Patents by Inventor Joseph Jay Hartvigsen

Joseph Jay Hartvigsen 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).

  • Joined solid oxide fuel cell stacks and method for fabricating same
    Patent number: 6368739
    Abstract: The invention comprises a solid oxide fuel cell system comprising at least two solid oxide fuel cell stacks and at least one extension member. Each solid oxide fuel cell stack includes a plurality of solid oxide fuel cells. Each cell is separated by an interconnect. The extension member joins at least one interconnect of one of the solid oxide fuel cell stacks with a corresponding interconnect of another of the solid oxide fuel cell stacks. The invention further includes a method of fabrication.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: April 9, 2002
    Assignee: Sofco
    Inventors: Lyman J. Frost, Singaravelu Elangovan, Joseph Jay Hartvigsen, Mark Timper, Dennis L. Larsen
  • Interconnect for solid oxide fuel cells
    Patent number: 6265095
    Abstract: An interconnect for solid oxide fuel cells comprises a separator having a cathode side and an anode side, and, at least one compliant sheet of material associated with one of the cathode side and the anode side of the separator. The anode side is associateable with an anode of a first adjacent cell. The cathode side is associateable with a cathode of a second adjacent cell. The at least one compliant sheet of material electrically and mechanically connects the respective anode or cathode with the respective side of the separator plate.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: July 24, 2001
    Assignee: Sofco
    Inventors: Joseph Jay Hartvigsen, Singaravelu Elangovan, Ashok Chandrashekhar Khandkar
  • Electrolyte for solid oxide fuel cells
    Patent number: 6224993
    Abstract: An electrolyte, and a process for its formation, for a solid oxide fuel cell comprising an electrolyte plate and a supporting member. The electrolyte plate includes an upper and a lower surface. The support member includes a plurality of non-intersecting support members which are positioned on at least one of the upper and the lower surfaces of the electrolyte plate.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: May 1, 2001
    Assignee: Sofco
    Inventors: Joseph Jay Hartvigsen, Singaravelu Elangovan, Robert Phillip Merrill, Ashok Chandrashekhar Khandkar
  • Via filled interconnect for solid oxide fuel cells
    Patent number: 6183897
    Abstract: An interconnect for a solid oxide fuel cell comprises a gas separator plate and at least one fill material. The gas separator plate includes at least one via extending therethrough. The at least one fill material is positioned within the at least one via, and operatively associated with at least one of a cathode or anode. The invention likewise includes a method for manufacturing the interconnect for a solid oxide fuel cell.
    Type: Grant
    Filed: September 16, 1998
    Date of Patent: February 6, 2001
    Assignee: Sofco
    Inventors: Joseph Jay Hartvigsen, Ashok Chandrashckhar Khandkar, Singaravelu Elangovan