Patent US3370664A successfully refreshed from Google Patents.
US3370664A
Expired / Lapsed
US
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Motorized stair-climbing shopping cart
Assignee: ALLEN E CAPLAN
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Filing: 1966-08-25
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Granted: 1968-02-27
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Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 Allen E Caplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:42
CPC Classifications
B; B62; B62B; B62B5/00; B62B5/02; A; A45; A45C; A45C5/00; A45C5/14; A45C2005/147; B62B2301/00; B62B2301/25; B62B2301/256
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A VEHICLE COMPRISING A CHASSIS INCLUDING FRONT AND REAR AXLES, PAIRS OF WHEELS MOUNTED ON EACH OF SAID AXLES, A PRIME MOVER ON SAID CHASSIS CONNECTED TO ONE OF SAID AXLES, RESILIENT ENDLESS BELT TREADS, ENGAGED ABOUT SAID WHEELS AND EXTENDING BETWEEN SAID AXLES, SAID TREADS BEING SUBSTANTIALLY WIDER THAN SAID WHEELS AND LEAVING THE EDGES THEREOF EXTENDING BEYOND SAID WHEELS, THE OUTER SURFACE OF SAID TREADS HAVING CENTRAL PORTIONS OF REDUCED CROSS SECTIONAL THICKNESS FOR INCREASING THE FLEXIBILITY OF SAID TREADS, SAID TREADS HAVING LUG MEANS ON THE EDGES OF THE OUTER SURFACE THEREOF, AT LEAST ONE OF SAID WHEELS DRIVING SAID TREADS, SAID TREADS BEING TAUTLY STRETCHED OVER SAID WHEELS SO THAT SAID DETENTS ARE PULLED RADIALLY INWARDLY TOWARDS THE CENTER OF SAID WHEELS AT THE PORTIONS
Claim 2
Dependent Claim
129 words
A VEHICLE COMPRISING A CHASSIS INCLUDING FRONT AND REAR AXLES, PAIRS OF WHEELS MOUNTED ON EACH OF SAID AXLES, A PRIME MOVER ON SAID CHASSIS CONNECTED TO ONE OF SAID AXLES, RESILIENT ENDLESS BELT TREADS, ENGAGED ABOUT SAID WHEELS AND EXTENDING BETWEEN SAID AXLES, SAID TREADS BEING SUBSTANTIALLY WIDER THAN SAID WHEELS AND LEAVING THE EDGES THEREOF EXTENDING BEYOND SAID WHEELS, THE OUTER SURFACE OF SAID TREADS HAVING CENTRAL PORTIONS OF REDUCED CROSS SECTIONAL THICKNESS FOR INCREASING THE FLEXIBILITY OF SAID TREADS, SAID TREADS HAVING LUG MEANS ON THE EDGES OF THE OUTER SURFACE THEREOF, AT LEAST ONE OF SAID WHEELS DRIVING SAID TREADS, SAID TREADS BEING TAUTLY STRETCHED OVER SAID WHEELS SO THAT SAID DETENTS ARE PULLED RADIALLY INWARDLY TOWARDS THE CENTER OF SAID WHEELS AT THE PORTIONS
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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |