Patents by Inventor John P. Hendrix, Jr.

John P. Hendrix, Jr. 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).

  • Method of making improved polyester filaments, yarns and tows
    Patent number: 5244616
    Abstract: Air-jet texturing with drawing, especially cold-drawing, or hot-drawing or other heat-treatments of spin-oriented crystalline polyester filaments, and particularly polyester feed yarns, that have been prepared by spinning at speeds of, e.g., 4 km/min, and have low shrinkage and no natural draw ratio in the conventional sense, provides useful technique for obtaining uniform drawn filaments of desired denier and thereby provides improved flexibility to obtain air-jet textured filaments and yarns of various denier. The resulting yarns have useful properties that are improved in certain respects.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: September 14, 1993
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John P. Hendrix, Jr., Benjamin H. Knox, James B. Noe
  • Method of making improved polyester filaments, yarns and tows
    Patent number: 5145623
    Abstract: Drawing, especially cold-drawing, or hot-drawing or other heat-treatments of spin-oriented crystalline polyester filaments, and particularly polyester feed yarns, that have been prepared by spinning at speeds of, e.g., 4 km/min, and have low shrinkage and no natural draw ratio in the conventional sense, provides useful technique for obtaining uniform drawn filaments of desired denier and thereby provides improved flexibility to obtain filaments and yarns of various sub-deniers.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: September 8, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John P. Hendrix, Jr., Benjamin H. Knox, Joe F. London, Jr., James B. Noe