Patents by Inventor Steven Michael Hansen

Steven Michael Hansen 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 of open-end spinning of polyester staple fiber
    Patent number: 6413631
    Abstract: Polyester yarns whose polyester fibers are of simple oval peripheral cross-section of aspect ratio at least about 1.85:1 have shown better dye yield in fabrics than polyester staple fibers having lower aspect ratios. Such superior cross-sections for polyester staple fibers have also provided advantages in open-end spinning in providing yarns with fewer spinning failures than fibers of conventional round cross-section.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: July 2, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Peter Van Alston, Patrick Joseph Duncan, Steven Michael Hansen
  • Polyester staple fiber
    Patent number: 6010789
    Abstract: Polyester staple fibers of simple oval peripheral cross-section of aspect ratio at least about 1.85:1 provide advantages both in open-end spinning (to provide yarns with fewer spinning failures than such fibers of conventional round cross-section) and better dye yield in fabrics than polyester staple fibers having other oval cross-sections, especially those having lower aspect ratios.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: January 4, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Peter Van Alston, Patrick Joseph Duncan, Steven Michael Hansen