Patents by Inventor Donald P. Maddux

Donald P. Maddux 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).

  • Heated pavement sealant system
    Patent number: 8540455
    Abstract: A fluid pavement sealer composition includes a liquid phase having a sealant component and a fluid component, and at least about 25% by volume of finely divided metal particles suspended within the liquid phase. An electrically heated element contacts a pavement surface, with the solidified pavement sealer layer covering a selected area of the pavement surface including the electrically heated element. The solidified pavement sealant layer includes at least about 25% by volume of finely divided metal particles. The electrically heated element transfers heat to the pavement sealant layer and metal particles therein to maintain the selected area of pavement surface free of ice and snow.
    Type: Grant
    Filed: July 3, 2012
    Date of Patent: September 24, 2013
    Inventor: Donald P. Maddux