Patents by Inventor Richard H. Harshbarger

Richard H. Harshbarger 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).

  • Primerless urethane adhesive compositions
    Patent number: 5606003
    Abstract: A two-component urethane adhesive is disclosed which requires no primer or pretreatment of the substrate. The adhesive in cured form has superior paint adhesion and can withstand high temperature bake cycles without substantial losses in adhesion to the substrate. The adhesive differs from prior adhesives in that essentially all of the high molecular weight polyols in the prepolymer component are the reaction product grafting reactions of acrylonitrile onto polypropylene polyols.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: February 25, 1997
    Assignee: GenCorp Inc.
    Inventors: Chia L. Wang, Arden E. Schmucker, Fred V. Sandels, Richard H. Harshbarger, Robert L. Spencer