US2615520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced propeller blade
Assignee: Curtiss Wright Corp
•
Filing: 1947-11-26
•
Granted: 1952-10-28
•
Expires: 1967-11-26
Abstract
No abstract record available.
Inventors
- 👤 Carl A Liedholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:11
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/16; B64C11/20; B64C11/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1916027A
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US1940333A
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US2288033A
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US2193351A
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US2231750A
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US2343418A
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US2364610A
Cited
US2427785A
Cited
US2406471A
Cited
US2422810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |