Patents Represented by Attorney Andrew L. Schaeffer

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  • Stain-resistant, pigmented nylon fibers
    Patent number: 5830572
    Abstract: Producer-colored nylon fibers which are stain-resistant to acid dyes are made by adding pigment to nylon copolymers containing 0.25-4.0 percent by weight of an aromatic sulfonate or an alkali metal salt thereof. In addition process advantages relating to the use of the same copolymers in making pigmented nylon fibers are also disclosed.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: November 3, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Anthony Anton, Peter Ray Witt, Linda Hoeflich Sauerbrunn, Diane Marie Scholler, William Paul Parmelee, William Thomas Windley, Paul Sheldon Pearlman