Patent US3137568A successfully refreshed from Google Patents.
US3137568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of zirconium and hafnium tetrachlorides with liquid magnesium
Assignee: Evonik Operations GmbH
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Filing: 1961-05-31
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Granted: 1964-06-16
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Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 Renner Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:26
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR THE PRODUCTION OF ZIRCONIUM METAL WHICH COMPRISES PLACING SOLID MAGNESIUM COVERED BY AN ALKALI METAL HALIDE IN A REACTION VESSEL, CONTACTING ZRCL4 VAPORS WITH SAID ALKALI METAL HALIDE AT A SUFFICIENTLY RAISED TEMPERATURE BELOW THE MELTING POINT OF THE MAGNESIUM THAT ZRCL4 IS DISSOLVED BY SAID ALKALI METAL HALIDE TO FORM A FUSED ALKALI METAL HALIDE SOLUTION OF SAID ZRCL4 OVER SAID MAGNESIUM METAL WHILE SAID MAGNESIUM METAL IS SOLID, RAISING THE TEMPERATURE OF THE REACTION VESSEL TO FUSE THE MAGNESIUM IN CONTACT WITH THE SUPERNATANT FUSED ALKALI METAL HALIDE SOLUTION WHEREBY THE ZRCL4 CONTAINED IN SUCH SOLUTION IS REDUCED TO ZR SPONGE AT THE INTERFACE BETWEEN THE LIQUID MAGNESIUM AND SUCH SUPERATANT SOLUTION.
Claim 2
Dependent Claim
117 words
A PROCESS FOR THE PRODUCTION OF ZIRCONIUM METAL WHICH COMPRISES PLACING SOLID MAGNESIUM COVERED BY AN ALKALI METAL HALIDE IN A REACTION VESSEL, CONTACTING ZRCL4 VAPORS WITH SAID ALKALI METAL HALIDE AT A SUFFICIENTLY RAISED TEMPERATURE BELOW THE MELTING POINT OF THE MAGNESIUM THAT ZRCL4 IS DISSOLVED BY SAID ALKALI METAL HALIDE TO FORM A FUSED ALKALI METAL HALIDE SOLUTION OF SAID ZRCL4 OVER SAID MAGNESIUM METAL WHILE SAID MAGNESIUM METAL IS SOLID, RAISING THE TEMPERATURE OF THE REACTION VESSEL TO FUSE THE MAGNESIUM IN CONTACT WITH THE SUPERNATANT FUSED ALKALI METAL HALIDE SOLUTION WHEREBY THE ZRCL4 CONTAINED IN SUCH SOLUTION IS REDUCED TO ZR SPONGE AT THE INTERFACE BETWEEN THE LIQUID MAGNESIUM AND SUCH SUPERATANT 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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |