US2740707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of extracting metal values from metal bearing material
Assignee: Viridian Inc Canada
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Filing: 1954-04-12
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Granted: 1956-04-03
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Expires: 1974-04-12
Abstract
No abstract record available.
Inventors
- 👤 Herrmann Walter Andrew Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:25
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
THE METHOD OF EXTRACTING SELECTED METAL VALUES FROM METAL BEARING MATERIAL AND DISSOLVING THEM IN A LEACH LIQUOR WHICH COMPRISES CONTINUOUSLY FEEDING A SLURRY OF FINELY DIVIDED SOLID METAL BEARING PARTICLES AND A LEACH LIQUOR FOR SELECTED METAL VALUES CONTAINED THEREIN AND A STREAM OF GAS UNDER PRESSURE INTO THE LOWER PART OF A VERTICALLY DISPOSED REACTION COLUMN, SAID COLUMN BEING MAINTAINED AT A TEMPERATURE AND PRESSURE ABOVE ATMOSPHERIC TEMPERATURE; FORMING IN THE REACTION COLUMN A CONTINUOUSLY RISING TURBULENT SUSPENSION OF GAS BUBBLES, SOLID METAL BEARING PARTICLES AND LEACH LIQUOR OF SUBSTANTIALLY UNIFORM CROSS SECTION AND OF SUBSTANTIALLY UNIFORM VELOCITY WITHOUT FALL BACK OF SOLID PARTICLES FROM THE POINT OF ENTRY OF THE METAL BEARING PARTICLES TO THE POINT OF DISCHARGE OF THE SLURRY; INTERREGULATING THE DISTRIBUTION OF METAL BEARING PARTICLES IN THE REACTION COLUMN, THE RATE OF DISCHARGE OF UNDISSOLVED SOLID PARTICLES AND LEACH LIQUOR AND GAS FROM THE UPPER PART OF THE REACTION COLUMN AND THE EXTRACTION OF METAL VALUES TO OBTAIN OP-
Claim 2
Independent Claim
165 words
THE METHOD OF EXTRACTING SELECTED METAL VALUES FROM METAL BEARING MATERIAL AND DISSOLVING THEM IN A LEACH LIQUOR WHICH COMPRISES CONTINUOUSLY FEEDING A SLURRY OF FINELY DIVIDED SOLID METAL BEARING PARTICLES AND A LEACH LIQUOR FOR SELECTED METAL VALUES CONTAINED THEREIN AND A STREAM OF GAS UNDER PRESSURE INTO THE LOWER PART OF A VERTICALLY DISPOSED REACTION COLUMN, SAID COLUMN BEING MAINTAINED AT A TEMPERATURE AND PRESSURE ABOVE ATMOSPHERIC TEMPERATURE; FORMING IN THE REACTION COLUMN A CONTINUOUSLY RISING TURBULENT SUSPENSION OF GAS BUBBLES, SOLID METAL BEARING PARTICLES AND LEACH LIQUOR OF SUBSTANTIALLY UNIFORM CROSS SECTION AND OF SUBSTANTIALLY UNIFORM VELOCITY WITHOUT FALL BACK OF SOLID PARTICLES FROM THE POINT OF ENTRY OF THE METAL BEARING PARTICLES TO THE POINT OF DISCHARGE OF THE SLURRY; INTERREGULATING THE DISTRIBUTION OF METAL BEARING PARTICLES IN THE REACTION COLUMN, THE RATE OF DISCHARGE OF UNDISSOLVED SOLID PARTICLES AND LEACH LIQUOR AND GAS FROM THE UPPER PART OF THE REACTION COLUMN AND THE EXTRACTION OF METAL VALUES TO OBTAIN OP-
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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) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |