US2619407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur recovery
Assignee: Guaranty Investment Corp Ltd
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Filing: 1946-12-09
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Granted: 1952-11-25
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Expires: 1966-12-09
Abstract
No abstract record available.
Inventors
- 👤 Marvin J Udy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:42
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/06; C22; C22B; C22B1/00; C22B1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF RECOVERING SULPHUR FROM IRON SULPHIDE-BEARING MATERIAL WHICH COMPRISES SUBJECTING THE IRON SULPHIDE-BEARING MATERIAL TO AN OXIDIZING TREATMENT AND FORMING (1) SULPHUR DIOXIDE IN AMOUNT EQUIVALENT TO ABOUT ONE-THIRD OF THE SULPHUR CONTAINED IN THE IRON SULPHIDEBEARING MATERIAL AND (2) A MATTE PRODUCT CONTAINING ABOUT TWO-THIRDS OF THE SULPHUR OF THE IRON SULPHIDE-BEARING MATERIAL, TREATING THE MATTE PRODUCT IN SOLID, FINELY DIVIDED FORM WITH ACID AND PRODUCING HYDROGEN SULPHIDE, AND REACTING THE SULPHUR DIOXIDE AND THE HYDROGEN SULPHIDE TO PRODUCE ELEMENTAL SULPHUR.
Claim 2
Independent Claim
84 words
THE METHOD OF RECOVERING SULPHUR FROM IRON SULPHIDE-BEARING MATERIAL WHICH COMPRISES SUBJECTING THE IRON SULPHIDE-BEARING MATERIAL TO AN OXIDIZING TREATMENT AND FORMING (1) SULPHUR DIOXIDE IN AMOUNT EQUIVALENT TO ABOUT ONE-THIRD OF THE SULPHUR CONTAINED IN THE IRON SULPHIDEBEARING MATERIAL AND (2) A MATTE PRODUCT CONTAINING ABOUT TWO-THIRDS OF THE SULPHUR OF THE IRON SULPHIDE-BEARING MATERIAL, TREATING THE MATTE PRODUCT IN SOLID, FINELY DIVIDED FORM WITH ACID AND PRODUCING HYDROGEN SULPHIDE, AND REACTING THE SULPHUR DIOXIDE AND THE HYDROGEN SULPHIDE TO PRODUCE ELEMENTAL SULPHUR.
References Cited (Backward Citations)
US1892999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |