US3077378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of europium from other lanthanide rare earths by solvent extraction
Assignee: Individual
•
Filing: 1961-07-14
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Granted: 1963-02-12
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Expires: 1981-07-14
Abstract
No abstract record available.
Inventors
- 👤 Donald F Peppard
- 👤 Earl P Horwitz
- 👤 George W Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:54
CPC Classifications
C; C22; C22B; C22B59/00; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0492; C01; C01F; C01F17/00; C01F17/10; C01F17/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS OF SEPARATING EUROPIUM VALUES FROM OTHER LANTHANIDE RARE EARTH METAL VALUES PRESENT TOGETHER IN AN AQUEOUS MINERAL-ACID-CONTAINING FEED SOLUTION, SAID MINERAL ACID BEING SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID AND SULFURIC ACID, COMPRISING ADDING A CHROMIUM (III) SALT AND ZINC AMALGAM TO SAID FEED SOLUTION; FLUSHING SAID AQUEOUS SOLUTION WITH NITROGEN; CONTACTING SAID SOLUTION WITH AN ORGANIC SOLUTION OF AN ACIDIC ESTER SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID ESTERS AND PHOSPHONIC ACID ESTERS AFTER IT HAS BEEN FLUSHED WITH NITROGEN; AND SEPARATING AN ORGANIC TRIVALENT-RAREEARTH-CONTAINING PHASE FROM AN AQUEOUS EUROPIUM-CONTAINING PHASE.
Claim 2
Dependent Claim
97 words
A PROCESS OF SEPARATING EUROPIUM VALUES FROM OTHER LANTHANIDE RARE EARTH METAL VALUES PRESENT TOGETHER IN AN AQUEOUS MINERAL-ACID-CONTAINING FEED SOLUTION, SAID MINERAL ACID BEING SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID AND SULFURIC ACID, COMPRISING ADDING A CHROMIUM (III) SALT AND ZINC AMALGAM TO SAID FEED SOLUTION; FLUSHING SAID AQUEOUS SOLUTION WITH NITROGEN; CONTACTING SAID SOLUTION WITH AN ORGANIC SOLUTION OF AN ACIDIC ESTER SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID ESTERS AND PHOSPHONIC ACID ESTERS AFTER IT HAS BEEN FLUSHED WITH NITROGEN; AND SEPARATING AN ORGANIC TRIVALENT-RAREEARTH-CONTAINING PHASE FROM AN AQUEOUS EUROPIUM-CONTAINING PHASE.
References Cited (Backward Citations)
US2859092A
Cited
US2955913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |