Patents by Inventor Sophie Ung

Sophie Ung 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).

  • PROCESS FOR MAKING POLY(ETHYLENE-CO-ISOSORBIDE) TEREPHTHALATE POLYMER
    Publication number: 20030232959
    Abstract: The present invention is a process for making a low color copolymer of ethylene glycol, isosorbide and terephthalic acid or dimethyl terephthalate. This copolymer, poly(ethylene-co-isosorbide) terephthalate, is useful for making bottles, hot-fill containers, films, sheet, fiber, strand and optical article applications. It can also be used to make polymer blends and alloys.
    Type: Application
    Filed: June 14, 2002
    Publication date: December 18, 2003
    Inventors: Douglas J. Adelman, Larry F. Charbonneau, Sophie Ung
  • Process for making poly(ethylene-co-isosorbide) terephthalate polymer
    Patent number: 6656577
    Abstract: The present invention is a process for making a low color copolymer of ethylene glycol, isosorbide and terephthalic acid or dimethyl terephthalate. This copolymer, poly(ethylene-co-isosorbide) terephthalate, is useful for making bottles, hot-fill containers, films, sheet, fiber, strand and optical article applications. It can also be used to make polymer blends and alloys.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: December 2, 2003
    Assignee: E. I. du Pont de Nemours & Company
    Inventors: Douglas J. Adelman, Larry F. Charbonneau, Sophie Ung