US2533346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual rotation propeller
Assignee: Curtiss Wright Corp
•
Filing: 1944-01-19
•
Granted: 1950-12-12
•
Expires: 1964-01-19
Abstract
No abstract record available.
Inventors
- 👤 George W Brady
- 👤 Charles W Chillson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:01
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2124078A
Cited
GB483760A
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FR819581A
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FR844832A
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US2228776A
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FR50162E
Cited
US2338420A
Cited
US2291953A
Cited
US2362444A
Cited
US2293912A
Cited
US2389161A
Cited
US2367230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |