Patents by Inventor Stephen C. Newman

Stephen C. Newman 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).

  • Process for producing a high strength porous polytetrafluoroethylene product having a coarse microstructure
    Patent number: 4482516
    Abstract: Porous polytetrafluoroethylene materials having high strength and coarse microstructure are produced by densifying the materials after removal of lubricant and then stretching. The term, "coarse," is used to indicate that the nodes are larger, the fibrils are longer, and the effective pore size is larger than conventional materials of the same matrix tensile strength. Densification can be achieved through the use of such devices as a densification die, a calender machine, or a press. This invention can be used to produce all kinds of shaped articles.
    Type: Grant
    Filed: September 10, 1982
    Date of Patent: November 13, 1984
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Jeffery B. Bowman, Daniel E. Hubis, James D. Lewis, Stephen C. Newman, Richard A. Staley