Patents Assigned to Martin Marietta Materials, IInc.
  • Insulated cargo containers
    Patent number: 7748172
    Abstract: The present invention relates to an insulated cargo container that may have, in combination, an interior panel covering a layer of thermal insulation that has an air-impermeable layer thereon. The thermal insulation is attached to the exterior panel of the container, which may have structural supports on its interior surface. In one embodiment, the insulated cargo container is an insulated railroad boxcar.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: July 6, 2010
    Assignee: Martin Marietta Materials, IInc.
    Inventors: Ronald J. Zupancich, Joseph A. Seiter