US3288594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of metals
Assignee: United Metallurgical Corp
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Filing: 1963-12-05
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Granted: 1966-11-29
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Expires: 1983-12-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:52
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/16; C22B9/22; C22B9/228; C22B59/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
128 words
A METHOD FOR THE MANUFACTURE OF A HIGHLY PURFIED METAL SELECTED FROM THE GROUP CONSISTING OF REFRACTORY METALS, LANTHANIDE RARE EARTH METALS, ACTINIDE RARE EARTH METALS AND ALLOYS THEREOF FROM A MIXTURE OF SAID METAL AND AN IMPURITY METAL WHICH FORMS A MIXTURE OF SAID METAL WHICH METHOD COMPRISES, MELTING SAID MIXTURE IN AN ELECTRON BEAM FURNACE AT A REDUCED PRESSURE OF NOT MORE THAN 1000 MICRONS OF MERCURY AND AT A TEMPERATURE SUFFICIENT TO PROVIDE A MOLTEN POOL OF SAID MIXTURE, CONTACTING SAID MOLTEN POOL WITH OXYGEN, REACTING SAID OXYGEN AND SAID IMPURITY METAL TO FORM AN IMPURITY METAL SUBOXIDE THAT IS CAPABLE OF BEING SUBSTANTIALLY VAPORIZED FROM SAID MOLTEN POOL WITHOUT VAPORIZING A SUBSTANTIAL AMOUNT OF SAID METAL, AND RECOVERING SAID METAL IN A PURIFIED FORM.
Claim 2
Independent Claim
128 words
A METHOD FOR THE MANUFACTURE OF A HIGHLY PURFIED METAL SELECTED FROM THE GROUP CONSISTING OF REFRACTORY METALS, LANTHANIDE RARE EARTH METALS, ACTINIDE RARE EARTH METALS AND ALLOYS THEREOF FROM A MIXTURE OF SAID METAL AND AN IMPURITY METAL WHICH FORMS A MIXTURE OF SAID METAL WHICH METHOD COMPRISES, MELTING SAID MIXTURE IN AN ELECTRON BEAM FURNACE AT A REDUCED PRESSURE OF NOT MORE THAN 1000 MICRONS OF MERCURY AND AT A TEMPERATURE SUFFICIENT TO PROVIDE A MOLTEN POOL OF SAID MIXTURE, CONTACTING SAID MOLTEN POOL WITH OXYGEN, REACTING SAID OXYGEN AND SAID IMPURITY METAL TO FORM AN IMPURITY METAL SUBOXIDE THAT IS CAPABLE OF BEING SUBSTANTIALLY VAPORIZED FROM SAID MOLTEN POOL WITHOUT VAPORIZING A SUBSTANTIAL AMOUNT OF SAID METAL, AND RECOVERING SAID METAL IN A PURIFIED FORM.
Claim 3
Independent Claim
35 words
A METHOD FOR THE MANUFACTURE OF A HIGHLY PURIFIED METAL SELECTED FROM THE GROUP CONSISTING OF REFRACTORY METALS, LANTHANIDE RARE EARTH METALS, ACTINIDE RARE EARTH METALS AND ALLOYS THEREOF FROM A MIXTURE OF SAID METAL
Claim 4
Independent Claim
35 words
A METHOD FOR THE MANUFACTURE OF A HIGHLY PURIFIED METAL SELECTED FROM THE GROUP CONSISTING OF REFRACTORY METALS, LANTHANIDE RARE EARTH METALS, ACTINIDE RARE EARTH METALS AND ALLOYS THEREOF FROM A MIXTURE OF SAID METAL
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |