Patent US2557174A successfully refreshed from Google Patents.
US2557174A
Expired / Lapsed
US
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Apparatus for pulping paper stock
Assignee: COWLES CO
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Filing: 1949-01-26
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Granted: 1951-06-19
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Expires: 1969-01-26
Abstract
No abstract record available.
Inventors
- 👤 Cowles Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:34
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
APPARATUS FOR DEFIBERING PAPER STOCK, COMPRISING, IN COMBINATION, A TANK, NA IMPELLER MOUNTED FOR ROTATION WITHIN SAID TANK, MEANS ON SAID IMPELLER TO DISCHARGE STOCK OUTWARDLY FROM THE PERIPHERY OF SAID IMPELLER, AND A BAFFLE WALL WITHIN SAID TANK, SAID BAFFLE WALL EXTENDING UPWARDLY FROM THE BOTTOM OF TANK, AND BEING SPACED OUTWARDLY FROM THE PERIPHERY OF SAID IMPELLER AND EXTENDING ACROSS THE PATH OF THE STOCK DISCHARGED FROM A PORTION ONLY OF SAID IMPELLER AND DEFLECTING THE STOCK DISCHARGED THEREAGAINST IN AN UPWARD DIRECTION, ONE END OF SAID BAFFLE WALL BEING JOINED TO THE WALL OF TANK, AND THE OTHER END OF SAID BAFFLE WALL BEING SPACED FROM THE WALL OF THE TANK.
Claim 2
Dependent Claim
114 words
APPARATUS FOR DEFIBERING PAPER STOCK, COMPRISING, IN COMBINATION, A TANK, NA IMPELLER MOUNTED FOR ROTATION WITHIN SAID TANK, MEANS ON SAID IMPELLER TO DISCHARGE STOCK OUTWARDLY FROM THE PERIPHERY OF SAID IMPELLER, AND A BAFFLE WALL WITHIN SAID TANK, SAID BAFFLE WALL EXTENDING UPWARDLY FROM THE BOTTOM OF TANK, AND BEING SPACED OUTWARDLY FROM THE PERIPHERY OF SAID IMPELLER AND EXTENDING ACROSS THE PATH OF THE STOCK DISCHARGED FROM A PORTION ONLY OF SAID IMPELLER AND DEFLECTING THE STOCK DISCHARGED THEREAGAINST IN AN UPWARD DIRECTION, ONE END OF SAID BAFFLE WALL BEING JOINED TO THE WALL OF TANK, AND THE OTHER END OF SAID BAFFLE WALL BEING SPACED FROM THE WALL OF THE TANK.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |