Patent US3563891A successfully refreshed from Google Patents.
US3563891A
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US
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Liquid separation device in a cellulosic material process vessel
Assignee: Metso Fiber Karlstad AB
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Filing: 1969-01-17
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Granted: 1971-02-16
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Expires: 1989-01-17
Abstract
Abstract CHARGE CONDUITS AND EXTERIOR CONTROL VALVES BEING PROVIDED. APPARATUS FOR REMOVING LIQUID FROM CELLULOSIC PULP SUSPENSIONS COMPRISING A CYLINDRICAL CONTAINER THROUGH WHICH THE SUSPENSION IS AXIALLY MOVED AND LIQUID WITHDRAWAL MEANS COMPRISING A SET OF HOLLOW SCREEN BODIES ARRANGED CONCENTRICALLY IN THE CONTAINER AND HAVING CYLINDRICAL SCREEN FACES THROUGH WHICH THE LIQUID IS WITHDRAWN FOR DISCHARGE. DISCHARGE OF LIQUID FROM THE VARIOUS SCREEN FACES IS SEPARATELY CONTROLLED, A NUMBER OF DIS-
Inventors
- 👤 Johan C F C Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:52
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/66
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |