US3608446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material delivery system
Assignee: Arkansas Rock and Gravel Co
•
Filing: 1969-08-22
•
Granted: 1971-09-28
•
Expires: 1989-08-22
Abstract
Abstract HOT ASPHALT TRANSPORTED TO PAVING MACHINES IN A FLEET OF SEMI-TRAILERS. EACH TRAILER COMPRISES A V-SHAPED HOPPER HAVING BRIDGING MEMBERS EXTENDING ACROSS IT FOR REDUCING ASPHALT PACKING IN THE HOPPER. HEAT DUCTS EXTEND THROUGH THE STRUCTURAL MEMBERS OF EACH TRAILER FOR USE IN PREHEATING THE HOPPER. EACH TRAILER INCLUDES A CONVEYOR FOR UNLOADING THE ASPHALT FROM THE HOPPER TO A PAVING MACHINE. DURING UNLOADING, THE CONVEYOR IS CONTROLLED FROM THE PAVING MACHINE. THIS ASSURES THE DELIVERY OF ASPHALT AT THE PROPER RATE AND PREVENTS THE UNLOADING OF ASPHALT WHEN THE TRAILER AND THE PAVING MACHINE ARE SEPARATED.
Inventors
- 👤 Robert Dale Plant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:09
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/36; B60P1/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |