Patent US2981548A successfully refreshed from Google Patents.
US2981548A
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Elevating trailer with laterally shiftable frame
Assignee: Northrop Grumman Corp
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Filing: 1959-10-08
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Granted: 1961-04-25
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Expires: 1979-10-08
Abstract
No abstract record available.
Inventors
- 👤 Allan J Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:21
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/02; B62; B62D; B62D13/00; B62D13/04; B64; B64F; B64F5/00; B64F5/50; B66; B66F; B66F7/00; B66F7/06; B66F7/0625; B66F7/0633; B66F7/08
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |