US3113833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for combustion of waste liquors
Assignee: Individual
•
Filing: 1960-06-15
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Granted: 1963-12-10
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Expires: 1980-06-15
Abstract
No abstract record available.
Inventors
- 👤 Bergstrom Hilding Olof Vidar
- 👤 Furrer Ake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:29
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/12; D21C11/125; Y; Y10; Y10S; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A METHOD OF RECOVERING CHEMICALS FROM BLACK LIQUOR FROM THE SULFATE PROCESS OF PULP MAKING, THE STEPS COMPRISING PARTIALLY OXIDIZING THE BLACK LIQUOR BY EXPOSING THE BLACK LIQUOR TO AIR AT A TEMPERATURE BELOW THE BOILING POINT AND AT ABOUT 170*F., CONCENTRATING THE THUS TREATED LIQUOR TO ABOUT 50% TO 60% SOLIDS, FORCEFULLY SPRAYING THE PARTIALLY OXIDIZED BLACK LIQUOR INTO A COMBUSTION FURNACE CONTAINING HOT GASES IN A MANNER TO CAUSE THE DROPLETS OF THE SPRAYED LIQUOR TO FALL DIRECTLY TOWARD THE BOTTOM OF THE FURNACE, BECOME DEHYDRATED AND BE DEPOSITED IN THE FORM OF A POROUS HEAP OF DRY PARTICLES OF THE BLACK LIQUOR FLOATING ON THE MASS OF MOLTEN SODA
Claim 2
Dependent Claim
113 words
IN A METHOD OF RECOVERING CHEMICALS FROM BLACK LIQUOR FROM THE SULFATE PROCESS OF PULP MAKING, THE STEPS COMPRISING PARTIALLY OXIDIZING THE BLACK LIQUOR BY EXPOSING THE BLACK LIQUOR TO AIR AT A TEMPERATURE BELOW THE BOILING POINT AND AT ABOUT 170*F., CONCENTRATING THE THUS TREATED LIQUOR TO ABOUT 50% TO 60% SOLIDS, FORCEFULLY SPRAYING THE PARTIALLY OXIDIZED BLACK LIQUOR INTO A COMBUSTION FURNACE CONTAINING HOT GASES IN A MANNER TO CAUSE THE DROPLETS OF THE SPRAYED LIQUOR TO FALL DIRECTLY TOWARD THE BOTTOM OF THE FURNACE, BECOME DEHYDRATED AND BE DEPOSITED IN THE FORM OF A POROUS HEAP OF DRY PARTICLES OF THE BLACK LIQUOR FLOATING ON THE MASS OF MOLTEN SODA
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) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |