Tantalum-material multilevel distillation crucible and distillation process
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United States of America Patent
Stats
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Feb 9, 2016
Grant Date -
Feb 6, 2014
app pub date -
Apr 10, 2012
filing date -
Apr 11, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A tantalum-material multilevel distillation crucible; the distillation crucible comprises a crucible body (1), an insulation plate (2), and a receiving hood (3); the insulation plate (2) is sheathed in the upper part of the crucible body (1), and the receiving cover is disposed on top of the crucible body (1) and above the insulation plate (2); the crucible body (1) is made of tantalum in a horn-shaped circular truncated cone increasing in size from top to bottom; and the insulation plate (2) is made of a high-temperature resistant refractory material with good insulation performance, characterized by: the insulation plate (2) comprises of a plurality of insulation plates that can be stacked and used (2); and a heating unit (6) provided with a plurality of pads (5) that can be stacked and used at the bottom of the crucible. According to the present invention, the height of a crucible buried in a heat source can be adjusted, enabling one crucible to be used for distillation of various kinds of rare earth metals.

First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
JIANGXI RARE EARTH AND RARE METALS TUNGSTEN GROUP HOLDING CO LTD | NO 118 BEIJING WEST ROAD NANCHANG JIANGXI 330046 |
International Classification(s)

- [Classification Symbol]
- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Tao, Limin | Jiangxi, CN | 1 | 1 |
Xu, Qiuhua | Jiangxi, CN | 1 | 1 |
Yuan, Ping | Jiangxi, CN | 80 | 515 |
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11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 9, 2027 |
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Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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