Patent US2752048A successfully refreshed from Google Patents.
Patent US3702128A successfully refreshed from Google Patents.
US3702128A
Expired / Lapsed
US
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Solids feeder apparatus
Assignee: Celanese Corp
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Filing: 1971-03-26
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Granted: 1972-11-07
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Expires: 1991-03-26
Abstract
Abstract A SCREW CONVEYOR-TYPE APPARATUS FOR FEEDING GRANULAR SOLIDS FROM A FEED VESSEL HAVING A U-TROUGH BOTTOM TO A PRESSURIZED SYSTEM VIA A CIRCULAR CONDUIT. THE APPARATUS CONTAINS A CONTILEVERED FEED CONVEYOR SCREW SUSPENDED IN THE U-TROUGH AND EXTENDING A PORTION OF THE WAY INTO THE CIRCULAR CONDUIT AS WELL AS AN OVERHEAD REVERSE CONVEYOR SCREW WHICH RECYCLES SOLIDS AWAY FROM THE MOUTH OF THE CIRCULAR CONDUIT. THE PORTION OF THE FEED SCREW WITHIN THE FEED VESSEL IS LARGER THAN THAT PORTION EXTENDING INTO THE CIRCULAR CONDUIT.
Inventors
- 👤 Frederick J Trotter Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:09
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/06; B65G53/08
Claims Analysis
Total Claims: 0
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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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |