Patents Represented by Attorney Debra Pawl

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  • Low brightness functional pigment from process by-product
    Patent number: 5385239
    Abstract: A low brightness pigment and method is provided from a heretofore rejected waste kaolin stream. Kaolin processing rejects are high in iron-stained TiO.sub.2. After separating the stained TiO.sub.2 from the high brightness kaolin and concentrating the resulting fraction, the material can be processed to produce a low brightness pigment suitable of many applications where lower brightness is desirable, such as coating paper board without mottling.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: January 31, 1995
    Assignee: J. M. Huber Corporation
    Inventors: Albert C. Kunkle, Robert E. Hardy, Bobby R. Skipper