Patents by Inventor Fred R. Davis

Fred R. Davis 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).

  • Method of modifying asphalt with thermoplastic polymers, ground rubber and composition produced
    Patent number: 4485201
    Abstract: A thermoplastic elastomer asphalt composition is a blend of 100 parts by weight of asphalt, from about 12 to about 20 parts by weight of ground rubber containing primarily SBR, natural rubber, or polybutadiene, and from about 2 to about 8 parts by weight of a styrene-butadiene block copolymer. A block copolymer has at least two styrene blocks, each having a molecular weight of from about 5,000 to about 20,000 and may be linear or branched. The blend has good low and high temperature cohesive and adhesive properties, good low and high temperature flexibility, and good elasticity. The composition can be used as a crack sealer, a concrete joint sealer filler, an overlay sealant for construction materials, and the like.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: November 27, 1984
    Assignee: Midwest Elastomers, Inc.
    Inventor: Fred R. Davis
  • Flame retardant rubber flooring composition
    Patent number: 4131592
    Abstract: A flame retardant synthetic rubber composition for use as a flooring material including a high bound styrene resin polymer and known flooring compounding ingredients. A hot emulsion SBR polymer, antimony oxide, a chlorinated paraffin hydrocarbon and hydrated alumina are present and the composition also includes a high flash point naphthenic oil.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: December 26, 1978
    Assignee: The R.C.A. Rubber Company
    Inventor: Fred R. Davis