Patents by Inventor William W. Heim

William W. Heim 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).

  • Method for manufacturing a carpet having a secondary backing substantially impervious to liquids and the resultant carpet
    Patent number: 5558916
    Abstract: This invention relates to methods for making a carpet having a secondary backing which is substantially impervious to liquids. The methods involve applying a repellent finish onto the secondary backing material and drying the finish. The finish may be applied as foam to the secondary backing, against the force of gravity, by means of a press roll. This invention also includes the resultant carpets prepared from these methods.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: September 24, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William W. Heim, James K. Hendrix, Joyce M. Materniak, Peter M. Murphy, Neil A. Panzier, Yashavant V. Vinod