US2985569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic method and means for production of refractory metal
Assignee: NL Industries Inc
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Filing: 1956-07-30
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Granted: 1961-05-23
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Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 Leonard W Gendvil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:38
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD FOR PRODUCING ZIRCONIUM METAL IN AN ELECTROLYTIC CELL HAVING AN ANODE, BELL-TYPE CATHODE HAVING A PERFORATED BOTTOM, AND A FUSED SALT BATH CONSISTING ESSENTIALLY OF SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HALIDES, ALKALINE EARTH METAL HALIDES, MAGNESIUM HALIDES AND MIXTURES THEREOF COMPRISING THE STEPS OF: INTRODUCING ZRCL4 BELOW THE SURFACE OF SAID BATH INTO THE INTERIOR OF SAID BELL-TYPE CATHODE, PASSING ELECTRIC CURRENT BETWEEN THE ANODE AND SAID BELL-TYPE CATHODE AT A RATE SYNCHRONIZED WITH THE ZRCL4 ADDITION SO THAT THE AMOUNT OF CURRENT IS SUFFICIENT TO REDUCE THE ZRCL4 BEING ADDED TO METAL AND DEPOSITING AN ADHERENT MASS OF ZIRCONIUM METAL IN THE INTERIOR OF THE BELL-TYPE CATHODE, WHILE MAINTAINING THE ELECTROLYTE EXTERIORLY OF THE CATHODE SUBSTANTIALLY FREE OF REDUCED ZIRCONIUM VALUES.
Claim 2
Independent Claim
128 words
A METHOD FOR PRODUCING ZIRCONIUM METAL IN AN ELECTROLYTIC CELL HAVING AN ANODE, BELL-TYPE CATHODE HAVING A PERFORATED BOTTOM, AND A FUSED SALT BATH CONSISTING ESSENTIALLY OF SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HALIDES, ALKALINE EARTH METAL HALIDES, MAGNESIUM HALIDES AND MIXTURES THEREOF COMPRISING THE STEPS OF: INTRODUCING ZRCL4 BELOW THE SURFACE OF SAID BATH INTO THE INTERIOR OF SAID BELL-TYPE CATHODE, PASSING ELECTRIC CURRENT BETWEEN THE ANODE AND SAID BELL-TYPE CATHODE AT A RATE SYNCHRONIZED WITH THE ZRCL4 ADDITION SO THAT THE AMOUNT OF CURRENT IS SUFFICIENT TO REDUCE THE ZRCL4 BEING ADDED TO METAL AND DEPOSITING AN ADHERENT MASS OF ZIRCONIUM METAL IN THE INTERIOR OF THE BELL-TYPE CATHODE, WHILE MAINTAINING THE ELECTROLYTE EXTERIORLY OF THE CATHODE SUBSTANTIALLY FREE OF REDUCED ZIRCONIUM VALUES.
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 |