Patent US2417189A successfully refreshed from Google Patents.
US2417189A
Expired / Lapsed
US
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Tailless airplane
Assignee: CORNELIUS AIRCRAFT Corp
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Filing: 1942-07-27
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Granted: 1947-03-11
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Expires: 1962-07-27
Abstract
No abstract record available.
Inventors
- 👤 George W Cornelius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:36
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB196937A
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GB203654A
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US1780813A
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US1843678A
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US1890079A
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US1893129A
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US1987050A
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US2124867A
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US2172813A
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US2191842A
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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) | 1950-03-10 | 1950-09-09 | 1951-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-10 | 1954-09-09 | 1955-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-10 | 1958-09-09 | 1959-03-11 | $7700.00 | Window Closed / Lapsed |