Patents by Inventor Jeffrey A. Martinson

Jeffrey A. Martinson 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).

  • Patent number: 5916743
    Abstract: A method combining the techniques of immunoaffinity separation and continuous flow centrifugal separation is provided for selective separation of a nucleated heterogeneous cell population from a heterogeneous cell mixture. The heterogeneous cell mixture is intimately contacted to promote binding thereto by particles having attached a substance that actively binds to a specific desired type of cell out of the cell mixture. The particles are selected so that the sedimentation velocity of the particle/cell conjugate differs sufficiently from those of other cells in the cell mixture to allow its separation by means of a continuous flow cell separator.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 29, 1999
    Assignee: Baxter International Inc.
    Inventors: William C. Lake, Richard Giesler, Dennis Van Epps, John R. Chapman, Jeffrey A. Martinson, Dale R. Ellis, Frederick Aono, Daniel F. Bischof
  • Patent number: 5811061
    Abstract: A method and apparatus for creating a leukocyte rich sample from a mixed population of blood cells. The method comprises the steps of: separating an amount of blood into layers that include a buffy coat layer having a mixed population of blood cells including plasma and red blood cells; providing a chamber having an opening for receiving a fluid; causing the buffy coat layer to enter the chamber; centrifuging the chamber to separate the buffy coat layer into at least a plasma containing layer, a leukocyte containing layer, and a red blood cell containing layer; and separating the leukocyte containing layer from the other layers in the chamber.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: September 22, 1998
    Assignee: Baxter International Inc.
    Inventors: Jeffrey Martinson, William Bratten, Li Ming Wang, John Chapman
  • Patent number: 5785869
    Abstract: A method and apparatus for creating a leukocyte rich sample from a mixed population of blood cells. The method comprises the steps of: separating an amount of blood into layers that include a buffy coat layer having a mixed population of blood cells including plasma and red blood cells; providing a chamber having an opening for receiving a fluid; causing the buffy coat layer to enter the chamber; centrifuging the chamber to separate the buffy coat layer into at least a plasma containing layer, a leukocyte containing layer, and a red blood cell containing layer; and separating the leukocyte containing layer from the other layers in the chamber.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: July 28, 1998
    Assignee: Baxter International Inc.
    Inventors: Jeffrey Martinson, William Bratten, Li Ming Wang, John Chapman
  • Patent number: 5686238
    Abstract: A method and apparatus for creating a leukocyte rich sample from a mixed population of blood cells. The method comprises the steps of: separating an amount of blood into layers that include a buffy coat layer having a mixed population of blood cells including plasma and red blood cells; providing a chamber having an opening for receiving a fluid; causing the buffy coat layer to enter the chamber; centrifuging the chamber to separate the buffy coat layer into at least a plasma containing layer, a leukocyte containing layer, and a red blood cell containing layer; and separating the leukocyte containing layer from the other layers in the chamber.
    Type: Grant
    Filed: December 9, 1993
    Date of Patent: November 11, 1997
    Assignee: Baxter International Inc.
    Inventors: Jeffrey Martinson, William Bratten, Li Ming Wang, John Chapman
  • Patent number: 5641622
    Abstract: A method combining the techniques of immunoaffinity separation and continuous flow centrifugal separation is provided for selective separation of a nucleated heterogeneous cell population from a heterogeneous cell mixture. The heterogeneous cell mixture is intimately contacted to promote binding thereto by particles having attached a substance that actively binds to a specific desired type of cell out of the cell mixture. The particles are selected so that the sedimentation velocity of the particle/cell conjugate differs sufficiently from those of other cells in the cell mixture to allow its separation by means of a continuous flow cell separator.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: June 24, 1997
    Assignee: Baxter International Inc.
    Inventors: William C. Lake, Richard Giesler, Dennis Van Epps, John R. Chapman, Jeffrey A. Martinson, Dale R. Ellis, Frederick Aono, Daniel F. Bischof
  • Patent number: 5614412
    Abstract: The present invention provides an apparatus for holding and carrying a plurality of flexible medical containers. The carrier has a rack having a plurality of plates positioned in parallel spaced relation, the plates defining a chamber between each pair of adjacent plates. A plurality of spacer assemblies each extend through the rack to connect the plates and to maintain their spaced relationship. The spacer assemblies are spaced along marginal edges of the rack to define two opposed end walls, a bottom, and an opening to the rack to allow access to each of the chambers. A flange extends from one of the plates and has a hole that allows the carrier to be suspended. The invention further provides for a system for transferring fluids and a method for mixing solutions using the carrier.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: March 25, 1997
    Inventors: Stephen L. Smith, James Bender, Jeffrey Martinson, Maureen Loudovaris, Orrin D. Mitsven, Jr., Kristen L. Unverzagt