Patent US2951741A successfully refreshed from Google Patents.
US2951741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating complex ores
Assignee: Metallurgical Resources Inc
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Filing: 1955-08-05
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Granted: 1960-09-06
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Expires: 1975-08-05
Abstract
No abstract record available.
Inventors
- 👤 Harley A Sill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:02
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR SEPARATING ARSENIC AND SULFUR FROM COMPLEX ORE CONCENTRATES CONTAINING OTHER MINERALS, WHICH INCLUDES THE STEPS OF TREATING THE CONCENTRATE WITH AN AERATED BASIC SOLUTION UNDER AN ELEVATED PRESSURE AND AT A TEMPERATURE OF APPROXIMATELY 100 TO 200*C. TO CONVERT THE ARSENIC AND SULPHUR TO SOLUBLE ALKALI METAL SALTS, AND SEPARATING THE SOLUBLE SALTS FROM THE REMAINDER OF THE PRODUCTS OF THE REACTION.
Claim 2
Dependent Claim
65 words
A PROCESS FOR SEPARATING ARSENIC AND SULFUR FROM COMPLEX ORE CONCENTRATES CONTAINING OTHER MINERALS, WHICH INCLUDES THE STEPS OF TREATING THE CONCENTRATE WITH AN AERATED BASIC SOLUTION UNDER AN ELEVATED PRESSURE AND AT A TEMPERATURE OF APPROXIMATELY 100 TO 200*C. TO CONVERT THE ARSENIC AND SULPHUR TO SOLUBLE ALKALI METAL SALTS, AND SEPARATING THE SOLUBLE SALTS FROM THE REMAINDER OF THE PRODUCTS OF THE REACTION.
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) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |