US3149688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stair-climbing power-driven tracked truck
Assignee: STAIR KING Inc
•
Filing: 1962-03-22
•
Granted: 1964-09-22
•
Expires: 1982-03-22
Abstract
No abstract record available.
Inventors
- 👤 James W Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:03
CPC Classifications
B; B62; B62B; B62B5/00; B62B5/02; B62B2301/00; B62B2301/25; B62B2301/256
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A POWERED TRUCK COMPRISING A FRAME, AN UPSTANDING STEP AT ONE END OF THE FRAME AND HANDLE MEANS AT THE OTHER END OF THE FRAME, A PAIR OF DRIVING SHEAVES SUPPORTED ON THE FRAME AT THE END THEREOF ADJACENT THE STEP, SAID DRIVING SHEAVES BEING REMOVED LONGITUDINALLY FROM THE END A DISTANCE LESS THAN THE RADIUS OF THE SAME, A PAIR OF DRIVEN SHEAVES OF THE SAME DIAMETER AS THE DRIVING SHEAVES POSITIONED ADJACENT THE DRIVING SHEAVES AND AT A DISTANCE LESS THAN THE RADIUS THEREOF LONGITUDINALLY OF THE FRAME, SHEAVE IN DRIVING RELATION THEREWITH, AND MEANS FOR DRIVING THE DRIVING SHEAVES.
Claim 2
Dependent Claim
102 words
A POWERED TRUCK COMPRISING A FRAME, AN UPSTANDING STEP AT ONE END OF THE FRAME AND HANDLE MEANS AT THE OTHER END OF THE FRAME, A PAIR OF DRIVING SHEAVES SUPPORTED ON THE FRAME AT THE END THEREOF ADJACENT THE STEP, SAID DRIVING SHEAVES BEING REMOVED LONGITUDINALLY FROM THE END A DISTANCE LESS THAN THE RADIUS OF THE SAME, A PAIR OF DRIVEN SHEAVES OF THE SAME DIAMETER AS THE DRIVING SHEAVES POSITIONED ADJACENT THE DRIVING SHEAVES AND AT A DISTANCE LESS THAN THE RADIUS THEREOF LONGITUDINALLY OF THE FRAME, SHEAVE IN DRIVING RELATION THEREWITH, AND MEANS FOR DRIVING THE DRIVING SHEAVES.
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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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |