Patents Represented by Attorney Charles Achkar

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  • Preparation of yellow pigments
    Patent number: 7115164
    Abstract: A process for the manufacture of a transparent Pigment Yellow 155 or transparent Pigment Yellow 180 is disclosed, said process includes grinding particles of said pigment in the presence of a grinding agent until said particles achieve a surface area of at least about 40 m2/g.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: October 3, 2006
    Assignee: Sun Chemical Corporation
    Inventors: George H. Robertson, Edward H. Sung, Veronica L. Chambers