Patents by Inventor Lee James Hesler

Lee James Hesler 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).

  • Patent number: 5998309
    Abstract: Aramid sheet material and parts molded therefrom comprising m-aramid fibrids containing up to 10% by weight dyes that are thermally stable up to the glass transition temperature of the m-aramid polymer and p-aramid or m-aramid short fibers.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: December 7, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Lee James Hesler
  • Patent number: 5965072
    Abstract: Aramid sheet material and parts molded therefrom comprising m-aramid fibrids containing up to 10% by weight dyes that are thermally stable up to the glass transition temperature of the m-aramid polymer and p-aramid or m-aramid short fibers.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: October 12, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Lee James Hesler
  • Patent number: 5667900
    Abstract: Aramid paper with high surface smoothness is offered, wherein [said aramid paper] is characterized by the fact that a surface layer, which contains 100 wt % of poly(metaphenylene isophthalamide) fibrids, which weighs less than 10 g/m.sup.2, and which has a coating ratio of 97% or higher, and an intermediate layer, which comprises 70 to 90 wt % of poly(metaphenylene isophthalamide) fibrids and 10 to 30 wt % of poly(metaphenylene isophthalamide) flocks and weighs 20 g/m.sup.2 or less, are laminated successively on at least one side of the substrate layer which comprises 25 to 60 wt % of said fibrids and 40 to 75 wt % of said flocks, that the surface smoothness of the surface layer is 40 sec per 10 cc or higher, and that the number of fuzz fibers at least 1 mm long, which are generated by surface friction, does not exceed 5 fibers per 25 cm.sup.2. Said aramid paper can be suitably used as electrical insulation paper, heat-resistant labeling paper, heat resistant paper, and the like.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: September 16, 1997
    Assignees: E. I. Du Pont de Nemours and Company, Mishima Paper Ltd.
    Inventors: Ippei Kato, Yuji Kimura, Lee James Hesler