US3268923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion washer
Assignee: Improved Machinery Inc
•
Filing: 1964-05-11
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Granted: 1966-08-30
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Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Elmer R Burling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:25
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD OF TREATING HIGH CONSISTENCY WOOD PULP COMPRISING THE STEPS OF ADVANCING UPWARDLY IN GENERALLY CYLINDRICAL COLUMNAR CONFIGURATION WITH A HEIGHT TO WIDTH RATIO OF AT LEAST 3 TO 1 A MASS OF WOOD PULP HAVING A HIGH CONSISTENCY OF FROM 10 TO 40 PERCENT BY APPLYING LIFTING FORCES SOLELY AT THE LOWER END OF SAID COLUMN, FORMING SAID MASS AT ITS UPPER END INTO A LONGITUDINALLY EXTENDED ANNULAR RING OF PULP HAVING A WALL THICKNESS OF FROM ONE TO SIX INCHES BY DIVERTING SAID PULP RADIALLY OUTWARDLY FROM ITS CENTRAL AXIS ALONG AN UPWARDLY DIVERGING CONICAL SURFACE WHILE DILUTING AT LEAST A PORTION OF SAID PULP ALONG SAID SURFACE TO A CONSISTENCY OF LESS THAN 10 PERCENT AND FLOWING A TREATING LIQUID GENERALLY RADIALLY THROUGH SAID ANNULAR RING OF PULP TO TREAT SAID PULP.
Claim 2
Independent Claim
136 words
A METHOD OF TREATING HIGH CONSISTENCY WOOD PULP COMPRISING THE STEPS OF ADVANCING UPWARDLY IN GENERALLY CYLINDRICAL COLUMNAR CONFIGURATION WITH A HEIGHT TO WIDTH RATIO OF AT LEAST 3 TO 1 A MASS OF WOOD PULP HAVING A HIGH CONSISTENCY OF FROM 10 TO 40 PERCENT BY APPLYING LIFTING FORCES SOLELY AT THE LOWER END OF SAID COLUMN, FORMING SAID MASS AT ITS UPPER END INTO A LONGITUDINALLY EXTENDED ANNULAR RING OF PULP HAVING A WALL THICKNESS OF FROM ONE TO SIX INCHES BY DIVERTING SAID PULP RADIALLY OUTWARDLY FROM ITS CENTRAL AXIS ALONG AN UPWARDLY DIVERGING CONICAL SURFACE WHILE DILUTING AT LEAST A PORTION OF SAID PULP ALONG SAID SURFACE TO A CONSISTENCY OF LESS THAN 10 PERCENT AND FLOWING A TREATING LIQUID GENERALLY RADIALLY THROUGH SAID ANNULAR RING OF PULP TO TREAT SAID PULP.
References Cited (Backward Citations)
US2990710A
Cited
US3078703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |