Patents by Inventor David Jeffrey Powell

David Jeffrey Powell 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).

  • Aramid papers of improved solvent resistance and dimensionally stable laminates made therefrom
    Patent number: 5910231
    Abstract: A process for increasing the solvent resistance of calendered paper consisting of poly(p-phenylene terephthalamide) short fibers and poly(m-phenylene isophthalamide) fibrids and the dimensional stability of laminates made therefrom.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: June 8, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Birol Kirayoglu, David Jeffrey Powell