US2670050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiblade propeller and cowling therefor
Assignee: Curtiss Wright Corp
•
Filing: 1949-03-30
•
Granted: 1954-02-23
•
Expires: 1969-03-30
Abstract
No abstract record available.
Inventors
- 👤 Louis H Enos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/02; B64C11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191028025A
Cited
US1348432A
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GB293587A
Cited
US1887045A
Cited
GB381648A
Cited
FR768696A
Cited
FR882069A
Cited
US2410545A
Cited
US2460559A
Cited
US2503822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |