Patent US3734720A successfully refreshed from Google Patents.
US3734720A
Expired / Lapsed
US
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Method of separating substances from a melt of good electrical conductivity
Assignee: SMS Elotherm GmbH
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Filing: 1971-06-01
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Granted: 1973-05-22
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Expires: 1991-06-01
Abstract
Abstract A METHODOF SEPARATING FROM A MELT SUBSTANCES HAVING SOLUBILITIES WHICH DECREASE WITH DECREASING TEMPERATURE WHEREBY THE MELT IS CONVEYED BY AN ELECTRO-MAGNETIC FIELD UP AN ASCENDING CONVEYOR THROUGH FROM A ELECTRO-MAGNETIC FIELD SEL AND A TEMPERATURE GRADIENT GENERATED ALONG THE TROUGH TO CAUSE THE SUBSTANCES TO PRECIPITATE.
Inventors
- 👤 Starck A Von
- 👤 F Pawlek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:07
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/02; C21; C21C; C21C5/00; C21C5/52; C21C5/5241; C21C5/5247; C22B13/00; C22B13/06; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |