US2596875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of handling waste sulfite liquor
Assignee: Weyerhaeuser Timber Co
•
Filing: 1950-05-26
•
Granted: 1952-05-13
•
Expires: 1970-05-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF BURNING CONCENTRATED WASTE LIQUOR FROM THE DIGESTION OF LIGNO-CELLULOSE MATERIAL WHICH COMPRISES CONCENTRATION THE LIQUOR BY MULTIPLE EFFECT EVAPORATION WITH AT LEAST THE LAST EFFECT MAINTAINED AT OVER-ATMOSPHERIC PRESSURE, DELIVERING THE LIQUOR AST THE OVER-ATMOSPHERIC PRESSURE THEREIN TO A STORAGE CONTAINER, MAINTAINING THE PRESSURE IN THE STORAGE CONTAINER SUBSTANTIALLY AT THAT OF THE LAST EFFECT, THEREBY CONSERVING THE HEAT IN THE CONCENTRATED LIQUOR, AND DELIVERING THE HEATED LIQUOR AT SUBSTANTIALLY THE TEMPERATURE MAINTAINED IN THE STORAGE CONTAINER TO THE BURNING ZONE.
Claim 2
Independent Claim
84 words
THE METHOD OF BURNING CONCENTRATED WASTE LIQUOR FROM THE DIGESTION OF LIGNO-CELLULOSE MATERIAL WHICH COMPRISES CONCENTRATION THE LIQUOR BY MULTIPLE EFFECT EVAPORATION WITH AT LEAST THE LAST EFFECT MAINTAINED AT OVER-ATMOSPHERIC PRESSURE, DELIVERING THE LIQUOR AST THE OVER-ATMOSPHERIC PRESSURE THEREIN TO A STORAGE CONTAINER, MAINTAINING THE PRESSURE IN THE STORAGE CONTAINER SUBSTANTIALLY AT THAT OF THE LAST EFFECT, THEREBY CONSERVING THE HEAT IN THE CONCENTRATED LIQUOR, AND DELIVERING THE HEATED LIQUOR AT SUBSTANTIALLY THE TEMPERATURE MAINTAINED IN THE STORAGE CONTAINER TO THE BURNING ZONE.
References Cited (Backward Citations)
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US2078288A
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US2196498A
Cited
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US2354175A
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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) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |