US2923618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of copper leach solutions
Assignee: Fluor Corp
•
Filing: 1958-09-08
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Granted: 1960-02-02
•
Expires: 1978-09-08
Abstract
No abstract record available.
Inventors
- 👤 Redemann C Ernst
- 👤 Henry J Tschirner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:31
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; C22B15/0084; C22B15/0089; C22B13/00; C22B13/04; C22B25/00; C22B25/04; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE PROCESS OF RECOVERING LEAD AND TIN FROM RICH ALKALINE LEACH LIQUOR SOLUTIONS CONTAINING COPPER, AMMONIA, CARBON DIOXIDE, LEAD AND TIN, THAT INCLUDES ADDING TO SAID SOLUTION A WATER SOLUBLE SULFATE, ADDING TO THE SULFATE AND STILL ALKALINE SOLUTION A PRECIPITATING COMPOUND OF THE GROUP CONSISTING OF WATER SOLUBLE SALTS OF STRONTIUM, BARIUM AND CALCIUM AND HYDROXIDES OF STRONTIUM, BARRIUM AND CALCIUM, AND THEREBY SIMULTANEOUSLY PRECIPITATING SEPARABLE TIN AND LEAD COMPOUNDS FROM THE SOLUTION.
Claim 2
Dependent Claim
74 words
THE PROCESS OF RECOVERING LEAD AND TIN FROM RICH ALKALINE LEACH LIQUOR SOLUTIONS CONTAINING COPPER, AMMONIA, CARBON DIOXIDE, LEAD AND TIN, THAT INCLUDES ADDING TO SAID SOLUTION A WATER SOLUBLE SULFATE, ADDING TO THE SULFATE AND STILL ALKALINE SOLUTION A PRECIPITATING COMPOUND OF THE GROUP CONSISTING OF WATER SOLUBLE SALTS OF STRONTIUM, BARIUM AND CALCIUM AND HYDROXIDES OF STRONTIUM, BARRIUM AND CALCIUM, AND THEREBY SIMULTANEOUSLY PRECIPITATING SEPARABLE TIN AND LEAD COMPOUNDS FROM THE SOLUTION.
References Cited (Backward Citations)
US1484088A
Cited
US2695226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |