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US3606626A
Expired / Lapsed
US
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Motor control electrical system
Assignee: Boothe Airside Services Inc
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Filing: 1969-12-30
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Granted: 1971-09-21
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Expires: 1989-12-30
Abstract
Abstract AN ELECTRICAL SYSTEM IS PROVIDED TO LIMIT THE DEGREE OF EXPANDABLE AND ROTATABLE MOVEMENT OF A PASSENGER RAMP OF A VEHICLE ADAPTED TO PROVIDE A WALKWAY FROM THE VEHICLE TO A TERMINAL. PROPER ALIGNMENT OF THE RAMP IS ASSURED DURING EXPANSION AND RETRACTION OPERATIONS.
Inventors
- 👤 Walter S Eggert Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:04
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/30; B64F1/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |