Patents by Inventor David Tilghman Hill

David Tilghman Hill 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: 7793471
    Abstract: A floating floor assembled from an array of interconnected subunits, each of which includes a stone, ceramic or porcelain tile and a one-piece polymeric plastic substrate to which the stone, ceramic, or porcelain tile is bonded. Each substrate is injection molded from certain polyolefin polymers and incorporates the interlock structure and certain other features of the modular sports tiles of U.S. Pat. No. 4,930,286. The substrates of the present invention, however, differ in that each substrate incorporates a vertical stabilization system, the plastic support grid is formed by three sets of mutually intersecting walls, with each set being angularly offset from the other two by 120 degrees, and each substrate is sized to precisely fit a stone, ceramic or porcelain tile, which is accurately positioned by tile locator tabs on a pair of intersecting sides of the substrate.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: September 14, 2010
    Inventor: David Tilghman Hill
  • Publication number: 20090139160
    Abstract: A floating floor assembled from an array of interconnected subunits, each of which includes a stone, ceramic or porcelain tile and a one-piece polymeric plastic substrate to which the stone, ceramic, or porcelain tile is bonded. Each substrate is injection molded from certain polyolefin polymers and incorporates the interlock structure and certain other features of the modular sports tiles of U.S. Pat. No. 4,930,286. The substrates of the present invention, however, differ in that each substrate incorporates a vertical stabilization system, the plastic support grid is formed by three sets of mutually intersecting walls, with each set being angularly offset from the other two by 120 degrees, and each substrate is sized to precisely fit a stone, ceramic or porcelain tile, which is accurately positioned by tile locator tabs on a pair of intersecting sides of the substrate.
    Type: Application
    Filed: August 8, 2008
    Publication date: June 4, 2009
    Inventor: David Tilghman Hill
  • Publication number: 20090139159
    Abstract: A floating floor assembled from an array of interconnected subunits, each of which includes a stone, ceramic or porcelain tile and a one-piece polymeric plastic substrate to which the stone, ceramic, or porcelain tile is bonded. Each substrate is injection molded from certain polyolefin polymers and incorporates the interlock structure and certain other features of the modular sports tiles of U.S. Pat. No. 4,930,286. The substrates of the present invention, however, differ in that the plastic support grid is formed by three sets of mutually intersecting walls, with each set being angularly offset from the other two by 120 degrees, and each substrate is sized to precisely fit a stone, ceramic or porcelain tile, which is accurately positioned by tile locator tabs on a pair of intersecting sides of the substrate.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 4, 2009
    Inventor: David Tilghman Hill