US3567573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digester discharge system
Assignee: Bauer Brothers Co
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Filing: 1968-09-25
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Granted: 1971-03-02
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Expires: 1988-09-25
Abstract
Abstract A PROCESS FOR SIMPLY REFINING FIBROUS MATERIALS SUCH AS WOOD CHIPS CHARACTERIZED BY A SERIES RELATED PAIR OF VESSELS IN THE FIRST OF WHICH THE RAW MATERIALS ARE FULLY SATURATED WITH CONDITIONING FLUIDS WHICH SUBSTANTIALLY DISSOLVE THE BONDING AGENTS BETWEEN THEIR FIBERS WITHOUT SIGNIFICANTLY AFFECTING THEIR SHAPE AND IN THE SECOND OF WHICH THE MATERIAL IS CAUSED TO AUTOMATICALLY SPLIT TO FIBER FORM AND BE WASHED AND COOLED PRIOR TO EXIT TO A BLOW TANK OR OTHER HOLDING OR TRANSITION UNIT.
Inventors
- 👤 Philip D Case
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:33
CPC Classifications
D; D21; D21C; D21C7/00; D21C7/08
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |