Patent US2797977A successfully refreshed from Google Patents.
US2797977A
Expired / Lapsed
US
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Leaching uranium from sulphidic materials
Assignee: Canadian Patents and Development Ltd
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Filing: 1954-10-13
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Granted: 1957-07-02
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Expires: 1974-10-13
Abstract
No abstract record available.
Inventors
- 👤 Frank A Forward
- 👤 Halpern Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:44
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0221; C22B60/0226; C22B60/0234
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF EXTRACTING URANIUM VALUES FROM URAMIUM BEARING STARTING MATERIAL WHICH COMPRISES THE STEPS OF FORMING A SLURRY OF FINELY DIVIDED ISTING OF MINING MATERIAL, AT LEAST ONE OF THE GROUP CONSISTING OF MINERAL SULPHIDES AND ELEMENTAL SULPHUR, AND AN AQUEOUS SOLUTION, HEATING THE PULP MIXTURE TO A TEMPERATURE ABOVE ABOUT 80*C. IN A REACTION VESSEL, FEEDING AN OXYGEN BEARING, OXIDIZING GAS INTO THE REACTION VESSEL IN AMOUNT SUFFICIENT TO MAINTAIN A POSITIVE PARTIAL PRESSURE OF OXYGEN ABOVE THE PRESSURE AUTOGENOUSLY GENERATED BY THE TEMPERATURE AT WHICH THE REACTION IS CONDUCTED, CONTINUING THE OXIDATION REACTION TO DISSOLVE URANIUM VALUES IN THE LEACH SOLUTION, AND SEPARATING LEACH SOLUTION CONTAINING DISSLOVED URANIUM VALUES FROM THE UNDISSOLVED RESIDUE.
Claim 2
Independent Claim
116 words
THE METHOD OF EXTRACTING URANIUM VALUES FROM URAMIUM BEARING STARTING MATERIAL WHICH COMPRISES THE STEPS OF FORMING A SLURRY OF FINELY DIVIDED ISTING OF MINING MATERIAL, AT LEAST ONE OF THE GROUP CONSISTING OF MINERAL SULPHIDES AND ELEMENTAL SULPHUR, AND AN AQUEOUS SOLUTION, HEATING THE PULP MIXTURE TO A TEMPERATURE ABOVE ABOUT 80*C. IN A REACTION VESSEL, FEEDING AN OXYGEN BEARING, OXIDIZING GAS INTO THE REACTION VESSEL IN AMOUNT SUFFICIENT TO MAINTAIN A POSITIVE PARTIAL PRESSURE OF OXYGEN ABOVE THE PRESSURE AUTOGENOUSLY GENERATED BY THE TEMPERATURE AT WHICH THE REACTION IS CONDUCTED, CONTINUING THE OXIDATION REACTION TO DISSOLVE URANIUM VALUES IN THE LEACH SOLUTION, AND SEPARATING LEACH SOLUTION CONTAINING DISSLOVED URANIUM VALUES FROM THE UNDISSOLVED RESIDUE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |