Patents by Inventor Judith B. Esposito

Judith B. Esposito 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).

  • Chemical cleaning method for steam generators utilizing pressure pulsing
    Patent number: 5154197
    Abstract: An improved method for removing sludge and corrosion products from the interior of a heat exchanger vessel, such as a nuclear steam generator, which comprises the steps of generating a series of pressure pulses within a liquid chelate-containing chemical cleaning agent after the agent has been introduced into the interior of the vessel to create shock waves in the liquid for dislodging, dissolving and fluidizing sludge and corrosion products. The liquid chemical cleaning agent is removed from the vessel after only about 10 to 70 percent of what would have been its normal residence time without the pressure pulses.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: October 13, 1992
    Assignee: Westinghouse Electric Corp.
    Inventors: Gregg D. Auld, Allen J. Baum, Judith B. Esposito, William J. Stenger
  • Inhibiting stress corrosion cracking in the primary coolant circuit of a nuclear reactor
    Patent number: 5108697
    Abstract: A primary coolant circuit for cooling a nuclear reactor has wetted mechanically stressed nickel base alloy components such as Alloy 600 tubes in steam generators having oxidized surfaces comprising 1-10 w/o zinc, which tubes are inhibited against primary water stress corrosion cracking. The crack initiation times may be delayed by a factor of two in pressurized water nuclear reactors.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: April 28, 1992
    Assignee: Westinghouse Electric Corp.
    Inventors: John N. Esposito, Judith B. Esposito, Fredric W. Pement