Patents by Inventor Peter Ray Witt

Peter Ray Witt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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
  • Flame resistant linear polyesters
    Patent number: 3960806
    Abstract: Flame-retardant polyester filaments of excellent whiteness are prepared from dimethyl terephthalate, ethylene glycol and 2,2-bis-[4-(2-hydroxyethoxy)-3,5-dibromophenyl] propane by a continuous process as illustrated in the drawing. Conducting the polymerization within a holdup time of 2.5 hours at temperatures from about 273.degree. to about 290.degree. C. is shown to provide flame-retardant filaments having excellent whiteness. Addition of 7-naphtha-triazinyl-3-phenylcoumarin and a blue toner further improve the whiteness value and the inclusion of antimony oxide provides even greater flame retardance.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: June 1, 1976
    Assignee: Emery Industries, Inc.
    Inventors: Gerald Costa Najour, Peter Ray Witt