Patents by Inventor David Elling

David Elling 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).

  • Electrically conductive polymer concrete coatings
    Patent number: 4908157
    Abstract: A sprayable electrically conductive polymer concrete coating for vertical d overhead applications is described. The coating is permeable yet has low electrical resistivity (<10 ohm-cm), good bond strength to concrete substrates, and good weatherability. A preferred formulation contains about 60 wt % calcined coke breeze, 40 wt % vinyl ester with 3.5 wt % modified bentonite clay. Such formulations apply evenly and provide enough rigidity for vertical or overhead structures so there is no drip or sag.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: March 13, 1990
    Assignee: The United States of America as represented by the Department of Energy
    Inventors: Jack J. Fontana, David Elling, Walter Reams