US2650047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable camber wing
Assignee: Douglas Aircraft Co Inc
•
Filing: 1949-01-22
•
Granted: 1953-08-25
•
Expires: 1969-01-22
Abstract
No abstract record available.
Inventors
- 👤 Nathan A Carhart
- 👤 Eliot F Stoner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:31
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/38; B64C3/44; B64C3/48; Y; Y02; Y02T; Y02T50/00; Y02T50/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1506146A
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US1766107A
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US1763888A
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US1890059A
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US2254304A
Cited
US2365382A
Cited
US2312546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |