Patent US2967088A successfully refreshed from Google Patents.
US2967088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction techniques for the separation and purification of metals
Assignee: Individual
•
Filing: 1957-04-23
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Granted: 1961-01-03
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Expires: 1977-04-23
Abstract
No abstract record available.
Inventors
- 👤 Peters Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:32
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/32; C01; C01G; C01G1/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR SEPARATING MIXTURES OF METALS SELECTED FROM THE GROUP CONSISTING OF NICKEL, COBALT, ZIRCONIUM, HAFNIUM, MOLYDBENUM, TUNGSTEN AND THE RARE EARTH AND PLATINUM METALS WHICH COMPRISES CONVERTING THE METAL VALUES TO INSOLUBLE SALTS OF A POLYBASIC ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF OXALIC ACID, CITRIC ACID AND TARTARIC ACID AND FRACTIONALLY EXTRACTING SAID INSOLUBLE SALTS WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE ALUMINUM SALT, WHEREBY THE METAL VALUES APPEAR IN THE FRACTIONS IN THE ORDER OF THEIR ATOMIC NUMBER IN THE PERIODIC TABLE.
Claim 2
Dependent Claim
87 words
A PROCESS FOR SEPARATING MIXTURES OF METALS SELECTED FROM THE GROUP CONSISTING OF NICKEL, COBALT, ZIRCONIUM, HAFNIUM, MOLYDBENUM, TUNGSTEN AND THE RARE EARTH AND PLATINUM METALS WHICH COMPRISES CONVERTING THE METAL VALUES TO INSOLUBLE SALTS OF A POLYBASIC ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF OXALIC ACID, CITRIC ACID AND TARTARIC ACID AND FRACTIONALLY EXTRACTING SAID INSOLUBLE SALTS WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE ALUMINUM SALT, WHEREBY THE METAL VALUES APPEAR IN THE FRACTIONS IN THE ORDER OF THEIR ATOMIC NUMBER IN THE PERIODIC TABLE.
References Cited (Backward Citations)
US2741628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |