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).

  • BIOABSORBABLE SCAFFOLD WITH PARTICLES PROVIDING DELAYED ACCELERATION OF DEGRADATION
    Publication number: 20140319724
    Abstract: Methods of controlling the degradation profile of a biodegradable stent scaffolding are disclosed. A bioabsorbable scaffold having a plurality of particles incorporated into the scaffolding that accelerate the absorption of the scaffolding after an induction time during degradation is disclosed.
    Type: Application
    Filed: March 24, 2014
    Publication date: October 30, 2014
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, James Oberhauser
  • CONTROLLING MOISTURE IN AND PLASTICIZATION OF BIORESORBABLE POLYMER FOR MELT PROCESSING
    Publication number: 20140298675
    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: June 20, 2014
    Publication date: October 9, 2014
    Inventors: Bethany Steichen, Stephen Pacetti, Manish Gada, Thierry Glauser, Lothar Kleiner, Yunbing Wang, James Oberhauser, Ni Ding
  • Stent with nucleating agent
    Patent number: 8852263
    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: Grant
    Filed: July 12, 2012
    Date of Patent: October 7, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventor: Yunbing Wang
  • Methods for crimping a polymeric stent scaffold onto a delivery balloon
    Patent number: 8844113
    Abstract: A medical device includes a polymer stent scaffold crimped to a catheter having an expansion balloon. A process for forming the medical device includes placing the scaffold on a support supported by an alignment carriage, and deionizing the scaffold to remove any static charge buildup on the scaffold before placing the scaffold within a crimper to reduce the scaffold's diameter. The polymer scaffold is heated to a temperature below the polymer's glass transition temperature to improve scaffold retention without adversely affecting the mechanical characteristics of the scaffold when deployed to support a body lumen.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: September 30, 2014
    Assignee: Abbott Cardiovascular Systems, Inc.
    Inventor: Yunbing Wang
  • METHOD TO MINIMIZE CHAIN SCISSION AND MONOMER GENERATION IN PROCESSING OF POLY(L-LACTIDE) STENT
    Publication number: 20140288628
    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: Application
    Filed: March 26, 2014
    Publication date: September 25, 2014
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, James Oberhauser
  • Controlling moisture in and plasticization of bioresorbable polymer for melt processing
    Patent number: 8841412
    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: Grant
    Filed: August 11, 2011
    Date of Patent: September 23, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Bethany Steichen, Stephen D. Pacetti, Manish Gada, Thierry Glauser, Lothar W. Kleiner, Yunbing Wang, James P. Oberhauser, Ni Ding
  • DRUG DELIVERY DEVICE FOR PERIPHERAL ARTERY DISEASE
    Publication number: 20140277398
    Abstract: A medical device implantable within a peripheral vessel of the body composed of a bioresorbable polymer is disclosed. The device has a high resistance to fracture, is very flexible, and has a high crush recovery when subjected to crushing, axial, or torsional forces.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, James Oberhauser, Manish Gada
  • Control of degradation profile of bioabsorbable poly(l-lactide) scaffold
    Patent number: 8834776
    Abstract: Methods of controlling the degradation profile of a biodegradable stent scaffolding are disclosed. Disclosed methods include controlling features of the degradation profile including the time to loss of radial strength and the degradation time of the stent.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: September 16, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, Xiao Ma
  • METHODS FOR CRIMPING A POLYMERIC STENT SCAFFOLD ONTO A DELIVERY BALLOON
    Publication number: 20140250667
    Abstract: A medical device includes a polymer stent scaffold crimped to a catheter having an expansion balloon. A process for forming the medical device includes placing the scaffold on a support supported by an alignment carriage, and deionizing the scaffold to remove any static charge buildup on the scaffold before placing the scaffold within a crimper to reduce the scaffold's diameter. The polymer scaffold is heated to a temperature below the polymer's glass transition temperature to improve scaffold retention without adversely affecting the mechanical characteristics of the scaffold when deployed to support a body lumen.
    Type: Application
    Filed: May 16, 2014
    Publication date: September 11, 2014
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventor: Yunbing Wang
  • Tube expansion processes for semicrystalline polymers to maximize fracture toughness
    Patent number: 8828305
    Abstract: Methods for fabricating a polymeric stent with improved fracture toughness including radial expansion of a polymer tube and fabricating a stent from the expanded tube are disclosed. The polymer tube is disposed within a mold and may be heated with radiation. The heated tube radially expands within the mold.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: September 9, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Lothar W. Kleiner, James P. Oberhauser, Thierry Glauser, David K. Wrolstad, Yunbing Wang
  • SYSTEM FOR MANUFACTURING A POLYMER ENDOPROSTHESIS BY INJECTION MOLDING AND BLOW MOLDING
    Publication number: 20140239558
    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 2, 2014
    Publication date: August 28, 2014
    Applicant: ABBOTT CARDIOVASCULAR SYSTEMS INC.
    Inventors: Yunbing Wang, James Oberhauser
  • METHODS FOR CRIMPING A POLYMERIC SCAFFOLD TO A DELIVERY BALLOON AND ACHIEVING STABLE MECHANICAL PROPERTIES IN THE SCAFFOLD AFTER CRIMPING
    Publication number: 20140230227
    Abstract: A medical device-includes a polymer scaffold crimped to a catheter having an expansion balloon. The scaffold is crimped to the balloon by a process that includes inflating the delivery balloon during a diameter reduction to improve scaffold retention. A crimping temperature is maintained at about the onset of glass transition of the polymer material to facilitate more rapid stabilization of mechanical properties in the scaffold following crimping.
    Type: Application
    Filed: April 28, 2014
    Publication date: August 21, 2014
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventor: Yunbing Wang
  • MODIFIED SCAFFOLDS FOR PERIPHERAL APPLICATIONS
    Publication number: 20140228930
    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 sruts.
    Type: Application
    Filed: April 16, 2014
    Publication date: August 14, 2014
    Applicant: ABBOTT CARDIOVASCULAR SYSTEMS INC.
    Inventors: John E. Papp, Mikael Trollsas, Dariush Davalian, Yunbing Wang, Syed Faiyaz Ahmed Hossainy
  • Polyester implantable medical device with controlled in vivo biodegradability
    Patent number: 8802126
    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: Grant
    Filed: June 30, 2008
    Date of Patent: August 12, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventor: Yunbing Wang
  • Methods for crimping a polymeric scaffold to a delivery balloon and achieving stable mechanical properties in the scaffold after crimping
    Patent number: 8752265
    Abstract: A medical device-includes a polymer scaffold crimped to a catheter having an expansion balloon. The scaffold is crimped to the balloon by a process that includes inflating the delivery balloon during a diameter reduction to improve scaffold retention. A crimping temperature is maintained at about the onset of glass transition of the polymer material to facilitate more rapid stabilization of mechanical properties in the scaffold following crimping.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: June 17, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventor: Yunbing Wang
  • Methods for crimping a polymeric stent onto a delivery balloon
    Patent number: 8752266
    Abstract: A medical device-includes a polymer stent crimped to a catheter having an expansion balloon. The stent is crimped to the balloon by a process that includes heating the stent to a temperature below the polymer's glass transition temperature to improve stent retention without adversely affecting the mechanical characteristics of the stent when later deployed to support a body lumen.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: June 17, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Kevin F. Jow, Arlene Sucy Yang, Yunbing Wang, Kathleen W. Yan
  • Sheaths Reducing Recoil and Loss of Retention for Polymer Scaffolds Crimped to Balloons
    Publication number: 20140157567
    Abstract: A medical device includes a polymer scaffold crimped to a catheter having an expansion balloon. A single piece sheath is placed over the scaffold immediately following crimping of the scaffold to the balloon. The single piece sheath is replaced by a two-piece sheath, which is removed prior to performing a medical procedure using the medical device.
    Type: Application
    Filed: December 7, 2012
    Publication date: June 12, 2014
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, Jhoan Bayogo
  • Method and system for manufacturing a polymer endoprosthesis by injection molding and blow molding
    Patent number: 8747728
    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: Grant
    Filed: May 24, 2011
    Date of Patent: June 10, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, James Oberhauser
  • Method for stent retention on a balloon catheter
    Patent number: 8739384
    Abstract: A balloon is inflated from a collapsed configuration, then deflated. A polymeric stent is then disposed over the deflated balloon and the stent crimped to the balloon.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: June 3, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, Gregory Kilinski, Luis Vazquez
  • Biodegradable stent with enhanced fracture toughness
    Publication number: 20140128959
    Abstract: Stents and methods of manufacturing a stents with enhanced fracture toughness are disclosed.
    Type: Application
    Filed: October 9, 2013
    Publication date: May 8, 2014
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: David C. Gale, Bin Huang, Timothy A. Limon, Vincent J. Gueriguian, Anthony J. Abbate, Klaus Kleine, Stephen Schaible, Jonathan P. Durcan, Thierry Glauser, Bethany Steichen, James Oberhauser, Manish Gada, Lothar Kleiner, Mary Beth Kossuth, Yunbing Wang, Daniel Castro, David Wrolstad