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US2869999A
Expired / Lapsed
US
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Process for the production of sulphur, metal oxides and metal sulphates
Assignee: Individual
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Filing: 1957-02-25
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Granted: 1959-01-20
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Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 Rosenqvist Terkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:26
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C01; C01B; C01B13/00; C01B13/14; C01B13/32; C01B13/322; C01B17/00; C01B17/02; C01B17/06; C22B1/14; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS OF TREATING HEAVY METAL SULPHIDE ORES TO PRODUCE SULPHUR, METAL OXIDES AND METAL SULPHATES, COMPRISING INTRODUCING THE ORE INTO THE UPPER PORTION OF A TREATING ZONE FOR DOWNWARD MOVEMENT THROUGH THE SAME, ROASTING THE ORE WITH AIR AT AN INTERMEDIATE REGION IN THE ZONE, DISTILLING OFF PYRITIC SULPHUR FROM THE ORE AT A REGION ABOVE THE ROASTING REGION, AND INTRODUCING A REDUCING GAS DIRECTLY INTO THE TREATING ZONE AT A REGION BETWEEN THE ROASTING AND DISTILLATION REGIONS TO REDUCE THE SULPHUR DIOXIDE FORMED BY ROASTING THE ORE AND TO UTILIZE THE HEAT OF REACTION IN THE REDUCTION OF THE SULPHUR DIOXIDE TO DISTILL OFF THE SULPHUR FORMED IN THE REDUCTION.
Claim 2
Dependent Claim
112 words
A PROCESS OF TREATING HEAVY METAL SULPHIDE ORES TO PRODUCE SULPHUR, METAL OXIDES AND METAL SULPHATES, COMPRISING INTRODUCING THE ORE INTO THE UPPER PORTION OF A TREATING ZONE FOR DOWNWARD MOVEMENT THROUGH THE SAME, ROASTING THE ORE WITH AIR AT AN INTERMEDIATE REGION IN THE ZONE, DISTILLING OFF PYRITIC SULPHUR FROM THE ORE AT A REGION ABOVE THE ROASTING REGION, AND INTRODUCING A REDUCING GAS DIRECTLY INTO THE TREATING ZONE AT A REGION BETWEEN THE ROASTING AND DISTILLATION REGIONS TO REDUCE THE SULPHUR DIOXIDE FORMED BY ROASTING THE ORE AND TO UTILIZE THE HEAT OF REACTION IN THE REDUCTION OF THE SULPHUR DIOXIDE TO DISTILL OFF THE SULPHUR FORMED IN THE REDUCTION.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |