Patents by Inventor Ray I. Roby

Ray I. Roby 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).

  • Adhesive composition
    Patent number: 4045395
    Abstract: A water impervious surfacing composition which includes cement and sand and a mixture of an aqueous coal tar emulsion and an aqueous polyvinyl acetate emulsion.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: August 30, 1977
    Assignee: Roby's Enterprises, Inc.
    Inventor: Ray I. Roby