Patent US2727441A successfully refreshed from Google Patents.
US2727441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulp screens
Assignee: Combined Locks Paper Co
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Filing: 1951-08-09
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Granted: 1955-12-20
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Expires: 1971-08-09
Abstract
No abstract record available.
Inventors
- 👤 Hervey G Cram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:23
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; D21D5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A SCREEN FOR PULP, A CASING FORMING AN UPSTREAM CHAMBER, SAID CHAMBER HAVING A TROUGH EXTENDING ANNULARLY ABOUT THE INNER PERIPHERY OF SAID CHAMBER FOR THE COLLECTION OF REJECTED PULP, AN INLET FOR PULP IN SAID CHAMBER, A RESTRICTED BLEED-OFF OUTLET IN THE WALL OF SAID TROUGH AT THE HIGHEST POINT THEREOF ABOVE SAID INLET, A SCREEN AT ONE SIDE OF SAID CHAMBER HAVING ITS PERIPHERY TERMINATING AT SAID TROUGH AND TO ONE SIDE THEREOF, RUNNERS ROTATABLY MOUNTED IN SAID CHAMBER, MEANS FOR ROTATING SAID RUNNERS TO IMPART A CIRCUMFERENTIAL AND RADIAL MOVEMENT TO PULP ENTERING SAID INLET, AND A CIRCUMFERENTIALLY EXTENDING BAFFLE CLOSING SAID TROUGH EXCEPT FOR A RESTRICTED SLOT-LIKE OPENING RUNNING AROUND SAID CHAMBER ON THE DOWNSTREAM SIDE OF SAID RUNNERS, AND LEADING TO SAID TROUGH.
Claim 2
Dependent Claim
129 words
IN A SCREEN FOR PULP, A CASING FORMING AN UPSTREAM CHAMBER, SAID CHAMBER HAVING A TROUGH EXTENDING ANNULARLY ABOUT THE INNER PERIPHERY OF SAID CHAMBER FOR THE COLLECTION OF REJECTED PULP, AN INLET FOR PULP IN SAID CHAMBER, A RESTRICTED BLEED-OFF OUTLET IN THE WALL OF SAID TROUGH AT THE HIGHEST POINT THEREOF ABOVE SAID INLET, A SCREEN AT ONE SIDE OF SAID CHAMBER HAVING ITS PERIPHERY TERMINATING AT SAID TROUGH AND TO ONE SIDE THEREOF, RUNNERS ROTATABLY MOUNTED IN SAID CHAMBER, MEANS FOR ROTATING SAID RUNNERS TO IMPART A CIRCUMFERENTIAL AND RADIAL MOVEMENT TO PULP ENTERING SAID INLET, AND A CIRCUMFERENTIALLY EXTENDING BAFFLE CLOSING SAID TROUGH EXCEPT FOR A RESTRICTED SLOT-LIKE OPENING RUNNING AROUND SAID CHAMBER ON THE DOWNSTREAM SIDE OF SAID RUNNERS, AND LEADING TO SAID TROUGH.
References Cited (Backward Citations)
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US1679371A
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US1585817A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |