Patent US2854251A successfully refreshed from Google Patents.
US2854251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tow bars for aircraft
Assignee: B K SWEENEY Manufacturing Co
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Filing: 1956-01-16
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Granted: 1958-09-30
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Expires: 1976-01-16
Abstract
No abstract record available.
Inventors
- 👤 Edward T Able
- 👤 Ruiter John De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:16
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/14; B60D1/167; B64; B64F; B64F1/00; B64F1/22; B64F1/223; B64F1/224
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1535397A
Cited
DE463395C
Cited
US2295021A
Cited
US2287955A
Cited
US2340273A
Cited
US2391608A
Cited
US2692149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |