US3204716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stair climbing vehicle
Assignee: Individual
•
Filing: 1962-10-26
•
Granted: 1965-09-07
•
Expires: 1982-10-26
Abstract
No abstract record available.
Inventors
- 👤 Robert L Phillips
- 👤 Harley L Sheets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:08
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/06; A61G5/061; A61G5/066; B; B62; B62D; B62D55/00; B62D55/06; B62D55/075; A61G5/10; A61G5/1056; A61G5/1072; A61G5/1075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A STAIR CLIMBING VEHICLE COMPRISING, A FRAME, AXLES CARRYING DRIVE WHEELS JOURNALLED AT OPPOSITE ENDS OF THE FRAME, ENDLESS TRACKS ABOUT THE WHEELS, REVERSIBLE MEANS MOUNTED ON THE FRAME TO DRIVE THE WHEELS TO ADVANCE THE TRACKS, GUIDE MEANS MOUNTED ONT HE FRAME INTERMEDIATE THE DRIVE WHEELS SUPPORTING THE BOTTOM FLIGHTS OF THE TRACKS TO HOLD THE BOTTOM FLIGHTS IN THE PLANES OF THEIR LONGITUDINAL MOVEMENT THROUGHOUT THEIR LENGTHS, A SEAT SUPPORTED FROM THE FRAME, A MOUNT FOR THE SEAT WHICH INCLUDES AUTOMATIC MEANS TO MAINTAIN THE SEAT IN A HORIZONTAL POSITION IRRESPECTIVE OF LONGITUDINAL TILTING OF THE VEHICLE FRAME, AND THE SEAT BEING MOUNTED FOR ROTATION IN A HORIZONTAL PLANE.
Claim 2
Dependent Claim
111 words
A STAIR CLIMBING VEHICLE COMPRISING, A FRAME, AXLES CARRYING DRIVE WHEELS JOURNALLED AT OPPOSITE ENDS OF THE FRAME, ENDLESS TRACKS ABOUT THE WHEELS, REVERSIBLE MEANS MOUNTED ON THE FRAME TO DRIVE THE WHEELS TO ADVANCE THE TRACKS, GUIDE MEANS MOUNTED ONT HE FRAME INTERMEDIATE THE DRIVE WHEELS SUPPORTING THE BOTTOM FLIGHTS OF THE TRACKS TO HOLD THE BOTTOM FLIGHTS IN THE PLANES OF THEIR LONGITUDINAL MOVEMENT THROUGHOUT THEIR LENGTHS, A SEAT SUPPORTED FROM THE FRAME, A MOUNT FOR THE SEAT WHICH INCLUDES AUTOMATIC MEANS TO MAINTAIN THE SEAT IN A HORIZONTAL POSITION IRRESPECTIVE OF LONGITUDINAL TILTING OF THE VEHICLE FRAME, AND THE SEAT BEING MOUNTED FOR ROTATION IN A HORIZONTAL PLANE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |