited
US2371687A
Cited
US2415584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |