Patents by Inventor David R. Puryear

David R. Puryear 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 making a filled asphalt composition
    Publication number: 20110165376
    Abstract: A process for making a composition of asphalt and filler in which a viscosity reducing additive is sprayed onto particles of shingle filler material to produce coated shingle filler material, the coated shingle filler material is heated, asphalt is heated, and the heated coated shingle filler material is mixed with the heated asphalt.
    Type: Application
    Filed: November 15, 2010
    Publication date: July 7, 2011
    Inventors: Robert H. Whitaker, Allen E. Smith, David R. Puryear
  • Mineral filler composition
    Patent number: 7833339
    Abstract: A composition comprised of asphalt and filler, wherein said filler is comprised of particles that comprise an inorganic core and a coating disposed on said core, and wherein at least about 60 weight percent of said particles are smaller than about 212 microns.
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: November 16, 2010
    Assignee: Franklin Industrial Minerals
    Inventors: Robert H. Whitaker, Allen E. Smith, David R. Puryear