US2943101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation and purification of metals
Assignee: Individual
•
Filing: 1957-04-23
•
Granted: 1960-06-28
•
Expires: 1977-04-23
Abstract
No abstract record available.
Inventors
- 👤 Peters Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:08
CPC Classifications
C; C22; C22B; C22B59/00; Y; Y10; Y10S; Y10S424/00; Y10S424/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A PROCESS FOR SEPARATING A MIXTURE OF VALUES OF AT LEAST TWO METALS SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUPS IIIB, IVB, AND VB OF THE PERIODIC TABLE INTO ITS COMPONENTS BY THE FRACTIONAL PRECIPITATION OF SAID METAL VALUES FROM AN AQUEOUS SOLUTION, THE IMPROVEMENT WHICH COMPRISES FRACTIONALLY PRECIPITATING THE METAL VALUES FROM AN AQUEOUS SOLUTION PREPARED BY INTIMATELY CONTACTING THE MIXTURE OF METAL VALUES WITH A SOURCE OF ALUMINUM CATIONS, AND WITH A SOURCE OF RADICALS OF AT LEAST ONE POLYBASIC ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF OXALIC ACID, CITRIC ACID AND TARTARIC ACID, WHEREBY THE METAL VALUES ARE DISSOLVED IN SAID SOLUTION AS COMPLEX IONS HAVING A GREATER DEGREE OF CHEMICAL DISSIMILARITY THAN THE CATIONS OF SAID METAL VALUES THEREBY PERMITTING MORE EFFECTIVE SEPARATION OF THE METAL VALUES.
Claim 2
Dependent Claim
135 words
IN A PROCESS FOR SEPARATING A MIXTURE OF VALUES OF AT LEAST TWO METALS SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUPS IIIB, IVB, AND VB OF THE PERIODIC TABLE INTO ITS COMPONENTS BY THE FRACTIONAL PRECIPITATION OF SAID METAL VALUES FROM AN AQUEOUS SOLUTION, THE IMPROVEMENT WHICH COMPRISES FRACTIONALLY PRECIPITATING THE METAL VALUES FROM AN AQUEOUS SOLUTION PREPARED BY INTIMATELY CONTACTING THE MIXTURE OF METAL VALUES WITH A SOURCE OF ALUMINUM CATIONS, AND WITH A SOURCE OF RADICALS OF AT LEAST ONE POLYBASIC ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF OXALIC ACID, CITRIC ACID AND TARTARIC ACID, WHEREBY THE METAL VALUES ARE DISSOLVED IN SAID SOLUTION AS COMPLEX IONS HAVING A GREATER DEGREE OF CHEMICAL DISSIMILARITY THAN THE CATIONS OF SAID METAL VALUES THEREBY PERMITTING MORE EFFECTIVE SEPARATION OF THE METAL VALUES.
References Cited (Backward Citations)
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Cited
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Cited
US2780518A
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US2767044A
Cited
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US2819945A
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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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |