Patents by Inventor Edward J. Welch

Edward J. Welch 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).

  • Polyarylene sulfide resin coating method
    Patent number: 4130675
    Abstract: The discoloration of finishes derived from coating compositions containing polyarylene sulfide resin can be significantly reduced by applying to the substrate a citrate, carbonate, sulfate or hydroxide of an alkali metal prior to applying the polyarylene sulfide resin composition.
    Type: Grant
    Filed: November 28, 1977
    Date of Patent: December 19, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Eustathios Vassiliou, Edward J. Welch