US2505604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Droppable wing-tip tank
Assignee: RTX Corp
•
Filing: 1947-02-01
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Granted: 1950-04-25
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Expires: 1967-02-01
Abstract
No abstract record available.
Inventors
- 👤 John R Clark
- 👤 Donald L Mcfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:49
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/02; B64D37/06; B64D37/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |