US2504421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft engine and fuselage arrangement
Assignee: Lockheed Martin Corp
•
Filing: 1946-04-25
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Granted: 1950-04-18
•
Expires: 1966-04-25
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Johnson
- 👤 Jr Willis M Hawkins
- 👤 Jr Alonzo B Storey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:10
CPC Classifications
B; B64; B64D; B64D27/00; B64D27/02; B64D27/16; B64D27/20; Y; Y10; Y10S; Y10S220/00; Y10S220/90; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1035454A
Cited
US1354706A
Cited
US2074098A
Cited
GB524721A
Cited
US2346178A
Cited
US2390161A
Cited
US2381426A
Cited
GB568667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |