Patent US3291503A successfully refreshed from Google Patents.
US3291503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically steerable trailer
Assignee: Individual
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Filing: 1964-11-12
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Granted: 1966-12-13
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Expires: 1984-11-12
Abstract
No abstract record available.
Inventors
- 👤 Lay Manford S De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:24
CPC Classifications
B; B62; B62D; B62D13/00; B62D13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A VEHICULAR TRAILER ADAPTED TO BE TRACTIVELY DRAWN BY A PRINCIPAL VEHICLE; AND TRAILER COMPRISING A LOADCARRY FRAME, AN UNDERFRAME HAVING A STEERABLE WHEELS, MEANS OPERATIVELY CONNECTING THE LOAD-CARRYING FRAME AND THE UNDERFRAME SO THAT THE LOAD-CARRYING FRAME IS SUPPORTED BY THE UNDERFRAME IN SUCH A MANNER THAT THE LOAD-CARRYING FRAME IS FREE TO SHIFT LATERALLY WITH RESPECT TO THE UNDERFRAME RESPONSIVE TO TURNING MOVEMENTS OF THE PRINCIPAL VEHICLE, AND MEANS OPERATIVELY CONNECTED LATERAL SHIFTING MOVEMENTS OF THE LOAD-CARRYING FRAME.
Claim 2
Dependent Claim
80 words
A VEHICULAR TRAILER ADAPTED TO BE TRACTIVELY DRAWN BY A PRINCIPAL VEHICLE; AND TRAILER COMPRISING A LOADCARRY FRAME, AN UNDERFRAME HAVING A STEERABLE WHEELS, MEANS OPERATIVELY CONNECTING THE LOAD-CARRYING FRAME AND THE UNDERFRAME SO THAT THE LOAD-CARRYING FRAME IS SUPPORTED BY THE UNDERFRAME IN SUCH A MANNER THAT THE LOAD-CARRYING FRAME IS FREE TO SHIFT LATERALLY WITH RESPECT TO THE UNDERFRAME RESPONSIVE TO TURNING MOVEMENTS OF THE PRINCIPAL VEHICLE, AND MEANS OPERATIVELY CONNECTED LATERAL SHIFTING MOVEMENTS OF THE LOAD-CARRYING FRAME.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |