Patents by Inventor Walter L. Edwards

Walter L. Edwards 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).

  • Methods of making imide-modified polyester resins
    Patent number: 7238770
    Abstract: The present invention relates to methods of making imide-modified polyester imide resins. The present invention further relates to forming these imide-modified polyester imide resins into articles, such as preforms, bottles, containers, sheets, films, fibers, and injection molded parts.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: July 3, 2007
    Assignee: Wellman, Inc.
    Inventors: Walter L. Edwards, Marion L. Andrews