US2513339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of purifying aluminum by distillation of mixtures thereof with other metals
Assignee: INDEPENDENT ALUMINUM Corp
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Filing: 1946-09-25
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Granted: 1950-07-04
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Expires: 1966-09-25
Abstract
No abstract record available.
Inventors
- 👤 Loevenstein Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:14
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/16; C22B21/00; C22B21/0084; C22B21/0092; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE PROCESS OF SEPARATING ALUMINUM FROM ITS ALLOYS WITH HIGHER BOILING POINT METALS HAVING A RELATIVELY LESSENED TENDENCY AS COMPARED TO ALUMINUM TO VAPORIZE ON HEATING AT REDUCED PRESSURES SUCH AS IRON, SILICON AND TITANIUM, WHICH COMPRISES HEATING THE ALLOY UNDER REDUCED PRESSURE IN THE PRESENCE OF VAPORS OF A RELATIVELY VOLATILE METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, CADMIUM AND MERCURY AND WHILE MAINTAINING THE ALLOY IN AT LEAST A PARTLY LIQUID STATE AND BELOW THE BOILING POINT OF ALUMINUM AT THE PRESSURE IMPOSED, WITHDRAWING THE RESULTING VAPOR MIXTURE OF ALUMINUM AND SAID SELECTED METAL FROM THE HEATING ZONE, AND THEREAFTER CONDENSING THE ALUMINUM VAPORS AND SEPARATING THE CONDENSED ALUMINUM FROM SAID RELATIVELY VOLATILE METAL.
Claim 2
Dependent Claim
120 words
THE PROCESS OF SEPARATING ALUMINUM FROM ITS ALLOYS WITH HIGHER BOILING POINT METALS HAVING A RELATIVELY LESSENED TENDENCY AS COMPARED TO ALUMINUM TO VAPORIZE ON HEATING AT REDUCED PRESSURES SUCH AS IRON, SILICON AND TITANIUM, WHICH COMPRISES HEATING THE ALLOY UNDER REDUCED PRESSURE IN THE PRESENCE OF VAPORS OF A RELATIVELY VOLATILE METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, CADMIUM AND MERCURY AND WHILE MAINTAINING THE ALLOY IN AT LEAST A PARTLY LIQUID STATE AND BELOW THE BOILING POINT OF ALUMINUM AT THE PRESSURE IMPOSED, WITHDRAWING THE RESULTING VAPOR MIXTURE OF ALUMINUM AND SAID SELECTED METAL FROM THE HEATING ZONE, AND THEREAFTER CONDENSING THE ALUMINUM VAPORS AND SEPARATING THE CONDENSED ALUMINUM FROM SAID RELATIVELY VOLATILE METAL.
References Cited (Backward Citations)
US1931144A
Cited
US1872611A
Cited
US1961135A
Cited
US1964593A
Cited
US2262164A
Cited
GB543468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |