Patents by Inventor Arthur Lulay

Arthur Lulay 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).

  • Process for preparing slub yarns
    Patent number: 4324095
    Abstract: Slub yarns are prepared by adding 10-50% by weight 0.25 to 1 in. long bicomponent acrylic fibers having a density of about 1.0 to 1.17 g/cm.sup.3 and an equilibrium crimp reversibility of at least about 20% with staple fibers during or before carding and processing to a slub containing spun yarn in a conventional manner.
    Type: Grant
    Filed: January 11, 1978
    Date of Patent: April 13, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arthur Lulay, Charles E. Lynch
  • Boucle yarn and process for its preparation
    Patent number: 4244173
    Abstract: A boucle yarn is prepared by relaxed heat treatment of a precursor yarn prepared by combination of a low shrinkage filament or yarn or monofil at the back of the front roller of a spinning frame with a roving of high shrinkage fibers followed by twisting to a twist multiplier of 1.5 to 4.0. The shrinkage differential between the high shrinkage fibers and the low shrinkage fibers must be at least 20%.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: January 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Arthur Lulay