Patents by Inventor Robert A. Marrott

Robert A. Marrott 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).

  • Grout applicator system
    Patent number: 6484782
    Abstract: A grout slurry pumping system, and a grout slurry control box and associated tools are described. Methods of using the pumping system and control box are also described. The pumping system and control box may be used separately or together. The pumping system maintains a grout slurry of desired consistency and can provide it through a hose to remote locations. The control box operates to apply grout to a work surface in desired quantities and in desired amounts according to a control valve.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: November 26, 2002
    Assignee: MudMaster, L.L.C.
    Inventors: Darrin Wayne Lewis, Robert A. Marrott
  • Grout pumps, control boxes and applicator tools, and methods for using the same
    Patent number: 6382922
    Abstract: A grout slurry pumping system, and a grout slurry control box and associated tools are described. Methods of using the pumping system and control box are also described. The pumping system and control box may be used separately or together. The pumping system maintains a grout slurry of desired consistency and can provide it through a hose to remote locations. The control box operates to apply grout to a work surface in desired quantities and in desired amounts according to a control valve.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: May 7, 2002
    Assignee: MudMaster, LLC
    Inventors: Darrin Wayne Lewis, Robert A. Marrott