Patents by Inventor John Frederick Schardt

John Frederick Schardt 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).

  • Cladding for use in nuclear reactors having improved resistance to stress corrosion cracking and corrosion
    Patent number: 6542566
    Abstract: An improved fuel element for use in a nuclear reactor comprised of a central core of nuclear material, which is surrounded by a composite cladding. The cladding has an outer metallic tubular portion comprised of well-known cladding alloys used for such purposes. Metallurgically bonded to the outer metallic tubular portion is a commercially pure zirconium microalloyed with a controlled quantity of iron. The zirconium microalloyed with iron produced an inner metallic barrier having a beneficial balance between stress corrosion crack resistance and corrosion resistance while retaining other beneficial properties of pure zirconium, such as ductility.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: April 1, 2003
    Inventors: Ronald Bert Adamson, Daniel Reese Lutz, Mickey Orville Marlowe, John Frederick Schardt, Cedric David Williams
  • Cladding for use in nuclear reactors having improved resistance to stress corrosion cracking and corrosion
    Publication number: 20010007584
    Abstract: An improved fuel element for use in a nuclear reactor comprised of a central core of nuclear material, which is surrounded by a composite cladding. The cladding has an outer metallic tubular portion comprised of well-known cladding alloys used for such purposes. Metallurgically bonded to the outer metallic tubular portion is a commercially pure zirconium microalloyed with a controlled quantity of iron. The zirconium microalloyed with iron produced an inner metallic barrier having a beneficial balance between stress corrosion crack resistance and corrosion resistance while retaining other beneficial properties of pure zirconium, such as ductility.
    Type: Application
    Filed: March 7, 2001
    Publication date: July 12, 2001
    Inventors: Ronald Bert Adamson, Daniel Reese Lutz, Mickey Orville Marlowe, John Frederick Schardt, Cedric David Williams
  • Cladding for use in nuclear reactors having improved resistance to stress corrosion cracking and corrosion
    Patent number: 6243433
    Abstract: An improved fuel element for use in a nuclear reactor comprised of a central core of nuclear material, which is surrounded by a composite cladding. The cladding has an outer metallic tubular portion comprised of well-known cladding alloys used for such purposes. Metallurgically bonded to the outer metallic tubular portion is a commercially pure zirconium microalloyed with a controlled quantity of iron. The zirconium microalloyed with iron produced an inner metallic barrier having a beneficial balance between stress corrosion crack resistance and corrosion resistance while retaining other beneficial properties of pure zirconium, such as ductility.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: June 5, 2001
    Assignee: General Electic Co.
    Inventors: Ronald Bert Adamson, Daniel Reese Lutz, Mickey Orville Marlowe, John Frederick Schardt, Cedric David Williams