Patents by Inventor Donald W. Hegeman, III

Donald W. Hegeman, III 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).

  • Junction for shears sensitive biological fluid paths
    Patent number: 6293752
    Abstract: A biological fluid transport device comprises a cutwater at the junction of at least two blood flow paths. The cutwater is substantially straight, substantially vertical, or both. At least one of the fluid paths may be tubular, and in some embodiments all of the fluid paths are tubular. The shear sensitive fluid may be, without limitation, blood, blood-based combinations, cell culture media, cell suspensions, proteins, and microcapsule suspensions. The device may be part of an extracorporeal circuit (e.g., blood during heart-lung bypass procedures or blood processing), but it need not be. Preferred embodiments of the device include, without limitation, kinetic pumps, mass transfer devices, filters, reservoirs, and heat exchangers.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: September 25, 2001
    Inventors: Cynthia T. Clague, Frank D. Dorman, Robert C. Hamlen, Donald W. Hegeman, III, Timothy A. Miller, Joseph E. Poissant, Richard T. Stone, Michael P Sullivan
  • Junction for shear sensitive biological fluid paths
    Patent number: 5971023
    Abstract: A biological fluid transport device comprises a cutwater at the junction of at least two blood flow paths. The cutwater is substantially straight, substantially vertical, or both. At least one of the fluid paths may be tubular, and in some embodiments all of the fluid paths are tubular. The shear sensitive fluid may be, without limitation, blood, blood-based combinations, cell culture media, cell suspensions, proteins, and microcapsule suspensions. The device may be part of an extracorporeal circuit (e.g., blood during heart-lung bypass procedures or blood processing), but it need not be. Preferred embodiments of the device include, without limitation, kinetic pumps, mass transfer devices, filters, reservoirs, and heat exchangers.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: October 26, 1999
    Assignee: Medtronic, Inc.
    Inventors: Cynthia T. Clague, Frank D. Dorman, Robert C. Hamlen, Donald W. Hegeman, III, Timothy A. Miller, Joseph E. Poissant, Richard T. Stone, Michael P. Sullivan