Patent US2905604A successfully refreshed from Google Patents.
US2905604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for electrolytically treating black liquor
Assignee: Individual
•
Filing: 1956-01-05
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Granted: 1959-09-22
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Expires: 1976-01-05
Abstract
No abstract record available.
Inventors
- 👤 Absalom M Kennedy
- 👤 John M Jernigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:55
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0042; C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/1651
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR TREATING SUBSTANTIALLY OIL AND RESIN FREE ALKALINE BLACK LIQUOR OBTAINED FROM THE PRODUCTION OF CELLULOSE PULP WHICH COMPRISES INTRODUCING SAID OIL AND RESIN FREE ALKALINE BLACK LIQUOR INTO AN UNDIVIDED ELECTROLYTIC CELL WHEREBY SAID LIQUOR IS IN DIRECT CONTACT WITH THE CATHODE OF THE CELL AND IS THE SOLE ELECTROLYTE FOR THE CELL, PASSING A DIRECT CURRENT OF ELECTRICITY THROUGH SAID CELL WHEREBY THE LIGNIN CONTENT OF THE BLACK LIQUOR IS DEPOSITION CONTINOUSLY ON THE AMODE OF THE CELL AND CONCENTRATED ALKALINE LIQUOR IS PRODUCED CONTINUOUSLY ADJACENT THE CATHODE OF THE CELL, REMOVING THE DEPOSITIED LIGNIN CONTINUOUSLY FROM SAID ANODE, AND REMOVING THE CONCENTRATED ALKALINE LIQUOR FROM THE LOWER PROTION OF SAID CELL.
Claim 2
Dependent Claim
116 words
A PROCESS FOR TREATING SUBSTANTIALLY OIL AND RESIN FREE ALKALINE BLACK LIQUOR OBTAINED FROM THE PRODUCTION OF CELLULOSE PULP WHICH COMPRISES INTRODUCING SAID OIL AND RESIN FREE ALKALINE BLACK LIQUOR INTO AN UNDIVIDED ELECTROLYTIC CELL WHEREBY SAID LIQUOR IS IN DIRECT CONTACT WITH THE CATHODE OF THE CELL AND IS THE SOLE ELECTROLYTE FOR THE CELL, PASSING A DIRECT CURRENT OF ELECTRICITY THROUGH SAID CELL WHEREBY THE LIGNIN CONTENT OF THE BLACK LIQUOR IS DEPOSITION CONTINOUSLY ON THE AMODE OF THE CELL AND CONCENTRATED ALKALINE LIQUOR IS PRODUCED CONTINUOUSLY ADJACENT THE CATHODE OF THE CELL, REMOVING THE DEPOSITIED LIGNIN CONTINUOUSLY FROM SAID ANODE, AND REMOVING THE CONCENTRATED ALKALINE LIQUOR FROM THE LOWER PROTION OF SAID CELL.
References Cited (Backward Citations)
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Cited
US1062016A
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US1435886A
Cited
US1750177A
Cited
US1770789A
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US2743220A
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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) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |