US2985507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying metal halides
Assignee: Union Carbide Corp
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Filing: 1957-12-23
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Granted: 1961-05-23
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Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 Fritz O Wienert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:47
CPC Classifications
C; C01; C01G; C01G1/00; C01G1/06; C22; C22B; C22B1/00; C22B1/02; C22B1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A PROCESS FOR THE PURIFICATION OF CONTAMINATED VAPORS OF A VOLATILE HALIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, VANADIUM, CHROMIUM, ZIRCONIUM, COLUMBIUM, MOLYBDENUM, HAFNIUM, TANTALUM, AND TUNGSTEN WHEREIN THE CONTAMINANT COMPRISES ENTRAINED SOLID OXIDE PARTICLES OF SAID SELECTED METAL, WHICH PROCESS COMPRISES TREATING SAID CONTAMINATED VAPORS WITH A GASEOUS FREE HALOGEN OF THE SAID VOLATILE HALIDE AND PASSING SAID VOLATILE HALIDE AND SAID FREE HALOGEN THROUGH A FILTER BED CONSISTING ESSENTIALLY OF A SOLID CARBONACEOUS REDUCING MATERIAL UNDER OPERATING CONDITIONS WHEREBY AT LEAST A SUBSTANTIAL PORTION OF SAID ENTRAINED SOLID OXIDE PARTICLES ARE TRAPPED IN SAID FILTER BED, AND MAINTAINING SAID FILTER BED AT A TEMPERATURE SUFFICIENT TO EFFECT CHEMICAL REACTION BETWEEN THE SAID ENTRAINED SOLID OXIDE PARTICLES, AND SAID CARBONACEOUS FILTER BED, AND SAID FREE HALOGENS, WHEREBY SAID ENTRAINED OXIDE IS CONVERTED TO A GASEOUS HALIDE OF
Claim 2
Dependent Claim
142 words
A PROCESS FOR THE PURIFICATION OF CONTAMINATED VAPORS OF A VOLATILE HALIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, VANADIUM, CHROMIUM, ZIRCONIUM, COLUMBIUM, MOLYBDENUM, HAFNIUM, TANTALUM, AND TUNGSTEN WHEREIN THE CONTAMINANT COMPRISES ENTRAINED SOLID OXIDE PARTICLES OF SAID SELECTED METAL, WHICH PROCESS COMPRISES TREATING SAID CONTAMINATED VAPORS WITH A GASEOUS FREE HALOGEN OF THE SAID VOLATILE HALIDE AND PASSING SAID VOLATILE HALIDE AND SAID FREE HALOGEN THROUGH A FILTER BED CONSISTING ESSENTIALLY OF A SOLID CARBONACEOUS REDUCING MATERIAL UNDER OPERATING CONDITIONS WHEREBY AT LEAST A SUBSTANTIAL PORTION OF SAID ENTRAINED SOLID OXIDE PARTICLES ARE TRAPPED IN SAID FILTER BED, AND MAINTAINING SAID FILTER BED AT A TEMPERATURE SUFFICIENT TO EFFECT CHEMICAL REACTION BETWEEN THE SAID ENTRAINED SOLID OXIDE PARTICLES, AND SAID CARBONACEOUS FILTER BED, AND SAID FREE HALOGENS, WHEREBY SAID ENTRAINED OXIDE IS CONVERTED TO A GASEOUS HALIDE OF
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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |