Patent US2805938A successfully refreshed from Google Patents.
US2805938A
Expired / Lapsed
US
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Separation of metal sulfides
Assignee: Individual
•
Filing: 1955-01-07
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Granted: 1957-09-10
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Expires: 1975-01-07
Abstract
No abstract record available.
Inventors
- 👤 Patrick J Mcgauley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:54
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/04; C22B3/06; C22B3/08; C22B1/00; C22B1/02; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A HYDROMETALLURIGICAL PROCESS FOR SEPARATING IRON VALUES AND SULFUR VALUES FROM MATERIALS CONTAINING THE SAME, THE STEPS WHICH COMPRISE: ROASTING AN IRON-CONTAINING SULFIDE MINERAL IN A NON-OXIDIZING ATMOSPHERE; LEACHING RESULTANT CALCINE WITH AN AQUEOUS SULFURIC ACID LEACHING LIQUOR; TREATING LIQUOR FROM SAID LEACHING STEP TO THE ACTION OF OXYGEN AND COPPER SULFIDE AT AN ELEVATED TEMPERATURE UNDER SUPER ATMOSPHERIC PRESSURE, WHEREBY THE IRON AND SULFUR VALUES ARE CONVERTED TO INSOLUBLE SOLIDS AND SUBSTANTIALLY ALL THE COPPER IS DISSOLVED INTO SOLUTION; SEPARATING SAID INSOLUBLE IRON VALUES AND SULFUR VALUES FROM SAID SOLUTION; TREATING SAID SOLUTION WITH A SULFIDE
Claim 2
Dependent Claim
98 words
IN A HYDROMETALLURIGICAL PROCESS FOR SEPARATING IRON VALUES AND SULFUR VALUES FROM MATERIALS CONTAINING THE SAME, THE STEPS WHICH COMPRISE: ROASTING AN IRON-CONTAINING SULFIDE MINERAL IN A NON-OXIDIZING ATMOSPHERE; LEACHING RESULTANT CALCINE WITH AN AQUEOUS SULFURIC ACID LEACHING LIQUOR; TREATING LIQUOR FROM SAID LEACHING STEP TO THE ACTION OF OXYGEN AND COPPER SULFIDE AT AN ELEVATED TEMPERATURE UNDER SUPER ATMOSPHERIC PRESSURE, WHEREBY THE IRON AND SULFUR VALUES ARE CONVERTED TO INSOLUBLE SOLIDS AND SUBSTANTIALLY ALL THE COPPER IS DISSOLVED INTO SOLUTION; SEPARATING SAID INSOLUBLE IRON VALUES AND SULFUR VALUES FROM SAID SOLUTION; TREATING SAID SOLUTION WITH A SULFIDE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |