US2840463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degassing and purifying molten aluminous metal
Assignee: Alcoa Corp
•
Filing: 1954-05-13
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Granted: 1958-06-24
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Expires: 1974-05-13
Abstract
No abstract record available.
Inventors
- 👤 Philip T Stroup
- 👤 Kenneth J Brondyke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:22
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/06; C22B21/066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE METHOD OF DEGASSING AND PURIFYING MOLTEN ALUMINOUS METAL PRELIMINARY TO CASTING THE SAME COMPRISING FILLING A CONFINED SPACE AT SUBSTANTIALLY ATMOSPHERIC PRESSURE WITH AN ATMOSPHERE CONTAINING ALUMIUM CHLORIDE AS THE ESSENTIAL DEGASSING COMPONENT, INTRODUCING MORE ALUMINUM CHLORIDE TO SAID SPACE WHILE SIMULTANEOUSLY WITHDRAWING PREVIOUSLY INTRODUCED ALUMINUM CHLORIDE WHEREBY A CONTINUOUSLY CHANGING ATMOSPHERE IS PROVIDED IN SAID SPACE AT SUBSTANTIALLY ATMOSPHERIC IS PROVIDED DIVIDING THE MOLTEN METAL AS IT ENTERS THE CONFINED SPACE CONTAINING SAID ATMOSPHERE, PASSING SAID SUBDIVIDED LIQUID METAL THROUGH THE ATMOSPHERE WHEREBY THE GAS CONTENT OF THE METAL IS REDUCED AND THE METAL IS PURIFIED WITHOUT SUBSTANTIAL CHANGE IN THE ALUMINUM CONTENT OF THE MELT, COLLECTING THE TREATED LIQUID METAL AND THEREAFTER DISCHARGING IT WHILE MOLTEN FROM SAID CONFINED SPACE.
Claim 2
Independent Claim
123 words
THE METHOD OF DEGASSING AND PURIFYING MOLTEN ALUMINOUS METAL PRELIMINARY TO CASTING THE SAME COMPRISING FILLING A CONFINED SPACE AT SUBSTANTIALLY ATMOSPHERIC PRESSURE WITH AN ATMOSPHERE CONTAINING ALUMIUM CHLORIDE AS THE ESSENTIAL DEGASSING COMPONENT, INTRODUCING MORE ALUMINUM CHLORIDE TO SAID SPACE WHILE SIMULTANEOUSLY WITHDRAWING PREVIOUSLY INTRODUCED ALUMINUM CHLORIDE WHEREBY A CONTINUOUSLY CHANGING ATMOSPHERE IS PROVIDED IN SAID SPACE AT SUBSTANTIALLY ATMOSPHERIC IS PROVIDED DIVIDING THE MOLTEN METAL AS IT ENTERS THE CONFINED SPACE CONTAINING SAID ATMOSPHERE, PASSING SAID SUBDIVIDED LIQUID METAL THROUGH THE ATMOSPHERE WHEREBY THE GAS CONTENT OF THE METAL IS REDUCED AND THE METAL IS PURIFIED WITHOUT SUBSTANTIAL CHANGE IN THE ALUMINUM CONTENT OF THE MELT, COLLECTING THE TREATED LIQUID METAL AND THEREAFTER DISCHARGING IT WHILE MOLTEN FROM SAID CONFINED SPACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |