Patents by Inventor Yunbing Wang

Yunbing Wang 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).

  • Copolymer-Bioceramic Composite Implantable Medical Devices
    Publication number: 20110015726
    Abstract: Methods and devices relating to polymer-bioceramic composite implantable medical devices are disclosed. The bioceramic comprises calcium sulfate.
    Type: Application
    Filed: August 2, 2010
    Publication date: January 20, 2011
    Applicant: Advanced Cardiovascular Systems, Inc.
    Inventors: Yunbing Wang, David C. Gale
  • Methods To Increase Fracture Resistance Of A Drug-Eluting Medical Device
    Publication number: 20100323091
    Abstract: Methods for increasing the fracture resistance of a polymer stent's drug-polymer coating and scaffolding including applying a coating and crimping using techniques that increase the resistance to fracture in the coating layer and scaffolding and scaffolding.
    Type: Application
    Filed: June 23, 2009
    Publication date: December 23, 2010
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Dan Castro, Yunbing Wang
  • Polymer blend-bioceramic composite implantable medical devices
    Patent number: 7842737
    Abstract: Methods and devices relating to polymer blend/bioceramic composite implantable medical devices are disclosed.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: November 30, 2010
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, David C. Gale
  • Fabricating An Implantable Medical Device From An Amorphous Or Very Low Crystallinity Polymer Construct
    Publication number: 20100252965
    Abstract: Methods of fabricating a polymeric implantable device with improved fracture toughness through annealing, nucleating agents, or both are disclosed herein. A polymeric construct that is completely amorphous or that has a very low crystallinity is annealed with no or substantially no crystal growth to increase nucleation density. Alternatively, the polymer construct includes nucleating agent. The crystallinity of the polymer construct is increased with a high nucleation density through an increase in temperature, deformation, or both. An implantable medical device, such as a stent, can be fabricated from the polymer construct after the increase in crystallinity.
    Type: Application
    Filed: May 13, 2009
    Publication date: October 7, 2010
    Inventors: Yunbing Wang, Lothar W. Kleiner
  • Fixture for Mechanical Analysis of a Hollow Tube
    Publication number: 20100251838
    Abstract: A test fixture for use with a Dynamic Mechanical Analyzer (DMA) restrains a hollow cylindrical tube for purposes of performing either a tensile or transverse/bending load test. The fixture includes a clamp that is configured to restrain the tube without imparting a preload or changing a mechanical property of the tube.
    Type: Application
    Filed: June 18, 2010
    Publication date: October 7, 2010
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Jonathan Halderman, James Oberhauser, Yunbing Wang
  • STENTS FABRICATED FROM A SHEET WITH INCREASED STRENGTH, MODULUS AND FRACTURE TOUGHNESS
    Publication number: 20100244304
    Abstract: Methods of fabricating a polymeric stent from a polymer sheet with improved strength, modulus and fracture toughness are disclosed. The methods include stretching the polymer sheet along one or more axesto increase the strength, fracture toughness, and modulus of the polymer along the axis of stretching. The methods further include forming a tubular stent from the stretched sheet. The stent can include a slide-and-lock mechanism that permits the stent to move from a collapsed diameter to an expanded diameter and inhibiting radial recoil from the expanded diameter.
    Type: Application
    Filed: March 31, 2009
    Publication date: September 30, 2010
    Inventor: Yunbing Wang
  • Fixture for mechanical analysis of a hollow tube
    Patent number: 7770467
    Abstract: A test fixture for use with a Dynamic Mechanical Analyzer (DMA) restrains a hollow cylindrical tube for purposes of performing either a tensile or transverse/bending load test. The fixture includes a clamp that is configured to restrain the tube without imparting a preload or changing a mechanical property of the tube.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: August 10, 2010
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Jonathan Halderman, James Oberhauser, Yunbing Wang
  • Implantable medical devices comprising semi-crystalline poly(ester-amide)
    Patent number: 7771739
    Abstract: The current invention relates to an implantable medical device made of semi-crystalline poly(ester amide) (PEA) polymer.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: August 10, 2010
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Mikael O. Trollsas, David C. Gale, Yunbing Wang
  • Bioabsorbable Stent That Modulates Plaque Geometric Morphology And Chemical Composition
    Publication number: 20100198331
    Abstract: Methods of treating a diseased blood vessel exhibiting stenosis with a bioabsorable stent are disclosed. The implanted stent supports the section of the vessel at an increased diameter for a period of time to allow the vessel to heal. The stent loses radial strength sufficient to support the section of the vessel in less than 6 months after implantation, loses mechanical integrity, and then erodes away from the section. The biodegradable stent results in changes in properties of plaque with time as the stent degrades. The time-dependent properties include the luminal area of the plaque and plaque geometric morphology parameters.
    Type: Application
    Filed: July 27, 2009
    Publication date: August 5, 2010
    Inventors: Richard Rapoza, Yunbing Wang, James P. Oberhauser, Syed F.A. Hossainy
  • Bioabsorbable Stent And Treatment That Elicits Time-Varying Host-Material Response
    Publication number: 20100198330
    Abstract: Methods of treating a diseased blood vessel exhibiting stenosis with a bioabsorable stent are disclosed. The implanted stent supports the section of the vessel at an increased diameter for a period of time to allow the vessel to heal. The stent loses radial strength sufficient to support the section of the vessel in less than 6 months after implantation. Upon complete absorption of the stent, the section moves and functions in a manner that is the same, more similar to, or substantially as a normal blood vessel. In particular, the section can have an increased diameter allowing increased blood flow and vasomotion is partially or substantially completely restored in the section.
    Type: Application
    Filed: July 20, 2009
    Publication date: August 5, 2010
    Inventors: Syed F.A. Hossainy, Richard Rapoza, James P. Oberhauser, Yunbing Wang
  • Fracture Toughness Of Medical Devices With A Stereocomplex Nucleating Agent
    Publication number: 20100038822
    Abstract: Methods of fabricating a polymeric implantable device from a PLLA/PDLA blend such as a stent with improved fracture toughness are disclosed. The blend is melt processed to allow formation of stereocomplex crystallites, which are nucleation sites for crystal growth. A polymer construct is formed from the melt processed blend and device is formed from the polymer construct. The stereocomplex crystallites result in an in increase in nucleation density and reduced crystal size, which increases fracture toughness of the formed device.
    Type: Application
    Filed: August 12, 2008
    Publication date: February 18, 2010
    Inventors: Yunbing Wang, James Oberhauser
  • Method Of Improving Fracture Toughness Of Implantable Medical Devices Through Annealing
    Publication number: 20100036478
    Abstract: Methods of fabricating a polymeric implantable device with improved fracture toughness through annealing are disclosed herein. A polymeric construct is annealed with no or substantially no crystal growth to increase nucleation density. After the annealing, crystallites are grown around the formed nuclei. An implantable medical device, such as a stent, can be fabricated from the polymer construct after the crystallite growth.
    Type: Application
    Filed: August 11, 2008
    Publication date: February 11, 2010
    Inventors: Yunbing Wang, James Oberhauser
  • TUBE EXPANSION PROCESS FOR SEMICRYSTALLINE POLYMERS TO MAXIMIZE FRACTURE TOUGHNESS
    Publication number: 20100025894
    Abstract: Methods of fabricating a polymeric stent with improved fracture toughness including radial expansion of a polymer tube along its entire length at the same time and fabricating a stent from the expanded tube are disclosed herein.
    Type: Application
    Filed: April 15, 2009
    Publication date: February 4, 2010
    Applicant: Abbott Cardiovascular Inc.
    Inventors: Lothar W. Kleiner, James P. Oberhauser, Thierry Glauser, David K. Wrolstad, Yunbing Wang
  • Polyester Implantable Medical Device With Controlled In Vivo Biodegradability
    Publication number: 20090324670
    Abstract: This invention relates to blends of high, optionally medium, and low molecular weight polyesters where at least the low molecular weight polyester is substituted with an acidic moiety, the biodegradation of the blends being controllable by selection of the mean molecular weigh of each fraction, the quantity of each fraction in the blend and the amount and pKa of the acidic moiety(ies).
    Type: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventor: Yunbing Wang
  • Implantable Medical Devices Fabricated From Radiopaque Polymers With High Fracture Toughness
    Publication number: 20090326642
    Abstract: Medical devices, such as stents, fabricated from a polymer including degradable polymer segments joined by di-urethane linkages with radiopaque functional groups chemically bonded to the polymer are disclosed.
    Type: Application
    Filed: June 25, 2008
    Publication date: December 31, 2009
    Inventor: Yunbing Wang
  • Bioabsorbable Polymeric Stent With Improved Structural And Molecular Weight Integrity
    Publication number: 20090319031
    Abstract: Various embodiments of the present invention include implantable medical devices such as stents manufactured from polymers, and more particularly, biodegradable polymers including biodegradable polyesters. Other embodiments include methods of fabricating implantable medical devices from polymers. The devices and methods utilize one or more stabilizers, where each stabilizer may be chosen from the following categories: free radical scavengers, peroxide decomposers, catalyst deactivators, water scavengers, and metal scavengers.
    Type: Application
    Filed: June 19, 2008
    Publication date: December 24, 2009
    Inventors: Yunbing Wang, Stephen D. Pacetti, Carina V. Harold
  • Medical Devices Made From Polymers With End Group Modification For Improved Thermal Stability
    Publication number: 20090319036
    Abstract: Implantable medical devices and methods of forming thereof made from polymers with end groups providing improved thermal stability are disclosed. Implantable medical devices made from such polymers including stabilizing agents are additionally disclosed.
    Type: Application
    Filed: June 19, 2008
    Publication date: December 24, 2009
    Inventors: Yunbing Wang, Stephen D. Pacetti
  • Implantable Medical Devices Fabricated From Polyurethanes With Grafted Radiopaque Groups
    Publication number: 20090259297
    Abstract: Medical devices, such as stents, fabricated from a polymer including degradable polymer segments joined by di-urethane linkages with radiopaque functional groups chemically bonded to the polymer are disclosed.
    Type: Application
    Filed: April 10, 2008
    Publication date: October 15, 2009
    Inventor: Yunbing Wang
  • Stent With Nucleating Agent
    Publication number: 20090248147
    Abstract: The use of nucleating agents to manufacture polymeric stents is disclosed. The resulting stents may have increased crystallinity, decreased crystal size, increased mechanical properties, and faster degradation times.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 1, 2009
    Inventor: Yunbing Wang
  • Polymer Stent With Break-Away Links For Enhanced Stent Retention
    Publication number: 20090234432
    Abstract: Polymer stents with break-away links and methods of forming the links for improved stent retention on an expandable member during delivery are disclosed.
    Type: Application
    Filed: March 12, 2008
    Publication date: September 17, 2009
    Inventors: Stephen D. Pacetti, Timothy A. Limon, Yunbing Wang