Patents by Inventor Peter E. Frankenburg

Peter E. Frankenburg 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).

  • Hydraulically entangled PTFE/glass filter felt
    Patent number: 4612237
    Abstract: A non-woven felt suitable for use as a filter comprised of poly(tetrafluoroethylene) and glass fibers hydraulically entangled to a supporting scrim and a process for making said felt are disclosed. The scrim is made from high temperature and chemically resistant materials.
    Type: Grant
    Filed: December 13, 1985
    Date of Patent: September 16, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Peter E. Frankenburg
  • Foundry workers' protective garment
    Patent number: 4569088
    Abstract: A garment for protection against molten metals is constructed of a composite fabric having an area weight of no more than 1000 g/m.sup.2 comprised of an outer layer which is a visually continuous, optically opaque sheet of poly(tetrafluoroethylene) fibers having an area weight of at least 170 g/m.sup.2 securely attached throughout its interface with an inner durable fabric layer of non-fusible, textile fibers having an area weight of 70-700 g/m.sup.2.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: February 11, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Peter E. Frankenburg, Herbert G. Lauterbach
  • Filter of poly(tetrafluoroethylene) and glass fibers
    Patent number: 4361619
    Abstract: 65-99 percent by weight poly(tetrafluoroethylene) fibers and 1-35 percent by weight glass fibers are combined in an intimate blend suitable for the preparation of filter felts having reduced leakage while maintaining high permeability to gas flow.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: November 30, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Herman H. Forsten, Peter E. Frankenburg, Jagdish N. Shah