Patent US3778395A successfully refreshed from Google Patents.
US3250842A
Expired / Lapsed
US
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Electron beam zone refining
Assignee: United States Atomic Energy Commission
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Filing: 1963-01-15
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Granted: 1966-05-10
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Expires: 1983-01-15
Abstract
No abstract record available.
Inventors
- 👤 Hikido Tsutomu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0438; C; C30; C30B; C30B13/00; C30B13/16; C30B13/22; H01; H01J; H01J37/00; H01J37/30; H01J37/305; Y; Y10; Y10S; Y10S117/00; Y10S117/905; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1076; Y10T117/1088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
IN A ZONE REFINING ELECTRON BOMBARDMENT FURNACE INCLUDING A MELTING CHAMBER, AN ELECTRON GUN, MEANS FOR COLLIMATING AND FOCUSING THE ELECTRONS PROVIDED BY SAID GUN INTO A BEAM, MEANS FOR DIRECTING SAID ELECTRON BEAM INTO SAID CHAMBER, AND MEANS FOR EVACUATING SAID FURNACE, THE IMPROVEMENT COMPRISING A PAIR OF ELECTROMAGNETIC SHAPING MAGNETS MOUNTED BETWEEN SAID COLLIMATINGFOCUSING MEANS AND SAID CHAMBER, SAID MAGNETS BEING PLACED ONE ON EITHER SIDE OF SAID BEAMS AND ORIENTED NORMAL TO THE AXIS OF SAID BEAM, A WATER-COOLED HEARTH DISPOSED IN SAID CHAMBER, SAID HEARTH BEING PROVIDED WITH A CAVITY FOR RECEIVING A SAMPLE TO BE ZONE REFINED, MEANS FOR ADJUSTING THE CURRENT FLOW TO SAID MAGNETS FOR SHAPING SAID ELECTRON BEAM IN A SUBSTANTIALLY FLAT RECTANGULAR SHAPE, SAID FLAT BEAM BEING NORMAL TO THE SURFACE OF SAID SAMPLE, SAND MEANS FOR MOVING SAID HEARTH AT A SELECTED RATE OF SPEED SUCH THAT A SAMPLE PLACED IN SAID HEARTH CAVITY IS MOVED ALONG SAID RECTANGULAR SHAPED BEAM DURING A ZONE REFINING OPERATION, SAID FLAT ELECTRON BEAM PROVIDING A NARROW MOLTEN ZONE IN SAID SAMPLE WHICH MOVES ALONG SAID SAMPLE DURING SAID OPERATION, SAID SHORT MOLTEN ZONE
Claim 2
Dependent Claim
190 words
IN A ZONE REFINING ELECTRON BOMBARDMENT FURNACE INCLUDING A MELTING CHAMBER, AN ELECTRON GUN, MEANS FOR COLLIMATING AND FOCUSING THE ELECTRONS PROVIDED BY SAID GUN INTO A BEAM, MEANS FOR DIRECTING SAID ELECTRON BEAM INTO SAID CHAMBER, AND MEANS FOR EVACUATING SAID FURNACE, THE IMPROVEMENT COMPRISING A PAIR OF ELECTROMAGNETIC SHAPING MAGNETS MOUNTED BETWEEN SAID COLLIMATINGFOCUSING MEANS AND SAID CHAMBER, SAID MAGNETS BEING PLACED ONE ON EITHER SIDE OF SAID BEAMS AND ORIENTED NORMAL TO THE AXIS OF SAID BEAM, A WATER-COOLED HEARTH DISPOSED IN SAID CHAMBER, SAID HEARTH BEING PROVIDED WITH A CAVITY FOR RECEIVING A SAMPLE TO BE ZONE REFINED, MEANS FOR ADJUSTING THE CURRENT FLOW TO SAID MAGNETS FOR SHAPING SAID ELECTRON BEAM IN A SUBSTANTIALLY FLAT RECTANGULAR SHAPE, SAID FLAT BEAM BEING NORMAL TO THE SURFACE OF SAID SAMPLE, SAND MEANS FOR MOVING SAID HEARTH AT A SELECTED RATE OF SPEED SUCH THAT A SAMPLE PLACED IN SAID HEARTH CAVITY IS MOVED ALONG SAID RECTANGULAR SHAPED BEAM DURING A ZONE REFINING OPERATION, SAID FLAT ELECTRON BEAM PROVIDING A NARROW MOLTEN ZONE IN SAID SAMPLE WHICH MOVES ALONG SAID SAMPLE DURING SAID OPERATION, SAID SHORT MOLTEN ZONE
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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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |