Patents Represented by Attorney Joeseph C. Gil

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  • Dry dyestuff powders with enhanced water solubility
    Patent number: 4802888
    Abstract: The present invention is concerned with improving the solubility of anionic water soluble dyestuff powders. The solubility of these powders particularly in cold water, is enhanced by adding (i) a chelating agent which has at least two free acid groups and (ii) a Lewis base in an amount sufficient to bring the pH of the water solution of the powder to a value of about 7-10.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: February 7, 1989
    Assignee: Mobay Corporation
    Inventors: Charles W. Sandefur, Thomas J. Thomas