Patent US2614923A successfully refreshed from Google Patents.
US2614923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digester filling in sulfate pulping
Assignee: Sunila Osakeyhtio
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Filing: 1947-02-01
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Granted: 1952-10-21
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Expires: 1967-02-01
Abstract
No abstract record available.
Inventors
- 👤 Tarkkonen Oma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:09
CPC Classifications
D; D21; D21C; D21C1/00; D21C1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE PROCESS OF MANUFACTURING SULPHATE PULP WHICH COMPRISES THE FOLLOWING STEPS, SIMULTANEOUSLY CHARGING A DIGESTER WITH CHIPS AND WITH BLACK LIQUOR UNDER PRESSURE, WHICH BLACK LIQUOR HAS BEEN OBTAINED FROM A PREVIOUS COMPLETED SULFATE COOK, AND THEREBY PACKING THE CHIPS INTO THE DIGESTER WITH SAID BLACK LIQUOR, SAID BLACK LIQUOR BEING SUBSTANTIALLY UNDER THE SAME TEMPERATURE AND PRESSURE THAT IT HAD WHEN WITHDRAWN FROM SAID PREVIOUS COOK, SAID BLACK LIQUOR IN SAID CHARGING OPERATION BEING IN SUFFICIENT AMOUNT TO PARTICALLY IMPREGNATE THE WHOLE OF SAID CHARGE OF CHIPS ARE PACKED IN SAID AFTER SAID IMPREGNATED CHIPS ARE PACKED IN SAID WHITE LIQUOR TO SAID DIGESTER TO DIGEST SAID IMDIGESTER, THEN ADDING THE REQUISITE AMOUNT OF PREGNATED CHIPS.
Claim 2
Dependent Claim
117 words
THE PROCESS OF MANUFACTURING SULPHATE PULP WHICH COMPRISES THE FOLLOWING STEPS, SIMULTANEOUSLY CHARGING A DIGESTER WITH CHIPS AND WITH BLACK LIQUOR UNDER PRESSURE, WHICH BLACK LIQUOR HAS BEEN OBTAINED FROM A PREVIOUS COMPLETED SULFATE COOK, AND THEREBY PACKING THE CHIPS INTO THE DIGESTER WITH SAID BLACK LIQUOR, SAID BLACK LIQUOR BEING SUBSTANTIALLY UNDER THE SAME TEMPERATURE AND PRESSURE THAT IT HAD WHEN WITHDRAWN FROM SAID PREVIOUS COOK, SAID BLACK LIQUOR IN SAID CHARGING OPERATION BEING IN SUFFICIENT AMOUNT TO PARTICALLY IMPREGNATE THE WHOLE OF SAID CHARGE OF CHIPS ARE PACKED IN SAID AFTER SAID IMPREGNATED CHIPS ARE PACKED IN SAID WHITE LIQUOR TO SAID DIGESTER TO DIGEST SAID IMDIGESTER, THEN ADDING THE REQUISITE AMOUNT OF PREGNATED CHIPS.
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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |