Patents by Inventor Stephen Edward Bowman

Stephen Edward Bowman 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).

  • Composite joint filler seal material for joints in precast concrete structures
    Patent number: 9034454
    Abstract: An apparatus for filling joints in precast concrete structures includes a core that has exceptionally low creep and conforms to ASTM D 1752 made of controlled particle size composites of recycled cellular rubber and plastic materials in the form of a rectangular slab. Holes are drilled through a central area and countersink recesses are formed around the holes. An outer coating of a thermoplastic polyurethane/polyurea elastomer system of a thickness of 0.075 inch covers the slab and countersink recesses. The coated core is abrasion and UV resistant while having the creep characteristics needed to make a dam expansion joint filler.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: May 19, 2015
    Assignee: Southern Rubber Company, Inc.
    Inventor: Stephen Edward Bowman