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).

  • Reducing crimping damage to a polymer scaffold
    Patent number: 9044352
    Abstract: A medical device includes a polymer scaffold crimped to a catheter having an expansion balloon. The scaffold is crimped to the catheter by a multi-step process for increasing scaffold-catheter yield following a crimping sequence. Damage reduction during a crimping sequence includes modifying blades of a crimper, adopting a multi-step crimping sequence, and inflating a supporting balloon to support the scaffold during crimping.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: June 2, 2015
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, Luis Vazquez, Hung T. Nguyen, Scott H. Mueller, Kathleen Yan
  • SHAPE MEMORY BIORESORBABLE POLYMER PERIPHERAL SCAFFOLDS
    Publication number: 20150142099
    Abstract: Bioabsorbable scaffolds having high crush recoverability, high fracture resistance, and reduced or no recoil due to self expanding properties at physiological conditions are disclosed. The scaffolds are made from a random copolymer of PLLA and a rubbery polymer such as polycaprolactone.
    Type: Application
    Filed: January 22, 2015
    Publication date: May 21, 2015
    Inventors: John S. Stankus, Hugh Zhao, Mikael Trollsas, Syed Faiyaz Ahmed Hossainy, Michael H. Ngo, Yunbing Wang, Benny Serna
  • METHODS OF STABILIZING MOLECULAR WEIGHT OF POLYMER STENTS AFTER STERILIZATION
    Publication number: 20150137428
    Abstract: Methods of stabilizing the molecular weight of polymer stents scaffolds after E-beam sterilization are disclosed. The molecular weight of the polymer of the irradiated scaffolds is stabilized through exposure to gas containing oxygen.
    Type: Application
    Filed: January 14, 2015
    Publication date: May 21, 2015
    Inventors: Yunbing Wang, Kerek Mortisen, Xiao Ma, Fuh-Wei Tang, Byron Lambert
  • Methods for crimping a polymeric stent onto a delivery balloon
    Patent number: 9032607
    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 15, 2014
    Date of Patent: May 19, 2015
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Kevin F. Jow, Arlene Sucy Yang, Yunbing Wang, Kathleen W. Yan
  • METHODS OF STABILIZING MOLECULAR WEIGHT OF POLYMER STENTS AFTER STERILIZATION
    Publication number: 20150128527
    Abstract: Methods of stabilizing the molecular weight of polymer stents scaffolds after E-beam sterilization are disclosed. The molecular weight of the polymer of the irradiated scaffolds is stabilized through exposure to gas containing oxygen.
    Type: Application
    Filed: January 14, 2015
    Publication date: May 14, 2015
    Inventors: Yunbing Wang, Derek Mortisen, Xiao Ma, Fuh-Wei Tang, Byron Lambert
  • Method of making polymer-bioceramic composite implantable medical devices from a suspension solution of bioceramic particles
    Patent number: 8999369
    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: August 7, 2013
    Date of Patent: April 7, 2015
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: David C. Gale, Yunbing Wang, Syed Faiyaz Ahmed Hossainy, Bin Huang, Garth L. Wilkes, Vincent J. Gueriguian
  • Stent formed from bioerodible metal-bioceramic composite
    Patent number: 8998978
    Abstract: Medical devices and methods of fabricating such medical devices, such as stents, formed at least in part from a metal matrix composite including bioceramic particles dispersed within an erodible metal are disclosed.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: April 7, 2015
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventor: Yunbing Wang
  • Shape memory bioresorbable polymer peripheral scaffolds
    Patent number: 8968387
    Abstract: Bioabsorbable scaffolds having high crush recoverability, high fracture resistance, and reduced or no recoil due to self expanding properties at physiological conditions are disclosed. The scaffolds are made from a random copolymer of PLLA and a rubbery polymer such as polycaprolactone.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: March 3, 2015
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: John S. Stankus, Hugh Zhao, Mikael Trollsas, Syed Faiyaz Ahmed Hossainy, Michael H. Ngo, Yunbing Wang, Benny Serna
  • Methods of stabilizing molecular weight of polymer stents after sterilization
    Patent number: 8966868
    Abstract: Methods of stabilizing the molecular weight of polymer stents scaffolds after E-beam sterilization are disclosed. The molecular weight of the polymer of the irradiated scaffolds is stabilized through exposure to gas containing oxygen.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: March 3, 2015
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, Derek Mortisen, Xiao Ma, Fuh-Wei Tang, Byron Lambert
  • METHOD TO MINIMIZE MOLECULAR WEIGHT DROP OF POLY(L-LACTIDE) STENT DURING PROCESSING
    Publication number: 20150054202
    Abstract: A method to reduce or minimize the reduction in molecular weight of a stent during processing is disclosed. The stent has a scaffolding including a polymer formulation comprising PLLA and polymandelide. The polymandelide reduces the molecular weight drop during processing, particularly during sterilization. The stent scaffolding can further include one or more additional stabilizing agents that additionally reduce the molecular weight drop during processing.
    Type: Application
    Filed: October 31, 2014
    Publication date: February 26, 2015
    Inventors: Byron Lambert, Yunbing Wang, James Oberhauser
  • POLY(L-LACTIDE) STENT WITH TUNABLE DEGRADATION RATE
    Publication number: 20150057744
    Abstract: Methods of making a biodegradable polymeric stent made from poly(L-lactide) and a low concentration of L-lactide monomer is disclosed. The concentration of L-lactide is adjusted to provide a degradation behavior that is suitable for different treatment applications including coronary, peripheral, and nasal. Methods include making a poly(L-lactide) material for a stent with uniformly distributed L-lactide monomer through control of polymerization conditions during PLLA synthesis, control of post-processing conditions, or both.
    Type: Application
    Filed: October 31, 2014
    Publication date: February 26, 2015
    Inventors: Yunbing Wang, Xiao Ma
  • Method of improving fracture toughness of implantable medical devices through annealing
    Patent number: 8961862
    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: March 11, 2013
    Date of Patent: February 24, 2015
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, James Oberhauser
  • TUBE EXPANSION PROCESSES FOR SEMICRYSTALLINE POLYMERS TO MAXIMIZE FRACTURE TOUGHNESS
    Publication number: 20140374963
    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: Application
    Filed: September 8, 2014
    Publication date: December 25, 2014
    Inventors: Lothar W. Kleiner, James P. Oberhauser, Thierry Glauser, David Wrolstad, Yunbing Wang
  • POLYESTER IMPLANTABLE MEDICAL DEVICE WITH CONTROLLED IN VIVO BIODEGRADABILITY
    Publication number: 20140364575
    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: August 11, 2014
    Publication date: December 11, 2014
    Inventor: Yunbing Wang
  • Methods for crimping a polymeric stent onto a delivery balloon
    Patent number: 8904619
    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: September 19, 2013
    Date of Patent: December 9, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Kevin F. Jow, Arlene Sucy Yang, Yunbing Wang, Kathleen W. Yan
  • METHODS FOR CRIMPING A POLYMERIC STENT ONTO A DELIVERY BALLOON
    Publication number: 20140352131
    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: Application
    Filed: August 15, 2014
    Publication date: December 4, 2014
    Inventors: Kevin F. Jow, Arlene Sucy Yang, Yunbing Wang, Kathleen W. Yan
  • CONTROL OF DEGRADATION PROFILE OF BIOABSORBABLE POLY(L-LACTIDE) SCAFFOLD
    Publication number: 20140353877
    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: Application
    Filed: August 14, 2014
    Publication date: December 4, 2014
    Inventors: Yunbing Wang, Xiao Ma
  • Method to make poly(L-lactide) stent with tunable degradation rate
    Patent number: 8889823
    Abstract: Methods of making a biodegradable polymeric stent made from poly(L-lactide) and a low concentration of L-lactide monomer is disclosed. The concentration of L-lactide is adjusted to provide a degradation behavior that is suitable for different treatment applications including coronary, peripheral, and nasal. Methods include making a poly(L-lactide) material for a stent with uniformly distributed L-lactide monomer through control of polymerization conditions during PLLA synthesis, control of post-processing conditions, or both.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: November 18, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Yunbing Wang, Xiao Ma
  • BIORESORBABLE IMPLANTS FOR TRANSMYOCARDIAL REVASCULARIZATION
    Publication number: 20140336747
    Abstract: Implants for treating insufficient blood flow to a heart muscle with transmyocardial revascularization are disclosed. Methods of treating insufficient blood flow to a heart muscle with the implant are also disclosed. The implant can have a body with an inner lumen that supports a channel in the heart muscle to allow for increased blood flow through the lumen upon implantation. The implant can include active agents to prevent or inhibit thrombotic closure of the channel, to promote vascularization, or both.
    Type: Application
    Filed: April 15, 2014
    Publication date: November 13, 2014
    Inventors: Richard Rapoza, Nadine Ding, Yunbing Wang, Stephen Pacetti, Derek Mortisen
  • Stents including poly(L-lactide) formulations that minimize molecular weight drop during processing
    Patent number: 8882825
    Abstract: A stent scaffolding including a polymer formulation comprising PLLA and polymandelide is disclosed. The polymandelide reduces the molecular weight drop during processing, particularly during sterilization. The stent scaffolding can further include one or more additional stabilizing agents that additionally reduce the molecular weight drop during processing.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: November 11, 2014
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Byron Lambert, Yunbing Wang, James Oberhauser