US2923607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of separating zirconium values from hafnium values by solvent extraction with an alkyl phosphate
Assignee: Individual
•
Filing: 1952-06-25
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Granted: 1960-02-02
•
Expires: 1972-06-25
Abstract
No abstract record available.
Inventors
- 👤 Donald F Peppard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:29
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/003; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/38; C22B3/384; C22B3/3846; C22B3/387; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF TREATING A SUBSTANCE CONTAINING ZIRCONIUM AND HAFNIMU WHICH COMPRISES FORMING FROM SAID SUBSTANCE AN AQUEOUS AND ACID SOLUTION OF ZIRCONIUM AND HAFNIUM, PLACING SAID SOLUTION IN CONTACT WITH A SOLVENT CONSISTING AT LEAST CHIEFLY OF AN ALKYL PHOSPHATE, WHEREBY SAID SOLVENT EXTRACTS ZIRCONIUM FROM SAID AQUEOUS SOLUTION, WHEREAS HAFNIUM REMAINS THEREIN, AND REMOVING ZIRCONIUM AND HAFNIUM FROM SAID SOLVENT AND SAID SOLUTION RESPECTIVELY AFTER THEY HAVE BEEN THUS PLACED IN CONTACT WITH EACH OTHER.
Claim 2
Independent Claim
77 words
THE METHOD OF TREATING A SUBSTANCE CONTAINING ZIRCONIUM AND HAFNIMU WHICH COMPRISES FORMING FROM SAID SUBSTANCE AN AQUEOUS AND ACID SOLUTION OF ZIRCONIUM AND HAFNIUM, PLACING SAID SOLUTION IN CONTACT WITH A SOLVENT CONSISTING AT LEAST CHIEFLY OF AN ALKYL PHOSPHATE, WHEREBY SAID SOLVENT EXTRACTS ZIRCONIUM FROM SAID AQUEOUS SOLUTION, WHEREAS HAFNIUM REMAINS THEREIN, AND REMOVING ZIRCONIUM AND HAFNIUM FROM SAID SOLVENT AND SAID SOLUTION RESPECTIVELY AFTER THEY HAVE BEEN THUS PLACED IN CONTACT WITH EACH OTHER.
References Cited (Backward Citations)
US2578623A
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 |