Patents by Inventor Harry Lee Smith, Jr.

Harry Lee Smith, 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).

  • Two step preparation of random polyoxadiazole copolymer and articles resulting therefrom
    Patent number: 7582721
    Abstract: In a preparation of random polyoxadiazole copolymer by reaction of a mixture of oleum, hydrazine sulfate, terephthalic acid, and isophthalic acid, the improvement requires the addition of oleum in more than one step.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: September 1, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Kiu-Seung Lee, Harry Lee Smith, Jr.
  • Two step preparation of random polyoxadiazole copolymer and articles resulting therefrom
    Patent number: 7528216
    Abstract: In a preparation of random polyoxadiazole copolymer by reaction of a mixture of oleum, hydrazine sulfate, terephthalic acid, and isophthalic acid, the improvement requires the addition of oleum in more than one step.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: May 5, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Kiu-Seung Lee, Harry Lee Smith, Jr.