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).

  • Method of making polymer-bioceramic composite implantable medical devices
    Patent number: 8512735
    Abstract: Methods and devices relating to polymer-bioceramic composite implantable medical devices, such as stents are disclosed. A suspension solution is formed including a fluid, a biodegradable polymer, and bioceramic particles. The biodegradable polymer and particles are precipitated from the suspension to form a mixture. A composite is formed by combining the mixture with another polymer and a scaffolding is formed from the composite.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: August 20, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: David C. Gale, Yunbing Wang, Syed Faiyaz Ahmed Hossainy, Bin Huang, Garth L. Wilkes, Vincent J. Gueriguian
  • Implantable medical devices fabricated from polyurethanes with biodegradable hard and soft blocks and blends thereof
    Patent number: 8501290
    Abstract: Medical devices, such as stents, fabricated at least in part from a polymer composite including a biodegradable elastomeric phase dispersed within a biodegradable polymeric matrix are disclosed. The composite is composed of a polyurethane block copolymer including soft polymer blocks and a hard polymer blocks.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: August 6, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventor: Yunbing Wang
  • Method to minimize chain scission and monomer generation in processing of poly(L-lactide) stent
    Patent number: 8496865
    Abstract: Methods of fabricating an implantable medical devices such as stents made from biodegradable polymers are disclosed that reduce or minimize chain scission and monomer generation during processing steps. The method includes processing a poly(L-lactide) resin having an number average molecular weight between 150 to 200 kD in an extruder in a molten state. A poly(L-lactide) tube is formed from the processed resin and a stent is fabricated from the tube. The number average molecular weight of the poly(L-lactide) of the stent after sterilization is 70 to 100 kD.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: July 30, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, James Oberhauser
  • Methods to improve adhesion of polymer coatings over stents
    Patent number: 8486482
    Abstract: Methods are disclosed to improved adhesion of polymer coatings over polymer surfaces of stents which include plasma treatment, applying an adhesion promoting layer, surface treatments with solvents, and mechanical roughening techniques.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: July 16, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, Daniel A. Castro, Stephen D. Pacetti
  • Implantable medical devices fabricated from branched polymers
    Patent number: 8486135
    Abstract: This invention relates to implantable medical devices, such as stents, fabricated from hyperbranched-like polymers, comb-like polymers, star polymers, dendrimer-like star polymers, dendrimers, and mixtures thereof.
    Type: Grant
    Filed: April 9, 2007
    Date of Patent: July 16, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, David C. Gale, Bin Huang, Mikael O. Trollsas, Thierry Glauser, Florian Ludwig
  • Methods of forming polymer-bioceramic composite medical devices with bioceramic particles
    Patent number: 8425591
    Abstract: Methods and devices relating to polymer-bioceramic composite implantable medical devices are disclosed.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: April 23, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, David C. Gale
  • Method for fabricating a polymer stent with break-away links for enhanced stent retenton
    Patent number: 8414638
    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: Grant
    Filed: March 12, 2008
    Date of Patent: April 9, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Stephen D. Pacetti, Timothy A. Limon, Yunbing Wang
  • RUBBER TOUGHENED BIORESORBABLE POLYMER PERIPHERAL SCAFFOLDS
    Publication number: 20130085563
    Abstract: Bioabsorbable scaffolds are disclosed with a rigid polymer component and a rubbery polymer component. The rubbery polymer component is miscible, partially miscible, or immiscible with the rigid polymer component.
    Type: Application
    Filed: October 3, 2011
    Publication date: April 4, 2013
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: John Stankus, Yunbing Wang, Mikael Trollsas, Syed Faiyaz Ahmed Hossainy, Michael H. Ngo, Dariush Davalian
  • MODIFIED SCAFFOLDS FOR PERIPHERAL APPLICATIONS
    Publication number: 20130085564
    Abstract: Stent scaffolds that include a polymeric structure or structures bonded to the scaffold and extending along their length are disclosed. The polymeric structure extends across some or all of the gaps in struts along the length of the scaffold. Segmented scaffolds are also disclosed that include two or more axial segments arranged end to end not connected by link struts.
    Type: Application
    Filed: October 3, 2011
    Publication date: April 4, 2013
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: John E. Papp, Mikael Trollsas, Dariush Davalian, Yunbing Wang, Syed Faiyaz Ahmed Hossainy
  • Method of improving fracture toughness of implantable medical devices through annealing
    Patent number: 8394317
    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: Grant
    Filed: August 11, 2008
    Date of Patent: March 12, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, James Oberhauser
  • Bioabsorbable stent with layers having different degradation rates
    Patent number: 8377533
    Abstract: A bioabsorbable stent and method of forming the same including a stent scaffolding formed from polymer layers with different degradation rates is disclosed. The polymer layers include an abluminal layer, a luminal layer, and optionally one or more middle layers. A degradation rate of the layers increases from the luminal layer to the abluminal layer.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: February 19, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventor: Yunbing Wang
  • Controlling Moisture In And Plasticization Of Bioresorbable Polymer For Melt Processing
    Publication number: 20130041129
    Abstract: Methods and systems for controlling the moisture content of biodegradable and bioresorbable polymer resin during extrusion above a lower limit that allows for plasticization of the polymer resin melt and below an upper limit to reduce or prevent molecular weight loss are disclosed. Methods are further disclosed involving plasticization of a polymer resin for feeding into an extruder with carbon dioxide and freon.
    Type: Application
    Filed: August 11, 2011
    Publication date: February 14, 2013
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Bethany Steichen, Stephen D. Pacetti, Manish Gada, Thierry Glauser, Lothar W. Kleiner, Yunbing Wang, James P. Oberhauser, Ni Ding
  • Fabricating an implantable medical device from an amorphous or very low crystallinity polymer construct
    Patent number: 8372332
    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: Grant
    Filed: May 13, 2009
    Date of Patent: February 12, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, Lothar Kleiner
  • Method and apparatus to prevent stent damage caused by laser cutting
    Patent number: 8373090
    Abstract: Apparatus, method and system for cutting a polymeric stent including the use of a polymeric mandrel as a laser shielding device. The polymeric mandrel is allowed to roll freely within a polymeric tube that is cut into a polymeric stent.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: February 12, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: David C. Gale, Yunbing Wang, Svava Maria Atladottir, Klaus Kleine
  • COLD ETHYLENE OXIDE STERILIZATION OF A BIODEGRADABLE POLYMERIC STENT
    Publication number: 20130032967
    Abstract: Methods of sterilizing medical devices, particularly stents, that include a polymer with ethylene oxide. The polymer may be in the device body or a coating on the device. The method entails exposure such that the temperature of the device does not exceed the glass transition temperature of the polymer in the wet stage, that is as plasticized by the sterilant. The sterilant may include water vapor.
    Type: Application
    Filed: September 19, 2011
    Publication date: February 7, 2013
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, Byron J. Lambert, Gregory S. Simmons
  • Polymer-and polymer blend-bioceramic composite implantable medical devices
    Patent number: 8343530
    Abstract: Implantable medical devices fabricated from polymer/bioceramic composites and polymer blend/bioceramic composites are disclosed.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: January 1, 2013
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, David C. Gale
  • Elastomeric Copolymer Coatings For Implantable Medical Devices
    Publication number: 20120330404
    Abstract: Implantable medical devices with elastomeric copolymer coatings are disclosed.
    Type: Application
    Filed: August 29, 2012
    Publication date: December 27, 2012
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventor: Yunbing Wang
  • Improving fracture toughness of medical devices with a stereocomplex nucleating agent
    Patent number: 8337739
    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: Grant
    Filed: August 12, 2008
    Date of Patent: December 25, 2012
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, James Oberhauser
  • Implantable medical devices comprising poly[l-lactide-co-(3,6-dialkyl-1,4-dioxane-2,5-dione)]
    Patent number: 8323678
    Abstract: This invention is directed to implantable medical device comprising a polymeric composition comprising poly[L-lactide-co-(3,6-dialkyl-1,4-dioxane-2,5-dione)], alone or as a blend with one or more polymers selected from the group consisting of poly(L-lactide) and poly(3,6-dialkyl-1,4-dioxane-2,5-dione).
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: December 4, 2012
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, Xiao Ma, Lothar Kleiner, Thierry Glauser
  • Method and System for Manufacturing a Polymer Endoprosthesis by Injection Molding and Blow Molding
    Publication number: 20120299226
    Abstract: A polymer endoprosthesis is fabricated by a combination of injection molding and blow molding which form a tubular substrate of polymer material, followed by laser cutting, crimping and sterilization. After the injection and blow molding processes, a subtractive process is performed on the tubular substrate to transform it into a stent having a network of stent struts. The tubular substrate can be made in an injection mold and blow mold which are attached to each other. The transition from injection molding and blow molding can be performed while the injection molded substrate remains at a temperature at or above Tg of the polymer material.
    Type: Application
    Filed: May 24, 2011
    Publication date: November 29, 2012
    Applicant: Abbott Cardiovascular Systems Inc,
    Inventors: Yunbing Wang, James Oberhauser