Patent Assignment Abstract of Title
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Total Assignments:
2
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Patent #:
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Issue Dt:
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06/17/1997
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Application #:
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08617451
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Filing Dt:
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03/19/1996
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Inventors:
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CHENGYE YUAN, HENGLI MA
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Title:
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EXTRACTION OF RARE EARTH ELEMENTS USING ALKYL PHOSPHINIC ACID OR SALT/ALKYL PHOSPHONIC ACID OR ESTER BLENDS AS EXTRACTANT
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Assignment:
1
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ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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| SUITE 1300 |
| 1105 NORTH MARKET STREET |
| WILMINGTON, DELAWARE 19801 |
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| FRANK M. VAN RIET |
| 1937 WEST MAIN STREET |
| P.O. BOX 60 |
| STAMFORD, CONNECTICUT 06904-0060 |
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Assignment:
2
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ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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| 1105 NORTH MARKET STREET, SUITE 1300 |
| WILMINGTON, DELAWARE 19801 |
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| FRANK M. VAN RIET |
| 1937 WEST MAIN STREET |
| P.O. BOX 60 |
| STAMFORD, CT 06904-0060 |
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