US2431184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite blade
Assignee: UNITED AIRERAFT Corp
•
Filing: 1943-09-23
•
Granted: 1947-11-18
•
Expires: 1963-09-23
Abstract
No abstract record available.
Inventors
- 👤 Martin Erle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:28
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/16; B64C11/20; B64C11/205; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1842178A
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GB424969A
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GB452841A
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DE706001C
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GB457733A
Cited
GB492804A
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FR840258A
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GB541078A
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US2292089A
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US2312219A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |