Patents by Inventor William Bratten

William Bratten 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: 6800432
    Abstract: A method and apparatus for inactivating viruses in a body fluid. A mixture including a therapeutically effective amount of methylene blue and an amount of a body fluid is formed in a container under sterile conditions and then the container is irradiated with a light field of a suitable intensity and wavelength for activating the methylene blue for a time sufficient to inactivate viruses in the mixture. The mixture is maintained in a substantially static state within the container.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: October 5, 2004
    Assignee: Baxter International Inc.
    Inventors: Ludwig Wolf, Jr., William Bratten, John Foley
  • Patent number: 6213334
    Abstract: A flexible, three-dimensional container is made by a prescribed vacuum-molding and heat sealing process. The container possesses a precise, defined geometry before and during use. The container is formed from first and second walls. The first wall has a planar area and a vacuum-molded cavity area drawn out of the plane of the planar area into a predefined three-dimensional geometry. A second wall overlies the first wall to close the cavity area and thereby forms an interior compartment. A thermal seal joins the two walls together. The seal is formed by heating the second wall and the first wall in the planar area, while assuring that the cavity area of the first wall is not subject to heating and possible deformation of its precise vacuum-molded geometry.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: April 10, 2001
    Assignee: Baxter International INC
    Inventors: Philip H. Coelho, Ludwig Wolf, Jr., David P. Fisher, Allen R. Wons, William Bratten
  • 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: 5527704
    Abstract: A method and apparatus for inactivating viruses in a body fluid. A mixture including a therapeutically effective amount of methylene blue and an amount of a body fluid is formed in a container under sterile conditions and then the container is irradiated with a light field of a suitable intensity and wavelength for activating the methylene blue for a time sufficient to inactivate viruses in the mixture. The mixture is maintained in a substantially static state within the container.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: June 18, 1996
    Assignee: Baxter International Inc.
    Inventors: Ludwig Wolf, Jr., William Bratten, John Foley