Patents by Inventor William O. Roberts

William O. Roberts 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).

  • Stable mixtures of colloidal silica and a film-forming polymer
    Patent number: 5118727
    Abstract: Binder compositions are disclosed that include silica aquasols having silica that is metal-modified to include a monolayer or less of a metal such as aluminum, tin, zinc or lead, and deionized to a pH of 2,5-7.0 and a water soluble polymer such as poly(vinyl alcohol).An adhesive that includes a silica aquasol, an oxygen-moiety containing polymer, and clay, the surface of the silica being modified to include a metal, and the silica aquasol being deionized to a pH of 2.5 to 7.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: June 2, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William O. Roberts, Elizabeth R. Griffin
  • Method of protecting galvanized steel from corrosion
    Patent number: 5068134
    Abstract: This invention is directed to a process of protecting galvanized metal from white rust corrosion which comprises treating the galvanized metal, i.e., zinc-containing coating, at a temperature above about 125.degree. C. with at least one silica compound.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: November 26, 1991
    Assignee: Zaclon Corporation
    Inventors: James A. Cole, William O. Roberts, Joseph T. Turgeon