US2852351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous zone-refining
Assignee: AT&T Inc
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Filing: 1957-06-25
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Granted: 1958-09-16
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Expires: 1977-06-25
Abstract
No abstract record available.
Inventors
- 👤 William G Pfann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:29
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/005; C01; C01D; C01D9/00; C01D9/16; H; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
230 words
THE PROCESS OF REDISTRIBUTING IN INGREDIENTS OF A FUSIBLE MATERIAL CONTAINING AT LEAST TWO INGREDIENTS, AT LEAST ONE OF WHICH HAS A SEGREGATION COEFFICIENT WHICH DIFFERS FROM UNITY, WITHIN A RECEPTACLE COMPRISING CAUSING RELATIVELY HOT AND COLD REGIONS ALTERNATELY SPACED TO PROGRESS IN ONE DIRECTION THROUGH AT LEAST A PORTION OF THE SAID MATERIAL WITHIN THE RECEPTACLE, THE TEMPERATURE OF THE SAID HOT REGION BEING AT LEAST AS GREAT AS THE MELTING POINT OF THE SAID MATERIAL THEREIN, AND THE TEMPERATURE OF THE COLD REGION BEING BELOW THE MELTING POINT OF THE MATERIAL THEREIN, REMOVING MATERIAL AT A FIRST POSITION IN THE RECEPTACLE IN AN AMOUNT LESS THAN THE AMOUNT CONTAINED WITHIN A HOT REGION EACH TIME THE MATERIAL AT THAT POSITION IS MOLTEN AND ADDING, AT A SOUND POSITION WITHIN THE RECEPTACLE AND AT A HIGHER ELEVATION THAN THE SAID FIRST POSITION, FUSIBLE MATERIAL OF THE SYSTEM UNDERGOING TREATMENT IN AN AMOUNT EQUAL TO THE AMOUNT WITHDRAWN, THE PROCESSING CONDITIONS BEING SUCH THAT ANY RESTRAINT ON THE UPPER SURFACE OF THE FUSIBLE MATERIAL UNDERGOING TREATMENT IS YIELDABLE SO THAT THE SAID WITHDRAWAL OF MATERIAL AND THE SAID ADDITION OF MATERIAL RESULTS IN AN UPPER SURFACE OF MATERIAL UNDERGOING TREATMENT WHICH IS INCLINED INTERMEDIATE THE POSITION OF WITHDRAWAL AND THE POSITION OF ADDITION SUCH THAT THE POSITION OF HIGHEST ELEVATION OF THE INCLINED SURFACE CORRESPONDS WITH THE POSITION OF ADDITION.
Claim 2
Dependent Claim
230 words
THE PROCESS OF REDISTRIBUTING IN INGREDIENTS OF A FUSIBLE MATERIAL CONTAINING AT LEAST TWO INGREDIENTS, AT LEAST ONE OF WHICH HAS A SEGREGATION COEFFICIENT WHICH DIFFERS FROM UNITY, WITHIN A RECEPTACLE COMPRISING CAUSING RELATIVELY HOT AND COLD REGIONS ALTERNATELY SPACED TO PROGRESS IN ONE DIRECTION THROUGH AT LEAST A PORTION OF THE SAID MATERIAL WITHIN THE RECEPTACLE, THE TEMPERATURE OF THE SAID HOT REGION BEING AT LEAST AS GREAT AS THE MELTING POINT OF THE SAID MATERIAL THEREIN, AND THE TEMPERATURE OF THE COLD REGION BEING BELOW THE MELTING POINT OF THE MATERIAL THEREIN, REMOVING MATERIAL AT A FIRST POSITION IN THE RECEPTACLE IN AN AMOUNT LESS THAN THE AMOUNT CONTAINED WITHIN A HOT REGION EACH TIME THE MATERIAL AT THAT POSITION IS MOLTEN AND ADDING, AT A SOUND POSITION WITHIN THE RECEPTACLE AND AT A HIGHER ELEVATION THAN THE SAID FIRST POSITION, FUSIBLE MATERIAL OF THE SYSTEM UNDERGOING TREATMENT IN AN AMOUNT EQUAL TO THE AMOUNT WITHDRAWN, THE PROCESSING CONDITIONS BEING SUCH THAT ANY RESTRAINT ON THE UPPER SURFACE OF THE FUSIBLE MATERIAL UNDERGOING TREATMENT IS YIELDABLE SO THAT THE SAID WITHDRAWAL OF MATERIAL AND THE SAID ADDITION OF MATERIAL RESULTS IN AN UPPER SURFACE OF MATERIAL UNDERGOING TREATMENT WHICH IS INCLINED INTERMEDIATE THE POSITION OF WITHDRAWAL AND THE POSITION OF ADDITION SUCH THAT THE POSITION OF HIGHEST ELEVATION OF THE INCLINED SURFACE CORRESPONDS WITH THE POSITION OF ADDITION.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |