Patents by Inventor Jon David Hartzler

Jon David Hartzler 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).

  • Polymers and fibers formed therefrom
    Patent number: 7528217
    Abstract: Sulfonated polyoxadiazole polymers containing groups selected from:
    Type: Grant
    Filed: October 6, 2006
    Date of Patent: May 5, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Kiu-Seung Lee, Jon David Hartzler
  • Polymers and fibers formed therefrom
    Publication number: 20080085992
    Abstract: Sulfonated polyoxadiazole polymers containing groups selected from:
    Type: Application
    Filed: October 6, 2006
    Publication date: April 10, 2008
    Inventors: Kiu-Seung Lee, Jon David Hartzler
  • Polyoxadiazole composite fibers
    Publication number: 20080014440
    Abstract: The present invention is directed to preparation of a polyoxadiazole composite fiber and a flexible chain polymer which is not a polyoxadiazole polymer and articles produced therefrom.
    Type: Application
    Filed: July 13, 2006
    Publication date: January 17, 2008
    Inventors: Kiu-Seung Lee, Jon David Hartzler
  • Electrically-conductive para-aramid pulp
    Patent number: 6436236
    Abstract: The present invention relates to electrically-conductive pulp of sulfonated polyaniline blended with para-aramid wherein the para-aramid is a continuous phase in the pulp and the sulfonated polyaniline is a discontinuous phase.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: August 20, 2002
    Assignee: E. I. du Pont de Nemours & Company
    Inventor: Jon David Hartzler
  • Aqueous organic base solution of polyhydrazides
    Patent number: 3966656
    Abstract: This invention relates to novel film- and fiber-forming polyhydrazide solutions (dopes) which are prepared in a solvent system comprising aqueous organic bases. Some dopes of this invention are optically anisotropic.
    Type: Grant
    Filed: September 23, 1974
    Date of Patent: June 29, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jon David Hartzler