Patents by Inventor Layton T. Hulette

Layton T. Hulette 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).

  • Aromatic polyamide paper with thickened edge areas and process for making same
    Patent number: 5028300
    Abstract: Disclosed is an elongate, nonwoven flexible sheet structure and a method for its manufacture. The sheet structure consists essentially of a commingled mixture of about 45 to about 70% by weight short fibers of aromatic polyamide and about 30 to about 55% by weight fibrids of poly(meta-phenylene isophthalamide). The sheet structure has an interior thickness remote from the edges of between about 75 and about 150 microns with a thickened area along and adjacent each of the side edges having a maximum thickness which is at least about 5% greater in average thickness than the interior thickness of the sheet along and adjacent the thickened areas.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: July 2, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Peter J. Hollberg, Layton T. Hulette