Patents by Inventor Lucien R. Downing, Jr.

Lucien R. Downing, Jr. 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).

  • Patent number: 4067156
    Abstract: A panel for elevated access floors is disclosed in which the panel is formed of reinforced expanded lightweight concrete. The reinforcing is provided by a grid including two arrays of parallel reinforcing rods which extend parallel to the associated panel edges and perpendicular to the rods of the other grid. A frame is provided by the grid around the two arrays. The grid is located adjacent to the lower surface of the body and divides the body into a plurality of square zones. Located in each zone, excepting the zones at the corners, is a pyramid-shaped cavity which extends from a base at the lower surface of the panel upwardly at about to an apex spaced from the upper surface of the panel. The presence of the pyramid-shaped cavities does not materially reduce the strength of the panel when compared to a similar panel without such cavities, but reduces the weight of the panel and the material required to manufacture the panel.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: January 10, 1978
    Assignee: Donn Products, Inc.
    Inventor: Lucien R. Downing, Jr.