Process of producing neodymium-iron alloy
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 4, 1987
Grant Date -
N/A
app pub date -
Sep 17, 1985
filing date -
Oct 3, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process and an apparatus for producing a neodymium-iron alloy by electrolysis reduction of neodymium fluoride in a bath of molten electrolyte, consisting essentially of 35-76% by weight of neodymium fluoride, 20-60% by weight of lithium fluoride, up to 40% by weight of barium fluoride and up to 20% by weight of calcium fluoride, conducted between one or more iron cathode and one or more carbon anode. The apparatus comprises an electrowinning cell of refractory materials coated inside with a lining resistive to the bath, the carbon anode of constant transverse cross-sectional shape over its length, immersed into the electrolyte bath at its free and, the iron cathode of constant transverse cross-sectional shape over its length, immersed into the electrolytic bath at its free end, a receiver placed on the bottom of the cell for collecting the produced neodymium-iron alloy in a liquid state on the tip of the iron cathode, siphoning means for withdrawing the molten alloy pooled in the receiver out of the cell, and feeding means for feeding the ever wearing iron cathode into the electrolyte bath so as to apply the direct current to the iron cathode with a predetermined current density.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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SANTOKU CORPORATION | KOBE-SHI HYOGO 658-0013 |
International Classification(s)

- 1985 Application Filing Year
- C25C Class
- 77 Applications Filed
- 0 Patents Issued To-Date
- 0 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Itoh, Katsuhisa | Nagoya, JP | 17 | 123 |
# of filed Patents : 17 Total Citations : 123 | |||
Nakamura, Eiji | Chita, JP | 114 | 1003 |
# of filed Patents : 114 Total Citations : 1003 | |||
Toyoshima, Masayasu | Nagoya, JP | 3 | 44 |
# of filed Patents : 3 Total Citations : 44 | |||
Watanabe, Yoshiaki | Nagoya, JP | 193 | 2642 |
# of filed Patents : 193 Total Citations : 2642 |
Cited Art Landscape
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Patent Citation Ranking
- 31 Citation Count
- C25C Class
- 0 % this patent is cited more than
- 38 Age
Forward Cite Landscape
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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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 |
Full Text

Legal Events
Date | Code | Event | Description |
---|---|---|---|
Aug 06, 2002 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SUMITOMO LIGHT METAL INDUSTRIES LIMITED;REEL/FRAME:013184/0840 Owner name: SANTOKU CORPORATION, JAPAN Effective Date: Aug 06, 2002 |
Feb 02, 1999 | FPAY | FEE PAYMENT | year of fee payment: 12 |
Feb 03, 1995 | FPAY | FEE PAYMENT | year of fee payment: 8 |
Dec 03, 1994 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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Feb 04, 1991 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Dec 03, 1990 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Dec 01, 1990 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE HAS ALREADY BEEN PAID. REFUND IS SCHEDULED (ORIGINAL EVENT CODE: F160); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Aug 04, 1987 | I | Issuance | |
Jun 04, 1987 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Sep 17, 1985 | F | Filing | |
Sep 10, 1985 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:ITOH, KATSUHISA;WATANABE, YOSHIAKI;NAKAMURA, EIJI;AND OTHERS;REEL/FRAME:004458/0739 Owner name: SUMITOMO LIGHT METAL INDUSTRIES, LTD. 11-3 5-CHOME Effective Date: Sep 10, 1985 |
Oct 03, 1984 | PD | Priority Date |

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