US3230073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for vacuum degassing with electromagnetic stirring
Assignee: ABB Norden Holding AB
•
Filing: 1962-07-20
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Granted: 1966-01-18
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Expires: 1982-07-20
Abstract
No abstract record available.
Inventors
- 👤 Ericsson Curt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:59
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/34; C; C22; C22B; C22B9/00; C22B9/04; H05B2213/00; H05B2213/02; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
METHOD FOR TREATING A MOLTEN METAL WHICH COMPRISES MELTING THE METAL, PLACING THE MOLTEN METAL IN A CONTAINER HAVING A STEEL SHELL, PLACING THE CONTAINER IN A VACUUM CHAMBER IN THE FIELD OF A STATIONARY ELECTROMAGNETIC MULTIPHASE STIRRING MEANS POSITIONED OUTSIDE AND AT THE SIDE OF THE CONTAINER, EVACUATING THE CHAMBER, AND SUBJECTING THE MOLTEN METAL WHILE WITHIN THE VACUUM CONTAINER TO A STIRRING ACTION BY FEEDING TO THE STIRRING MEANS CURRENT AT A FREQUENCY OF BETWEEN ABOUT 0.5 TO 10 CYCLES PERR SECOND, SAID STIRRER PRODUCING VERTICAL MOVEMENTS IN THE MOLTEN METAL FROM PARTS CLOSE TO THE BOTTOM OF THE CONTAINER TO THE SURFACE OF THE MELT.
Claim 2
Dependent Claim
108 words
METHOD FOR TREATING A MOLTEN METAL WHICH COMPRISES MELTING THE METAL, PLACING THE MOLTEN METAL IN A CONTAINER HAVING A STEEL SHELL, PLACING THE CONTAINER IN A VACUUM CHAMBER IN THE FIELD OF A STATIONARY ELECTROMAGNETIC MULTIPHASE STIRRING MEANS POSITIONED OUTSIDE AND AT THE SIDE OF THE CONTAINER, EVACUATING THE CHAMBER, AND SUBJECTING THE MOLTEN METAL WHILE WITHIN THE VACUUM CONTAINER TO A STIRRING ACTION BY FEEDING TO THE STIRRING MEANS CURRENT AT A FREQUENCY OF BETWEEN ABOUT 0.5 TO 10 CYCLES PERR SECOND, SAID STIRRER PRODUCING VERTICAL MOVEMENTS IN THE MOLTEN METAL FROM PARTS CLOSE TO THE BOTTOM OF THE CONTAINER TO THE SURFACE OF THE MELT.
References Cited (Backward Citations)
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Cited
US1277523A
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GB339579A
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US2513082A
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GB702225A
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US2675414A
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US2686823A
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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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |