Patent US3801694A successfully refreshed from Google Patents.
US3801694A
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US
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Static leaching process
Assignee: Consolidation Coal Co
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Filing: 1971-11-15
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Granted: 1974-04-02
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Expires: 1991-11-15
Abstract
Abstract THE PRESENT INVENTION RELATES TO A METHOD FOR LEACHING A MINERAL FROM AN ORE CONTAINING SAID MINERAL WHEREIN AN ACID LIXIVIANT CONTAINING A SOLUBLE ALUMINUM SALT IS INTRODUCED UNDER PRESSURE INTO A VESSEL CONTAINING A BED OF ORE. A SWEEP FLUID IS THEN INTRODUCED INTO SAID VESSEL TO SWEEP THE LIXIVIANT CONTAINING THE DISSOLVED MINERAL VALUES OUT OF SAID ORE BED. AN ADDITIONAL ASPECT OF THIS INVENTION IS A STEP OF DRYING SAID ORE IN AN AGITATED STATE PRIOR TO LEACHING.
Inventors
- 👤 G Pace
- 👤 E Shortridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:52
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/04; C22B3/06; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0221; C22B60/0226; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |