Patent US212732A successfully refreshed from Google Patents.
Patent US3564631A successfully refreshed from Google Patents.
US3564631A
Expired / Lapsed
US
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Pulp treating apparatus and method
Assignee: Improved Machinery Inc
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Filing: 1968-05-16
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Granted: 1971-02-23
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Expires: 1988-05-16
Abstract
Abstract AN APPARATUS FOR TREATING PULP, COMPRISING A PAIR OF PLATENS HAVING ADJACENT PERFORATE WALLS SPACED TO FORM OPPOSING SIDES OF AN ELONGATED PROCESSING CHAMBER AND CONSTRUCTED TO CAUSE THE CHAMBER TO INCLUDE AT LEAST A PAIR OF NARROWING PRESSING ZONES INTERCONNECTED BY AN INTERMEDIATE WIDENING EXPANDING ZONE. A PAIR OF PERFORATE CONVERYING BELTS ARE LONGITUDINALLY DRIVEN THROUGH THE CHAMBER ADJACENT THE PERFORATE WALLS FOR TRNASPORTING PULP THERETHROUGH; AND CONDUITS ARE CONNECTED TO THE PRESSING AND EXPANDING ZONES FOR, RESPECTIVELY, DRAINING LIQUID THEREFROM AND SUPPLYING DILUTION LIQUID THERETO. ALSO A METHOD FOR TREATING PULP THROUGH THE EMPLOYMENT OF THIS APPARATUS.
Inventors
- 👤 Elmer R Burling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:55
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/18; D21C9/02; D21C9/06
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |