US3717901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refuse hoppers
Assignee: DP Way Corp
•
Filing: 1971-03-25
•
Granted: 1973-02-27
•
Expires: 1991-03-25
Abstract
Abstract A REFUSE HOPPER THAT CAN BE POSITIONED AT A CONVENIENT LOCATION IN A FOUNDRY OR FACTORY AND SEPARABLY SEALINGLY CONNECTED TO A MOBILE VACUUM CLEANING MACHINE, SAID HOPPER BEING DESIGNED TO HAVE REFUSE DRAWN INTO AND DEPOSITED THEREIN INSTEAD OF SAID REFUSE DRAWN INTO AND DIRECTLY INTO THE CLEANING MACHINE. THUS WHEN SAID HOPPER IS FILLED IT CAN BE DETACHED AND HAULED AWAY TO A REMOTE DUMPING AREA WHILE SAID CLEANING MACHINE IS CONNECTED T3 ANOTHER STRATEGICALLY PLACED HOPPER, THEREBY PERMITTING THE CONTINUOUS UTILIZATION OF SAID VACUUM CLEANING MACHINE WITHOUT REQUIRING FREQUENT INTERRUPTIONS IN ORDER TO TRANSPORT SAID MACHINE TO A REMOTE LOCATION FOR DUMPING. D R A W I N G
Inventors
- 👤 D Johnstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:06
CPC Classifications
B; B65; B65F; B65F1/00; B65F1/12; B65F1/127
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |