Patent US2712488A successfully refreshed from Google Patents.
US2712488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for washing pulp
Assignee: Individual
•
Filing: 1949-11-12
•
Granted: 1955-07-05
•
Expires: 1969-11-12
Abstract
No abstract record available.
Inventors
- 👤 Brax Antti Jussi
- 👤 Markila Lennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:56
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/02; D21C9/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
A STRAINER COMPARTMENT FOR PULP WASHING APPARATUS WHICH COMPRISES, AN ELONGATED BASE, SAID BASE INCREASING IN WIDTH FROM ONE END TO THE OTHER THEROF, AN IMPERFORATE END WALL EXTENDING SUBSTANTIALLY LATERALLY UPWARDLY FROM SAID BASE, AND A PAIR OF SIDE WALLS EXTENDING UPWARDLY FROM THE LONGITUDINAL EDGES OF SAID BASE, SAID SIDE WALLS CONVERGING INTO A JOINING ELEMENT ALONG THE TOPS THEREOF, AND SAID SIDE WALLS BEING ENGAGED WITH SAID END WALL, FORMING AN ENCLOSURE DEFINED BY SAID BASE, SAID END WALL, SAID JOINING ELEMENT AND SAID SIDE WALLS, SAID SIDE WALLS BEING FORMED WITH PERFORATIONS THROUGHOUT A SUBSTANTIAL PORTION OF THEIR HEIGHT FOR DRAINING LIQUID THERETHROUGH, AND SAID BASE BEING PROVIDED WITH MEANS FOR DRAINING OF SAID LIQUID
Claim 2
Dependent Claim
119 words
A STRAINER COMPARTMENT FOR PULP WASHING APPARATUS WHICH COMPRISES, AN ELONGATED BASE, SAID BASE INCREASING IN WIDTH FROM ONE END TO THE OTHER THEROF, AN IMPERFORATE END WALL EXTENDING SUBSTANTIALLY LATERALLY UPWARDLY FROM SAID BASE, AND A PAIR OF SIDE WALLS EXTENDING UPWARDLY FROM THE LONGITUDINAL EDGES OF SAID BASE, SAID SIDE WALLS CONVERGING INTO A JOINING ELEMENT ALONG THE TOPS THEREOF, AND SAID SIDE WALLS BEING ENGAGED WITH SAID END WALL, FORMING AN ENCLOSURE DEFINED BY SAID BASE, SAID END WALL, SAID JOINING ELEMENT AND SAID SIDE WALLS, SAID SIDE WALLS BEING FORMED WITH PERFORATIONS THROUGHOUT A SUBSTANTIAL PORTION OF THEIR HEIGHT FOR DRAINING LIQUID THERETHROUGH, AND SAID BASE BEING PROVIDED WITH MEANS FOR DRAINING OF SAID LIQUID
Claim 3
Dependent Claim
90 words
THE PROCESS WASHING PULP BLOWN FROM A DIGESTER TO REMOVE THE COOKING LIQUOR THEREFROM AND COVER SUCH LIQUOR IN SUBSTANTIALLY UNDILUTED STATE WHICH COMPRISES, CONFINING A QUANTITY OF PULP CARRYING SUCH LIQUOR, WASHING SAID COOKING LIQUOR FROM PULP BY INTRODUCING WASHING LIQUID ON TOP OF SAID PULP, DRAWING OFF THE SUBSTANTIALLY UNDILUTED COOKING LIQUOR WASHED FROM SAID PULP THROUGH AN AREA EXTENDING BOTH LONGITUDINALLY AND VERTICALLY INTO SAID QUANTITY OF PULP AND TERMINATING SAID DRAWING ACTION WHEN COOKING LIQUOR DILUTED BY SAID WASHING LIQUID COMMENCES TO FLOW THROUGH SAID AREA.
Claim 4
Dependent Claim
90 words
THE PROCESS WASHING PULP BLOWN FROM A DIGESTER TO REMOVE THE COOKING LIQUOR THEREFROM AND COVER SUCH LIQUOR IN SUBSTANTIALLY UNDILUTED STATE WHICH COMPRISES, CONFINING A QUANTITY OF PULP CARRYING SUCH LIQUOR, WASHING SAID COOKING LIQUOR FROM PULP BY INTRODUCING WASHING LIQUID ON TOP OF SAID PULP, DRAWING OFF THE SUBSTANTIALLY UNDILUTED COOKING LIQUOR WASHED FROM SAID PULP THROUGH AN AREA EXTENDING BOTH LONGITUDINALLY AND VERTICALLY INTO SAID QUANTITY OF PULP AND TERMINATING SAID DRAWING ACTION WHEN COOKING LIQUOR DILUTED BY SAID WASHING LIQUID COMMENCES TO FLOW THROUGH SAID AREA.
References Cited (Backward Citations)
US247280A
Cited
US386515A
Cited
US404078A
Cited
US513215A
Cited
US617029A
Cited
US640203A
Cited
US654647A
Cited
US691706A
Cited
US932696A
Cited
US962324A
Cited
US1081515A
Cited
US1383433A
Cited
US1516593A
Cited
US1560881A
Cited
US1541371A
Cited
US1836862A
Cited
AT141496B
Cited
GB458863A
Cited
US2086180A
Cited
US2430135A
Cited
US2534324A
Cited
US2505851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-04 | 1959-01-03 | 1959-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-04 | 1963-01-03 | 1963-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-04 | 1967-01-03 | 1967-07-05 | $7700.00 | Window Closed / Lapsed |