US2734037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of introducing sulfite waste
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:53
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A PROCESS OF PREPARING CAUSTICIZED, SULFIDE-CONTAINING SODA LIQUORS FOR ALKALINE CELLULOSE DIGESTION, WHICH INCLUDES DISSOLVING SODA SMELT OBTAINED FROM THE ALKALI REGENERATION PROCESS OF THE ALKALI CELLULOSE SYSTEM IN SULFITE WASTE LIQUOR, CAUSTICIZING THE RESULTING SOLUTION OF SODA SMELT IN SULFITE WASTE LIQUOR WITH LIME AND SEPARATING THE RESULTING CAUSTICIZED SODA LIQUOR FROM LIME-SLUDGE FORMED BY THE CAUSTICIZATION, THE STEPS OF TREATING SAID SEPARATED LIME-SLUDGE WITH A QUANTITY OF THE UNCAUSTICIZED SOLUTION OF SODA SMELT IN SULFITE WASTE LIQUOR, WASHING THE LIME-SLUDGE TREATED IN THIS MANNER WITH FRESH SULFITE WASTE LIQUOR AND DISSOLVING A NEW AMOUNT OF SMELT SODA IN THE SULFITE WASTE LIQUOR, WHICH HAS BEEN USED FOR WASHING SAID LIME-SLUDGE.
Claim 2
Dependent Claim
113 words
IN A PROCESS OF PREPARING CAUSTICIZED, SULFIDE-CONTAINING SODA LIQUORS FOR ALKALINE CELLULOSE DIGESTION, WHICH INCLUDES DISSOLVING SODA SMELT OBTAINED FROM THE ALKALI REGENERATION PROCESS OF THE ALKALI CELLULOSE SYSTEM IN SULFITE WASTE LIQUOR, CAUSTICIZING THE RESULTING SOLUTION OF SODA SMELT IN SULFITE WASTE LIQUOR WITH LIME AND SEPARATING THE RESULTING CAUSTICIZED SODA LIQUOR FROM LIME-SLUDGE FORMED BY THE CAUSTICIZATION, THE STEPS OF TREATING SAID SEPARATED LIME-SLUDGE WITH A QUANTITY OF THE UNCAUSTICIZED SOLUTION OF SODA SMELT IN SULFITE WASTE LIQUOR, WASHING THE LIME-SLUDGE TREATED IN THIS MANNER WITH FRESH SULFITE WASTE LIQUOR AND DISSOLVING A NEW AMOUNT OF SMELT SODA IN THE SULFITE WASTE LIQUOR, WHICH HAS BEEN USED FOR WASHING SAID LIME-SLUDGE.
References Cited (Backward Citations)
US1834676A
Cited
US2552183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |