US4622211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for solidification with resistance heater and magnets
Assignee: Sony Corp
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Filing: 1983-12-16
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Granted: 1986-11-11
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Expires: 2003-12-16
Abstract
Abstract An apparatus for solidification comprising a container for a liquid material which is to be solidified and an electric heater around the container and energized to melt the liquid material, a pair of magnets beside the container producing a stationary magnetic field, a source of electricity to supply substantially DC current to said heater and means for pulling a solid crystal from said liquid material.
Inventors
- 👤 Toshihiko Suzuki
- 👤 Nobuyuki Isawa
- 👤 Yasunori Ohkubo
- 👤 Kinji Hoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:41
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/02; C30B29/06; C30B15/00; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10S117/917; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1036; Y10T117/1044; Y10T117/1068; Y10T117/1092
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
An apparatus for solidification comprising, a container made of an electrical insulator for a liquid material to be solidified, an electric resistance heater around said container energized to melt said liquid material, a pair of magnets beside said container producing a stationary magnetic field, a source of electricity to supply DC current with ripple components less than 4% and to eliminate strong vibration to said heater and means for pulling a solid crystal from said liquid material.
Claim 2
Independent Claim
77 words
An apparatus for solidification comprising, a container made of an electrical insulator for a liquid material to be solidified, an electric resistance heater around said container energized to melt said liquid material, a pair of magnets beside said container producing a stationary magnetic field, a source of electricity to supply DC current with ripple components less than 4% and to eliminate strong vibration to said heater and means for pulling a solid crystal from said liquid material.
Claim 3
Dependent Claim
15 words
An apparatus according to claim 1, wherein said heater is placed in said magnetic field.
Claim 4
Dependent Claim
15 words
An apparatus according to claim 1, wherein said magnetic field passes through said molten material.
Claim 5
Dependent Claim
12 words
An apparatus according to claim 1, wherein said container is a crucible.
Claim 6
Dependent Claim
19 words
An apparatus according to claim 1, wherein said electric heater has vertical components relative to said stationary magnetic field.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |