US2820644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine trailer steering means
Assignee: North American Aviation Corp
•
Filing: 1954-07-16
•
Granted: 1958-01-21
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Expires: 1974-07-16
Abstract
No abstract record available.
Inventors
- 👤 Mortimer P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:19
CPC Classifications
B; B62; B62D; B62D33/00; B62D33/02; B62D33/0207; B62D33/0215; B60; B60P; B60P7/00; B60P7/06; B60P7/08; B60P7/12; B62D13/00; B62D13/04; B62D63/00; B62D63/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1175312A
Cited
US1438291A
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US2107384A
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US2388692A
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US2544924A
Cited
US2650100A
Cited
US2712874A
Cited
US2674445A
Cited
US2750197A
Cited
US2727637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |