Patent Assignment Details
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For pending or abandoned applications please consult USPTO staff.
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Reel/Frame: | 012569/0506 | |
| Pages: | 3 |
| | Recorded: | 01/29/2002 | | |
Conveyance: | ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). |
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Total properties:
3
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Patent #:
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Issue Dt:
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10/25/1988
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Application #:
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07069991
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Filing Dt:
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07/06/1987
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Title:
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PROCESS FOR PURIFYING PHOSPHORIC ACID
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Patent #:
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Issue Dt:
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02/14/1989
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Application #:
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07107329
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Filing Dt:
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10/13/1987
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Title:
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PROCESS FOR PURIFYING PHOSPHORIC ACID FOR ELECTRICAL SEMICONDUCTOR USE
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Patent #:
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Issue Dt:
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04/09/1991
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Application #:
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07164289
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Filing Dt:
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03/04/1988
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Title:
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PROCESS FOR REMOVING IRON, CHROMIUM AND VANADIUM FROM PHOSPHORIC ACID
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Assignee
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622 EMERSON ROAD |
ST. LOUIS, MISSOURI 63141 |
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Correspondence name and address
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MCDERMOTT, WILL & EMERY
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PATRICK D. RICHARDS
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227 WEST MONROE STREET
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CHICAGO, IL 60606
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