Patents by Inventor Nathan P. Hagstrom

Nathan P. Hagstrom 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).

  • Publication number: 20250137555
    Abstract: A valve includes an orifice plate including at least one orifice surrounded by an orifice plate seal surface, a seal plate, and an actuator. The seal plate includes a seal boss having a seal boss surface that faces the orifice plate, and a pocket that overlays the at least one orifice. The pocket includes a recessed surface that is surrounded by the seal boss surface and is displaced from the seal boss surface along an axis. The actuator is configured to move the seal plate relative to the orifice plate along the axis to transition the valve between open and closed states. The seal boss surface engages the orifice plate seal surface, surrounds the at least one orifice, and blocks a flow of fluid through the at least one orifice when the valve is in the closed state.
    Type: Application
    Filed: December 26, 2024
    Publication date: May 1, 2025
    Inventors: Nathan P. Hagstrom, Matthew L. Gallagher, Thomas R. Chase
  • Publication number: 20250064498
    Abstract: An ablation catheter includes a tubular shaft having a proximal portion and a distal end and an electrode assembly extending from the distal end of the shaft. The electrode assembly includes a plurality of splines each having a spline proximal portion secured to the shaft, and an opposite spline distal portion. Each spline includes an electrically conductive support member partially disposed within an insulating member. The support member has a proximal end portion disposed within the insulating member and a distal end portion extending distally of the insulating member and terminating at a support member distal end. A plurality of sensing electrodes is disposed along each spline. A spline retainer mechanically engages with at least one of the proximal and distal portions of the splines.
    Type: Application
    Filed: August 20, 2024
    Publication date: February 27, 2025
    Inventors: James V. Kauphusman, Edward J. Maierhofer, Andrew L. DeKock, Nathan P. Hagstrom, Brian Soltis
  • Patent number: 12228222
    Abstract: A valve includes an orifice plate including at least one orifice surrounded by an orifice plate seal surface, a seal plate, and an actuator. The seal plate includes a seal boss having a seal boss surface that faces the orifice plate, and a pocket that overlays the at least one orifice. The pocket includes a recessed surface that is surrounded by the seal boss surface and is displaced from the seal boss surface along an axis. The actuator is configured to move the seal plate relative to the orifice plate along the axis to transition the valve between open and closed states. The seal boss surface engages the orifice plate seal surface, surrounds the at least one orifice, and blocks a flow of fluid through the at least one orifice when the valve is in the closed state.
    Type: Grant
    Filed: April 10, 2023
    Date of Patent: February 18, 2025
    Assignee: REGENTS OF THE UNIVERSITY OF MINNESOTA
    Inventors: Nathan P. Hagstrom, Matthew L. Gallagher, Thomas R. Chase
  • Publication number: 20240197394
    Abstract: A catheter for ablation of tissue through irreversible electroporation includes an electrode assembly comprising a flexible circuit having a distally located central flex circuit hub and a plurality of flex circuit branches extending proximally from the hub portion, each of the flex circuit branches defining, at least in part, an electrode assembly spline. The flexible circuit further includes a distal ablation electrode including an ablation electrode hub portion, and a plurality of radial segments integrally formed with the ablation electrode hub portion, each of the radial segments extending proximally along a portion of a respective one of the flex circuit branches and terminating in a proximal end, a plurality of proximal ablation electrodes, each of the proximal ablation electrodes located on a respective one of the flex circuit branches and having a distal end spaced from the proximal end of the adjacent radial segment of the distal ablation electrode.
    Type: Application
    Filed: November 15, 2023
    Publication date: June 20, 2024
    Inventors: Nathan P. Hagstrom, Brian Soltis, Edward J. Maierhofer, Andrew L. DeKock, Brendan E. Koop
  • Publication number: 20230323980
    Abstract: A valve includes an orifice plate including at least one orifice surrounded by an orifice plate seal surface, a seal plate, and an actuator. The seal plate includes a seal boss having a seal boss surface that faces the orifice plate, and a pocket that overlays the at least one orifice. The pocket includes a recessed surface that is surrounded by the seal boss surface and is displaced from the seal boss surface along an axis. The actuator is configured to move the seal plate relative to the orifice plate along the axis to transition the valve between open and closed states. The seal boss surface engages the orifice plate seal surface, surrounds the at least one orifice, and blocks a flow of fluid through the at least one orifice when the valve is in the closed state.
    Type: Application
    Filed: April 10, 2023
    Publication date: October 12, 2023
    Inventors: Nathan P. Hagstrom, Matthew L. Gallagher, Thomas R. Chase