Patents by Inventor Richard E. Schaefer

Richard E. Schaefer 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).

  • Polyvinyl butyral tackifier for vinyl chloride polymer compositions
    Patent number: 5380794
    Abstract: A vinyl composition tile formulation is disclosed which comprises polyvinyl chloride, inorganic fillers and from about 0.5% to about 4%, by weight of said formulation, polyvinyl butyral, as a tackifier.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: January 10, 1995
    Assignee: Monsanto Company
    Inventors: Richard E. Schaefer, James T. Renshaw, Peter M. Maino