US2852446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of zirconium tetrachlorides by fractional distillation
Assignee: EIDP Inc
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Filing: 1956-12-07
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Granted: 1958-09-16
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Expires: 1976-12-07
Abstract
No abstract record available.
Inventors
- 👤 Marvin L Bromberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:41
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR THE SEPARATION OF ZIRCONIUM TETRACHLORIDE FROM A MIXTURE COMPRISING TETRACHLORIDES OF ZIRCONIUM AND HAFNIUM WHICH COMPRISES SUBJECTING SAID MIXTURE IN THE FLUID STATE TO FRACTIONAL DISTALLATION UNDER PRESSURE EQUAL TO THE EQUILIBRIUM VAPOR PRESSURE IN A FRACTIONATING ZONE, REGULATING THE TEMPERATURE OF THE BOILING LIQUID IN THE HOT END OF THR FRACTIONING ZONE IN THE RANGE OF FROM 455*C. TO 520*C., AND REMOVING A ZIRCONIUM TETRACTHLORIDE PRODUCT LOW IN HAFINIUM FROM THE HOT END OF THE FRACTIONING ZONE AND A PRODUCT ENRICHED IN HAFNIUM TETRACHLORIDE FROM THE LOW TEMPERATURE END OF SAID ZONE.
Claim 2
Dependent Claim
96 words
A PROCESS FOR THE SEPARATION OF ZIRCONIUM TETRACHLORIDE FROM A MIXTURE COMPRISING TETRACHLORIDES OF ZIRCONIUM AND HAFNIUM WHICH COMPRISES SUBJECTING SAID MIXTURE IN THE FLUID STATE TO FRACTIONAL DISTALLATION UNDER PRESSURE EQUAL TO THE EQUILIBRIUM VAPOR PRESSURE IN A FRACTIONATING ZONE, REGULATING THE TEMPERATURE OF THE BOILING LIQUID IN THE HOT END OF THR FRACTIONING ZONE IN THE RANGE OF FROM 455*C. TO 520*C., AND REMOVING A ZIRCONIUM TETRACTHLORIDE PRODUCT LOW IN HAFINIUM FROM THE HOT END OF THE FRACTIONING ZONE AND A PRODUCT ENRICHED IN HAFNIUM TETRACHLORIDE FROM THE LOW TEMPERATURE END OF SAID ZONE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |