Patents by Inventor Philip Litwak

Philip Litwak 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: 7122151
    Abstract: A combination mass transfer and pump apparatus, which in a single step actively mixes a first mass and a second mass and simultaneously pumps one of the first mass and the second mass through the apparatus. The combination mass transfer and pump apparatus substantially comprises a housing and at least one distributor element having a plurality of selectively fluid-permeable membrane elements wherein the at least one distributor element is agitated within the second mass such that the first mass diffuses across the selectively fluid-permeable membrane elements, mixing with the second mass, and in the same step the second mass is pumped through the housing.
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: October 17, 2006
    Assignee: University of Pittsburgh
    Inventors: Gary D. Reeder, Mark J. Gartner, Harvey S. Borovetz, Philip Litwak
  • Patent number: 6929777
    Abstract: A fluid pump used to circulate and oxygenate blood, the fluid pump having an electrical or pneumatic motor having a motor shaft, a gas exchange assembly connected to one end of the motor shaft, and a hollow venturi that defines a venturi inlet opening, a venturi exhaust opening, and a venturi suction opening, wherein the venturi suction opening is fluidly connected to the gas exchange assembly to aspirate carbon dioxide rich gas.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: August 16, 2005
    Assignee: Ension, Inc.
    Inventors: Philip Litwak, Mark J. Gartner
  • Publication number: 20040219061
    Abstract: A combination mass transfer and pump apparatus, which in a single step actively mixes a first mass and a second mass and simultaneously pumps one of the first mass and the second mass through the apparatus. The combination mass transfer and pump apparatus substantially comprises a housing and at least one distributor element having a plurality of selectively fluid-permeable membrane elements wherein the at least one distributor element is agitated within the second mass such that the first mass diffuses across the selectively fluid-permeable membrane elements, mixing with the second mass, and in the same step the second mass is pumped through the housing.
    Type: Application
    Filed: April 19, 2004
    Publication date: November 4, 2004
    Applicant: University of Pittsburgh
    Inventors: Gary D. Reeder, Mark J. Gartner, Harvey S. Borovetz, Philip Litwak
  • Patent number: 6723284
    Abstract: A combination mass transfer and pump apparatus, which in a single step actively mixes a first mass and a second mass and simultaneously pumps one of the first mass and the second mass through the apparatus. The combination mass transfer and pump apparatus substantially comprises a housing and at least one distributor element having a plurality of selectively fluid-permeable membrane elements wherein the at least one distributor element is agitated within the second mass such that the first mass diffuses across the selectively fluid-permeable membrane elements, mixing with the second mass, and in the same step the second mass is pumped through the housing.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: April 20, 2004
    Assignee: University of Pittsburgh
    Inventors: Gary D. Reeder, Mark J. Gartner, Harvey S. Borovetz, Philip Litwak
  • Patent number: 6348175
    Abstract: A blood membrane oxygenator having a housing defining a blood flow path, a rotor hub in the form of a double lumen shaft, and a plurality of distributor disks each having a plurality of hollow fibers which extend across the housing blood flow path. The plurality of distributor disks rotate within the housing to mix the blood resulting in three-dimensional mixing, disruption of the blood boundary layer and efficient blood oxygenation.
    Type: Grant
    Filed: October 5, 1999
    Date of Patent: February 19, 2002
    Assignee: University of Pittsburgh
    Inventors: Harvey S. Borovetz, Philip Litwak, Mark Gartner, Gary D. Reeder, Patricia Sawzik
  • Patent number: 6217826
    Abstract: A combination mass transfer and pump apparatus, which in a single step actively mixes a first mass and a second mass and simultaneously pumps one of the first mass and the second mass through the apparatus. The combination mass transfer and pump apparatus substantially comprises a housing and at least one distributor element having a plurality of selectively fluid-permeable membrane elements wherein the at least one distributor element is agitated within the second mass such that the first mass diffuses across the selectively fluid-permeable membrane elements, mixing with the second mass, and in the same step the second mass is pumped through the housing.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: April 17, 2001
    Assignee: University of Pittsburgh
    Inventors: Gary D. Reeder, Mark J. Gartner, Harvey S. Borovetz, Philip Litwak
  • Patent number: 6106776
    Abstract: A blood membrane oxygenator has a housing defining a blood flow path, a rotor hub in the form of a double lumen shaft, and a plurality of distributor disks each having a plurality of hollow fibers which extend across the housing blood flow path. The plurality of distributor disks rotate within the housing to mix the blood resulting in three-dimensional mixing, disruption of the blood boundary layer and efficient blood oxygenation.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: August 22, 2000
    Assignee: University of Pittsburgh
    Inventors: Harvey S. Borovetz, Philip Litwak, Mark Gartner, Gary D. Reeder, Patricia Sawzik
  • Patent number: 5984857
    Abstract: This invention provides a simple skeletal muscle linear pull energy convertor which can harness the maximal amount of muscle power for a wide variety of implantable medical devices, including the full range of circulatory support devices. The muscle powered system provides completely implantable circulatory support as an alternative to cardiac transplantation, with a quality of life relatively free from external batteries, transcutaneous energy transmission and other electromechanical hardware.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: November 16, 1999
    Assignee: Thoratec Laboratories Corporation
    Inventors: Keith Evan Buck, David John Farrar, Robert Joseph Harvey, Philip Litwak, John Robert Rueff
  • Patent number: 5701919
    Abstract: This invention provides a simple skeletal muscle linear pull energy convertor which can harness the maximal amount of muscle power for a wide variety of implantable medical devices, including the full range of circulatory support devices. The muscle powered system provides completely implantable circulatory support as an alternative to cardiac transplantation, with a quality of life relatively free from external batteries, transcutaneous energy transmission and other electromechanical hardware.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 30, 1997
    Assignee: Thoratec Laboratories Corporation
    Inventors: Keith Evan Buck, David John Farrar, Robert Joseph Harvey, Philip Litwak, John Robert Rueff
  • Patent number: 5653676
    Abstract: This invention provides a simple skeletal muscle linear pull energy convertor which can harness the maximal amount of muscle power for a wide variety of implantable medical devices, including the full range of circulatory support devices. The muscle powered system provides completely implantable circulatory support as an alternative to cardiac transplantation, with a quality of life relatively free from external batteries, transcutaneous energy transmission and other electromechanical hardware.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 5, 1997
    Assignee: Thoratec Laboratories Corporation
    Inventors: Keith Evan Buck, David John Farrar, Robert Joseph Harvey, Philip Litwak, John Robert Rueff
  • Patent number: 5344385
    Abstract: This invention provides a simple skeletal muscle linear pull energy convertor which can harness the maximal amount of muscle power for a wide variety of implantable medical devices, including the full range of circulatory support devices. The muscle powered system provides completely implantable circulatory support as an alternative to cardiac transplantation, with a quality of life relatively free from external batteries, transcutaneous energy transmission and other electromechanical hardware.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: September 6, 1994
    Assignee: Thoratec Laboratories Corporation
    Inventors: Keith E. Buck, David J. Farrar, Robert J. Harvey, Philip Litwak, John R. Rueff
  • Patent number: 4430998
    Abstract: A closure band of water-vapor permeable, flexible, elastic plastic spans a cut in the flesh and holds the cut closed. Flesh-engaging penetrants such as hooks are partly embedded in or are part of the band and engage the flesh either side of the cut. Adhesive on the band also contacts the flesh and helps hold the penetrants embedded. A tear strip overlying openings through the band, when removed, allows inspection of the cut.
    Type: Grant
    Filed: June 1, 1982
    Date of Patent: February 14, 1984
    Assignee: Thoratec Laboratories Corporation
    Inventors: Robert J. Harvey, Philip Litwak, William A. Ribich, John M. Dubowik