Patents by Inventor Yufu Li

Yufu Li 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).

  • Polymeric stent having modified molecular structures in the flexible connections
    Publication number: 20070135902
    Abstract: A biocompatible material may be configured into any number of implantable medical devices including intraluminal stents. Polymeric materials may be utilized to fabricate any of these devices, including stents. The stents may be balloon expandable or self-expanding. By preferential mechanical deformation of the polymer, the polymer chains may be oriented to achieve certain desirable performance characteristics.
    Type: Application
    Filed: May 25, 2006
    Publication date: June 14, 2007
    Inventors: Robert Burgermeister, Joseph Contiliano, Vipul Dave, Yufu Li, Pallassana Narayanan, David Overaker, Qiang Zhang
  • Polymeric stent having modified molecular structures in selected regions of the hoops and method for increasing elongation at break
    Publication number: 20070132155
    Abstract: A biocompatible material may be configured into any number of implantable medical devices including intraluminal stents. Polymeric materials may be utilized to fabricate any of these devices, including stents. The stents may be balloon expandable or self-expanding. By preferential mechanical deformation of the polymer, the polymer chains may be oriented to achieve certain desirable performance characteristics.
    Type: Application
    Filed: May 25, 2006
    Publication date: June 14, 2007
    Inventors: Robert Burgermeister, Joseph Contiliano, Vipul Dave, Yufu Li, Pallassana Narayanan, David Overaker, Qiang Zhang
  • Polymeric stent having modified molecular structures in selected regions of the hoops and method for making the same
    Publication number: 20070132156
    Abstract: A biocompatible material may be configured into any number of implantable medical devices including intraluminal stents. Polymeric materials may be utilized to fabricate any of these devices, including stents. The stents may be balloon expandable or self-expanding. By preferential mechanical deformation of the polymer, the polymer chains may be oriented to achieve certain desirable performance characteristics.
    Type: Application
    Filed: May 25, 2006
    Publication date: June 14, 2007
    Inventors: Robert Burgermeister, Joseph Contiliano, Vipul Dave, Yufu Li, Pallassana Narayanan, David Overaker, Qiang Zhang
  • Devices using a medium having a high heat transfer rate
    Patent number: 7220365
    Abstract: Disclosed is a heat transfer medium having high heat transfer rate, being useful in even wider fields, simple in structure, easy to made, environmentally sound, and capable of rapidly conducting heat and preserving heat in a highly efficient manner. Further disclosed are a heat transfer surface and a heat transfer element utilizing the heat transfer medium. Further disclosed are applications of the heat transfer element.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: May 22, 2007
    Assignee: New Qu Energy Ltd.
    Inventors: YuZhi Qu, ZhiPeng Qu, Jason Chao, YuFu Li, Peng Chen, JunHua Yan, Hong Yuan Yang, Qi Feng Wei
  • Biodegradable stent
    Publication number: 20070106371
    Abstract: A biodegradable stent for implantation into a lumen in a human body. The stent in one embodiment is made from a biodegradable fiber having an inner core and an outer layer. The outer layer is a blend of two polymer components. The inner core has a first degradation rate, and the outer layer has a second degradation rate. The second degradation rate is slower than the first degradation rate. The fiber softens in vivo such that the stent is readily passed from the lumen as a softened fragment or filament after a predetermined period of time through normal flow of body fluids passing through the lumen.
    Type: Application
    Filed: December 22, 2006
    Publication date: May 10, 2007
    Inventors: Arindam Datta, Shawn Huxel, Dennis Jamiolkowski, Yufu Li
  • Method of performing anterior cruciate ligament reconstruction using biodegradable interference screw
    Publication number: 20070093895
    Abstract: A method of replacing an ACL with a graft. The method provides for the drilling bone tunnels in a femur and a tibia. A replacement graft is provided having first and second ends. A biodegradable composite screw is provided. The screw is made from a biodegradable polymer and a bioceramic or a bioglass. At least one end of the graft is secured in a bone tunnel using the biodegradable composite screw.
    Type: Application
    Filed: November 27, 2006
    Publication date: April 26, 2007
    Inventors: Lisa Donnelly, Yufu Li, Joan Sullivan, Gregory Whittaker, J. Yuan
  • Biodegradable stent
    Patent number: 7169187
    Abstract: The present invention is directed to stents that are formed into a helical structure having a plurality of coils, a longitudinal axis, an internal longitudinal passage, a distal section and a proximal section having different diameters; where the structure is made from a fiber having a cross-section and including an inner core having an exterior surface made from a biodegradable polymer having a first degradation rate and an outer section made from a blend of a first biodegradable polymer component and a second biodegradable polymer component covering the exterior surface of the inner core and having a second degradation rate; where the second degradation rate is lower than the first degradation rate.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: January 30, 2007
    Assignee: Ethicon, Inc.
    Inventors: Arindam Datta, Shawn Thayer Huxel, Dennis D. Jamiolkowski, Yufu Li, Kevor S. TenHuisen
  • Biodegradable stent
    Patent number: 7166134
    Abstract: A biodegradable stent for implantation into a lumen in a human body. The stent in one embodiment is made from a biodegradable fiber having an inner core and an outer layer. The outer layer is a blend of two polymer components. The inner core has a first degradation rate, and the outer layer has a second degradation rate. The second degradation rate is slower than the first degradation rate. The fiber softens in vivo such that the stent is readily passed from the lumen as a softened fragment or filament after a pre-determined period of time through normal flow of body fluids passing through the lumen.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: January 23, 2007
    Assignee: Ethicon, Inc.
    Inventors: Arindam Datta, Shawn Thayer Huxel, Dennis D. Jamiolkowski, Yufu Li
  • Biodegradable stent
    Patent number: 7163562
    Abstract: A biodegradable stent for implantation into a lumen in a human body. The stent in one embodiment is made from a biodegradable fiber having an inner core and an outer layer. The outer layer is a blend of two polymer components. The inner core has a first degradation rate, and the outer layer has a second degradation rate. The second degradation rate is slower than the first degradation rate. The fiber softens in vivo such that the stent is readily passed from the lumen as a softened fragment or filament after a pre-determined period of time through normal flow of body fluids passing through the lumen.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: January 16, 2007
    Assignee: Ethicon, Inc.
    Inventors: Arindam Datta, Shawn Thayer Huxel, Dennis D. Jamiolkowski, Yufu Li
  • Medical fixation devices with improved torsional drive head
    Publication number: 20070010820
    Abstract: The present invention provides a fixation device that includes an elongate shank defining a longitudinal axis and having at least one engaging member for applying the fixation device within tissue and securing the fixation device in the tissue once implanted formed thereon, and a drive head having a proximal end, a distal end and a radial cross-sectional geometry, where the drive head is mated to the elongate shank, and includes at least one anti-rotational member integral therewith, Fixation device kits utilizing the fixation device, and methods of fixation in tissue are also provided.
    Type: Application
    Filed: June 29, 2005
    Publication date: January 11, 2007
    Inventors: Joseph Contiliano, Yufu Li, Zhigang Li
  • Tissue repair device and fabrication thereof
    Publication number: 20070001341
    Abstract: A device for use in tissue repair procedures, a surgical tissue repair procedure, and a method of making the device. Specifically, the device is an assembly of a cannulated anchor member with a cord passed through it, and a stopper mounted to an end of the cord to prevent the cord from passing back through the anchor member.
    Type: Application
    Filed: June 23, 2005
    Publication date: January 4, 2007
    Inventors: Zhigang Li, Kevin Cooper, Yufu Li, Raymond Shissias, Qiang Zhang
  • Active embolization device
    Publication number: 20070001346
    Abstract: A vascular embolization device comprises an elongated coil having a lumen, said coil and lumen being at least partially embedded in an elongated foam member comprising a flexible, biodegradable, water insoluble, open, interconnecting-cell foam material having embolic characteristics, and capable of allowing cell proliferation into the open cell foam interior. A manufacturing method is disclosed.
    Type: Application
    Filed: June 30, 2005
    Publication date: January 4, 2007
    Inventors: Murty Vyakarnam, Hiep Do, Yufu Li, Chin-Feng Yi, Yi
  • Suture anchor with improved torsional drive head
    Publication number: 20070005069
    Abstract: The present invention provides a suture anchor that includes an elongate shank defining a longitudinal axis and having at least one engaging member for applying the suture anchor within the bone and securing the suture anchor in the bone once implanted formed thereon, and a drive head having a proximal end, a distal end and a radial cross-sectional geometry, where the drive head is mated to the elongate shank, includes at least one suture attachment element formed in a portion thereof and at least one anti-rotational member integral therewith, suture anchor kits utilizing the suture anchors and methods of attaching bone to gone.
    Type: Application
    Filed: June 29, 2005
    Publication date: January 4, 2007
    Inventors: Joseph Contiliano, Yufu Li, Zhigang Li, Nathan Cauldwell
  • Tissue repair device and fabrication thereof
    Publication number: 20060293675
    Abstract: A device for use in tissue repair procedures, a surgical tissue repair procedure, and a method of making the device. Specifically, the device is an assembly of a cannulated anchor member with a cord passed through it, and a stopper mounted to an end of the cord to prevent the cord from passing back through the anchor member.
    Type: Application
    Filed: June 23, 2005
    Publication date: December 28, 2006
    Inventors: Zhigang Li, Kevin Cooper, Yufu Li, Raymond Shissias, Qiang Zhang
  • Threaded cable anchor
    Patent number: 7022129
    Abstract: A bone anchor for securing sutures or cables within a hole opening in a bone includes a screw element and a washer, which is separate from and independent of the screw element. The end of the cable to be secured within the bone hole opening is knotted or otherwise secured to the washer, thereby isolating the cable from the twisting of the screw element during insertion of the anchoring device into the hole opening in the bone.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: April 4, 2006
    Assignee: Ethicon, Inc.
    Inventors: David W. Overaker, Yufu Li, Ronald W. Marsh, Kevin L. Cooper
  • Reinforced implantable medical devices
    Patent number: 7012106
    Abstract: The present invention is directed to reinforced, biocompatible, biodegradable compositions suitable for use in implantable medical devices and medical devices made at least in part from such compositions, where the compositions include a biocompatible, biodegradable polymer; a biocompatible, biodegradable wax; and greater than about 30 weight percent of an inorganic filler material.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: March 14, 2006
    Assignee: Ethicon, Inc.
    Inventors: Jenny J. Yuan, Joseph H. Contiliano, Yufu Li, Zhigang Li, Mark B. Roller, Murty N. Vyakarnam
  • Removable stent for body lumens
    Patent number: 6981987
    Abstract: A removable stent for implantation into a lumen in a human body. The stent is made from a soft, flexible fiber having an outer surface. An outer bioabsorbable/degradable coating is applied to the outer surface of the filament causing it to become rigid. The coating softens in vivo through absorption and/or degradation such that the stent is readily passed or removed from the lumen as a softened filament after a pre-determined period of time through normal flow of body fluids passing through the lumen or by manual removal.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: January 3, 2006
    Assignee: Ethicon, Inc.
    Inventors: Shawn Thayer Huxel, Arindam Datta, Yufu Li, Dennis D. Jamiolkowski, Emil Richard Skula
  • Method of making active embolic coil
    Publication number: 20050261727
    Abstract: A polymeric coating is applied to at least one embolic coil carried in a fixture, at least a portion of said embolic coil being generally vertical and straight. The coil is carried in the fixture during the processing, and may remain in the fixture if desired for further steps of processing.
    Type: Application
    Filed: April 6, 2005
    Publication date: November 24, 2005
    Inventors: Richard Davis, Yufu Li, Zhigang Li, Juan Lorenzo, Murty Vyakamam
  • Biodegradable stent
    Publication number: 20050177246
    Abstract: The present invention is directed to stents that are formed into a helical structure having a plurality of coils, a longitudinal axis, an internal longitudinal passage, a distal section and a proximal section having different diameters; where the structure is made from a fiber having a cross-section and including an inner core having an exterior surface made from a biodegradable polymer having a first degradation rate and an outer section made from a blend of a first biodegradable polymer component and a second biodegradable polymer component covering the exterior surface of the inner core and having a second degradation rate; where the second degradation rate is lower than the first degradation rate.
    Type: Application
    Filed: June 24, 2003
    Publication date: August 11, 2005
    Inventors: Arindam Datta, Shawn Huxel, Dennis Jamiolkowski, Yufu Li, Kevor TenHuisen
  • Method of performing anterior cruciate ligament reconstruction using biodegradable interference screw
    Publication number: 20050070905
    Abstract: A method of replacing an ACL with a graft. The method provides for the drilling bone tunnels in a femur and a tibia. A replacement graft is provided having first and second ends. A biodegradable composite screw is provided. The screw is made from a biodegradable polymer and a bioceramic or a bioglass. At least one end of the graft is secured in a bone tunnel using the biodegradable composite screw.
    Type: Application
    Filed: September 29, 2003
    Publication date: March 31, 2005
    Inventors: Lisa Donnelly, Yufu Li, Joan Sullivan, Gregory Whittaker, J. Yuan