Patents by Inventor Robert L. Dragon

Robert L. Dragon 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).

  • Electrolytic graining of aluminum with nitric and boric acids
    Patent number: 4416972
    Abstract: Aluminum is electrolytically grained in an aqueous solution of nitric and boric acids to provide a surface structure suitable for use as part of a lithographic printing plate. The electrolyte may also optionally contain hydrogen peroxide and/or aluminum nitrate.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: November 22, 1983
    Assignee: American Hoechst Corporation
    Inventors: John E. Walls, Robert L. Dragon, Thomas A. Dunder
  • Electrolytic graining of aluminum with hydrogen peroxide and nitric or hydrochloric acid
    Patent number: 4336113
    Abstract: Aluminum is electrolytically grained in an aqueous solution of nitric and/or hydrochloric acids plus hydrogen peroxide to provide a surface structure suitable for use as part of a lithographic printing plate. The electrolyte may also optionally contain aluminum nitrate and/or aluminum chloride.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: June 22, 1982
    Assignee: American Hoechst Corporation
    Inventors: John E. Walls, Robert L. Dragon, Thomas A. Dunder