US3155494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of fine aluminum from aluminum dross
Assignee: Chemical Products Corp
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Filing: 1962-05-08
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Granted: 1964-11-03
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Expires: 1982-05-08
Abstract
No abstract record available.
Inventors
- 👤 Sidney M Heins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:37
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0084; C22B21/0092; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S75/00; Y10S75/959
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OR RECOVERING METALLIC ALUMINUM FROM ALUMINUM DROSS WHICH CONSISTS IN PREPARING A MIXTURE OF FOUR PARTS BY WEIGHT OF CRUSHED ALUMINUM DROSS AND ABOUT ONE PART BY WEIGHT OF AN ALKALI NITRATE SELECTED FROM THE GROUP CONSISTING OF SODIUM NITRATE AND POTASSIUM NITRATE, HEATING THE MIXTURE UNTIL THE NITRATE BECOMES FUSED, ADDING CRUSHED CHARCOAL TO THE HEATED MIXTURE AT A RATE TO PRODUCE HEAT BY THE EXOTHERMIC REACTION OF THE CHARCOAL AND THE FUSED NITRATE SUFFICIENT TO MELT THE ALUMINUM, AND THEN COALESCING THE MELTED ALUMINUM BY AGITATION.
Claim 2
Independent Claim
90 words
THE METHOD OR RECOVERING METALLIC ALUMINUM FROM ALUMINUM DROSS WHICH CONSISTS IN PREPARING A MIXTURE OF FOUR PARTS BY WEIGHT OF CRUSHED ALUMINUM DROSS AND ABOUT ONE PART BY WEIGHT OF AN ALKALI NITRATE SELECTED FROM THE GROUP CONSISTING OF SODIUM NITRATE AND POTASSIUM NITRATE, HEATING THE MIXTURE UNTIL THE NITRATE BECOMES FUSED, ADDING CRUSHED CHARCOAL TO THE HEATED MIXTURE AT A RATE TO PRODUCE HEAT BY THE EXOTHERMIC REACTION OF THE CHARCOAL AND THE FUSED NITRATE SUFFICIENT TO MELT THE ALUMINUM, AND THEN COALESCING THE MELTED ALUMINUM BY AGITATION.
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |