Patents by Inventor Richard L. Lawrence

Richard L. Lawrence 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).

  • Reinforced concrete deck structure for bridges and method of making same
    Patent number: 6578343
    Abstract: A reinforced concrete deck structure particularly adaptable for bridge spans is made up of superimposed layers of concrete with a corrugated metal pan therebetween along with a plurality of reinforcing bars which extend transversely of and through the corrugations. Individual, partially completed slabs are precast and are then placed on a bridge span and covered with a second layer.
    Type: Grant
    Filed: November 12, 2001
    Date of Patent: June 17, 2003
    Assignee: Pipe Service, Inc.
    Inventors: Fred Dumler, Richard L. Lawrence