Patents by Inventor James V. Hartzog

James V. Hartzog 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).

  • Bicomponent fibers with high wicking rate
    Patent number: 6656586
    Abstract: The invention provides a bicomponent fiber comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) and having: a weight ratio of poly(ethylene terephthalate) to poly(trimethylene terephthalate) of at least about 30:70 and no more than about 70:30, a scalloped oval cross-section selected from the group consisting of side-by-side and eccentric sheath-core; a cross-section long axis; a boundary between the poly(ethylene terephthalate) and the poly(trimethylene terephthalate) that is substantially parallel to the cross-section long axis; and a plurality of longitudinal grooves.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: December 2, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: James V. Hartzog, James M. Howell, Michelle H. Watkins, Claudia Schultze
  • Bicomponent fibers with high wicking rate
    Publication number: 20030082377
    Abstract: The invention provides a bicomponent fiber comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate) and having:
    Type: Application
    Filed: August 27, 2002
    Publication date: May 1, 2003
    Inventors: James V. Hartzog, James M. Howell, Michelle H. Watkins, Claudia Schultze
  • Preparing fine denier staple fibers
    Patent number: 5219506
    Abstract: Fine denier polyester fibers are obtainable from polymer of low molecular weight to have improved uniformity and excellent mechanical properties by a high throughput process.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: June 15, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Harvey G. Anderson, James V. Hartzog, Harold L. Manning, Jr., James W. Tolliver
  • Apparatus for quenching melt spun filaments
    Patent number: 5219582
    Abstract: An apparatus for radially quenching melt spun filaments features a quenching chamber having a foraminous distribution cylinder between the filaments and the gas supply chamber with areas of porosity that increases, from a first low value at a location immediately below the spinneret, through a larger value at lower location, and then decreases toward the exit of the quench chamber.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: June 15, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Harvey G. Anderson, James V. Hartzog, Harold L. Manning, Jr., James W. Tolliver