Patents by Inventor Timothy E. Johnson

Timothy E. 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).

  • Aqueous heat-storage compositions containing fumed silicon dioxide and having prolonged heat-storage efficiencies
    Patent number: 4237023
    Abstract: Aqueous heat-storage compositions useful in space heating applications are disclosed which contain a phase-change material which absorbs and stores heat as it is heated above its phase-change temperature and releases stored heat as it is cooled below its phase-change temperature. These compositions include fumed silicon dioxide which acts as a stabilizing agent and provides dramatically prolonged heat-storage efficiency for these compositions as they undergo repetitive cycling through their phase-change temperature. Articles containing such compositions and methods of forming such compositions are additionally disclosed.
    Type: Grant
    Filed: March 20, 1979
    Date of Patent: December 2, 1980
    Assignees: Massachusetts Institute of Technology, Cabot Corporation
    Inventors: Timothy E. Johnson, John Giuffrida
  • Heat absorbing panel
    Patent number: 4178727
    Abstract: A heat absorbing panel is provided having an outer casing of resinous material intermixed with aggregate material. A central core is provided within the casing. The core includes substantial amounts of a phase change material having a melting point in the range of normal room temperature.
    Type: Grant
    Filed: February 1, 1978
    Date of Patent: December 18, 1979
    Assignee: Architectural Research Corporation
    Inventors: Richard C. Prusinski, Timothy E. Johnson