Patent US2953433A successfully refreshed from Google Patents.
US2953433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of zirconium tetrahalide
Assignee: RMI Co
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Filing: 1957-02-12
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Granted: 1960-09-20
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Expires: 1977-02-12
Abstract
No abstract record available.
Inventors
- 👤 Newnham Ivan Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:41
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS FOR THE SEPARATION OF ZIRCONIUM TETRAHALIDE FROM METAL HALIDE IMPURITIES, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON, ALUMINUM, SILICON, VANADIUM, AND MIXTURES THEREOF, WHICH COMPRISES REDUCING THE ZIRCONIUM TETRAHALIDE TO ZIRCONIUM TRIHALIDE WITH ZIRCONIUM DIHALIDE AT A TEMPERATURE OF ABOUT 300* TO 450*C., SEPARATING UNREDUCED METAL HALIDE IMPURITIESL FROM THE ZIRCONIUM TRIHALIDE AND FROM METAL HALIDE IMPURITIES WHICH ARE REDUCED TO LOWER HALIDE FORMS BY REACTION WITH ZIRCONIUM DIHALIDE, HEATING SAID ZIRCONIUM TRIHALIDE AND SAID REDUCED METAL IMPURITIES AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 300* TO 600*C. TO SELECTIVELY DISPROPORTIONATE THE ZIRCONIUM TRIHALIDE, FROM THE SEPARATING THE RESULTING ZIRCONIUM TETRAHALIDE FROM THE ZIRCONIUM DICHLORIDE AND REDUCED METAL HALIDE IMPURITIES WHEREIN SAID ZIRCONIUM AND METAL HALIDES ARE SELECTED FROM THE GROUP CONSISTING OF CHLORIDES, IODIDES AND BROMIDES.
Claim 2
Dependent Claim
133 words
A PROCESS FOR THE SEPARATION OF ZIRCONIUM TETRAHALIDE FROM METAL HALIDE IMPURITIES, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON, ALUMINUM, SILICON, VANADIUM, AND MIXTURES THEREOF, WHICH COMPRISES REDUCING THE ZIRCONIUM TETRAHALIDE TO ZIRCONIUM TRIHALIDE WITH ZIRCONIUM DIHALIDE AT A TEMPERATURE OF ABOUT 300* TO 450*C., SEPARATING UNREDUCED METAL HALIDE IMPURITIESL FROM THE ZIRCONIUM TRIHALIDE AND FROM METAL HALIDE IMPURITIES WHICH ARE REDUCED TO LOWER HALIDE FORMS BY REACTION WITH ZIRCONIUM DIHALIDE, HEATING SAID ZIRCONIUM TRIHALIDE AND SAID REDUCED METAL IMPURITIES AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 300* TO 600*C. TO SELECTIVELY DISPROPORTIONATE THE ZIRCONIUM TRIHALIDE, FROM THE SEPARATING THE RESULTING ZIRCONIUM TETRAHALIDE FROM THE ZIRCONIUM DICHLORIDE AND REDUCED METAL HALIDE IMPURITIES WHEREIN SAID ZIRCONIUM AND METAL HALIDES ARE SELECTED FROM THE GROUP CONSISTING OF CHLORIDES, IODIDES AND BROMIDES.
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |