US3039864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of molten light metals
Assignee: Alcoa Corp
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Filing: 1958-11-21
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Granted: 1962-06-19
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Expires: 1978-11-21
Abstract
No abstract record available.
Inventors
- 👤 Paul D Hess
- 👤 Kenneth J Brondyke
- 👤 Jarrett Noel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:29
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/06; C22B21/066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN THE TREATMENT OF MOLTEN LIGHT METALS FOR THE SUBSTANTIAL REMOVAL THEREFROM OF GAS AND FINELY DIVIDED SOLIDS, THE METHOD COMPRISING PROVIDING A CONTAINER THROUGH WHICH THE MOLTEN LIGHT METAL IS PASSED, SAID CONTAINER HAVING A FILTER BED THEREIN COMPOSED OF REFRACTORY GRANULES 3 TO 14 MESH IN SIZE AND INERT TOWARD THE MOLTEN LIGHT METAL, COMPLETELY COVERING SAID BED WITH MOLTEN METAL, INTRODUCING METAL TO BE TREATED ABOVE THE BED AND PASSING IN DOWNWARDLY THERETHROUGH, AT THE SAME TIME PASSING AN INERT FLUXING GAS UPWARDLY THROUGH AT LEAST A PORTION OF THE BED AND IN COUNTER CURRENT RELATIONSHIP TO THE DESCENDING MOLTEN METAL FOR A DISTANCE OF AT LEAST TWO INCHES IN THE BED, SAID FLUXING GAS AS SPENT GAS AND THE GAS DERIVED FROM THE MOLTEN METAL BEING RELEASED FROM THE SURFACE OF MOLTEN METAL THAT HAS NOT PASSED THROUGH SAID BED.
Claim 2
Dependent Claim
144 words
IN THE TREATMENT OF MOLTEN LIGHT METALS FOR THE SUBSTANTIAL REMOVAL THEREFROM OF GAS AND FINELY DIVIDED SOLIDS, THE METHOD COMPRISING PROVIDING A CONTAINER THROUGH WHICH THE MOLTEN LIGHT METAL IS PASSED, SAID CONTAINER HAVING A FILTER BED THEREIN COMPOSED OF REFRACTORY GRANULES 3 TO 14 MESH IN SIZE AND INERT TOWARD THE MOLTEN LIGHT METAL, COMPLETELY COVERING SAID BED WITH MOLTEN METAL, INTRODUCING METAL TO BE TREATED ABOVE THE BED AND PASSING IN DOWNWARDLY THERETHROUGH, AT THE SAME TIME PASSING AN INERT FLUXING GAS UPWARDLY THROUGH AT LEAST A PORTION OF THE BED AND IN COUNTER CURRENT RELATIONSHIP TO THE DESCENDING MOLTEN METAL FOR A DISTANCE OF AT LEAST TWO INCHES IN THE BED, SAID FLUXING GAS AS SPENT GAS AND THE GAS DERIVED FROM THE MOLTEN METAL BEING RELEASED FROM THE SURFACE OF MOLTEN METAL THAT HAS NOT PASSED THROUGH SAID BED.
References Cited (Backward Citations)
GB297086A
Cited
US1972432A
Cited
US1994358A
Cited
GB684048A
Cited
FR1040447A
Cited
US2821472A
Cited
US2863558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |