US2741628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of hafnium and zirconium salts
Assignee: Individual
•
Filing: 1951-09-14
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Granted: 1956-04-10
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Expires: 1971-09-14
Abstract
No abstract record available.
Inventors
- 👤 William K Plucknett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:17
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/003; C01G27/00; C01G27/003; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/32; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS OF SEPARATING ZIRCONIUM SALT FROM HAFNIUM SALT CONTAINED IN MIXTURE IN AN AQUEOUS SOLUTION, SAID SALTS BEING SELECTED FROM THE GROUP CONSISTING OF OXYCHLORIDES AND OXYNITRATES, COMPRISING CONTACTING SAID SOLUTION WITH A, SALICYLIC ACID DISSOLVED IN A SUBSTANTIALLY WATER-IMMISCIBLE OXYGEN-CONTAINING INERT ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS AND NITROBENZENE IN WHICH SAID SALTS ARE INSOLUBLE WHEREBY SAID ZIRCONIUM SALT IS COMPLEXED BY SAID SALICYLIC ACID AND THE ZIRCONIUM COMPLEX FORMED IS PREFERENTIALLY TAKEN UP BY AN ORGANIC PHASE, AND SEPARATING SAID ORGANIC PHASE FROM SAID AQUEOUS SOLUTION.
Claim 2
Dependent Claim
92 words
A PROCESS OF SEPARATING ZIRCONIUM SALT FROM HAFNIUM SALT CONTAINED IN MIXTURE IN AN AQUEOUS SOLUTION, SAID SALTS BEING SELECTED FROM THE GROUP CONSISTING OF OXYCHLORIDES AND OXYNITRATES, COMPRISING CONTACTING SAID SOLUTION WITH A, SALICYLIC ACID DISSOLVED IN A SUBSTANTIALLY WATER-IMMISCIBLE OXYGEN-CONTAINING INERT ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS AND NITROBENZENE IN WHICH SAID SALTS ARE INSOLUBLE WHEREBY SAID ZIRCONIUM SALT IS COMPLEXED BY SAID SALICYLIC ACID AND THE ZIRCONIUM COMPLEX FORMED IS PREFERENTIALLY TAKEN UP BY AN ORGANIC PHASE, AND SEPARATING SAID ORGANIC PHASE FROM SAID AQUEOUS SOLUTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |