US2547226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means of attaching wing tip fuel tanks to airplanes
Assignee: Northrop Grumman Corp
•
Filing: 1948-07-03
•
Granted: 1951-04-03
•
Expires: 1968-07-03
Abstract
No abstract record available.
Inventors
- 👤 Harold E Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:43
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/02; B64D37/06; B64D37/12; Y; Y02; Y02T; Y02T50/00; Y02T50/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2346977A
Cited
US2416104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |