US2741553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a matte from arsenical sulfide cobalt ores
Assignee: QUEBEC METALLURG IND Ltd
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Filing: 1954-11-04
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Granted: 1956-04-10
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Expires: 1974-11-04
Abstract
No abstract record available.
Inventors
- 👤 Philip B Dettmer
- 👤 Lyall J Lichty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:13
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/02; C22B23/025; C22B5/00; C22B5/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
154 words
THE METHOD FOR PRODUCING A MATTE FROM A MATERIAL COMPRISING COBALT AND AN AMOUNT OF ARSENIC SUCH THAT IF THE MATERIAL IS MELTED WITHOUT PREVIOUS REMOVAL OF ARSENIC A SPEISS IS FORMED WHICH COMPRISES FORMING A FURNACE CHARGE IN WHICH THE RATIO OF ARSENIC TO SULFUR IS NOT SUBSTANTIALLY GREATER THAN 1 TO 1 AND WHICH COMPRISES SAID MATERIAL, FORMING A MOLTEN BATH COMPRISING A LAYER OF A COMPOUND COMPRISING COBALT AND SULFUR IN THE BOTTOM OF AN ELECTRIC FURNACE HEATED BY ELECTRIC ENERGY SUPPLIED BY SPACED ELECTRODES, FEEDING THE CHARGE INTO THE FURNACE ABOVE SAID BATH WHILE MAINTAINING AN OPEN MOLTEN POOL AROUND SAID ELECTRODES TO REMOVE THE MAJOR PORTION OF THE ARSENIC CONTENT FROM THE CHARGE BEFORE THE CHARGE MELTS, AND WITHDRAWING THE VAPORS EVOLVED FROM THE HEATED CHARGED AT A CONTROLLED RATE TO MAINTAIN AN ATMOSPHERE WITHIN THE FURNACE CONSISTING ESSENTIALLY OF SAID VAPORS UNDER A PRESSURE OF ABOUT ATMOSPHERIC PRESSURE.
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) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |