Patents by Inventor Barrett A. Johnson

Barrett A. Johnson 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).

  • Patent number: 4882067
    Abstract: The present invention relates to a process for removing contaminants, particularly heavy metal cations from industrial sludge and other industrial materials. The process comprises mixing the industrial wastes with specific fine clay or shale particles to form pellets which are heated at high temperature to form a nonhazardous sintered product. The product is then utilized in the manufacture of bricks, cinder blocks and other building materials and surfaces.
    Type: Grant
    Filed: April 27, 1988
    Date of Patent: November 21, 1989
    Assignee: Ceramic Bonding, Inc.
    Inventors: Barrett Johnson, Charles B. Rubenstein
  • Patent number: D252843
    Type: Grant
    Filed: June 16, 1978
    Date of Patent: September 11, 1979
    Assignee: Spacial Designs, Inc.
    Inventors: Barrett A. Johnson, Julianne Jones, Edward D. Lucey