Patents by Inventor Ismael A. Hernandez

Ismael A. Hernandez 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).

  • Hollow fiber identification
    Patent number: 5484650
    Abstract: Hollow fibers are differentiated by their void being partially filled with a differentiating characteristic that is a protuberance of characterizing polymer material. This material may be the same or different from that of the rest of the fiber. The protuberance is provided by appropriate adjustment of the spinning capillary, i.e., during extrusion to form the fiber.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: January 16, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ismael A. Hernandez
  • Pillows and other filled articles and in their filling materials
    Patent number: 5458971
    Abstract: Pillows and other filled articles are filled with bicomponent polyester fibers that have "spiral crimp" on account of a difference in chain-branched content of the polyester polymers of the components. Such bicomponent fibers are preferably novel hollow "spiral crimp" bicomponent fibers.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: October 17, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Ismael A. Hernandez, William J. Jones, Jr., Darren S. Quinn