Patent US2511504A successfully refreshed from Google Patents.
US2511504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airplane wing and slotted flap
Assignee: Lockheed Martin Corp
•
Filing: 1946-11-08
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Granted: 1950-06-13
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Expires: 1966-11-08
Abstract
No abstract record available.
Inventors
- 👤 Willis M Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:48
CPC Classifications
B; B64; B64C; B64C21/00; B64C21/02; B64C21/025; B64C2230/00; B64C2230/04; B64C2230/06; B64C2230/20; Y; Y02; Y02T; Y02T50/00; Y02T50/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1726118A
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US1830122A
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US2041792A
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US2169416A
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FR850410A
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US2406916A
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US2406917A
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US2406918A
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US2340396A
Cited
US2334975A
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US2421694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |