Patents by Inventor David Roger Butts

David Roger Butts 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).

  • Use of partial precast panels for construction of concrete walls and shells
    Patent number: 7162844
    Abstract: A precast panel for building reinforced concrete walls has a metal liner that forms a front surface of the panel. A concrete mass is disposed behind the liner. The panel has reinforcement structure within the concrete mass that can be used to provide continuity of reinforcement between adjacent panels. Edges on the concrete mass are recessed, facilitating the connection of a splice end on a reinforcing bar with a splice end on an adjacent panel. The liner, reinforcement structure, and concrete mass form a composite steel-concrete structure.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: January 16, 2007
    Assignee: Chicago Bridge & Iron Company
    Inventors: Donald MacKenzie Morrison, J. Ricky Simmons, David Roger Butts