Patents by Inventor John Jianhua Chen

John Jianhua Chen 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).

  • Publication number: 20040170782
    Abstract: A medical balloon having a high burst strength and the ability to return to its preinflation diameter following repeated inflation may be prepared from a first inner layer of material, a second intermediate layer of expanded PTFE and a third outer layer of material.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 2, 2004
    Applicant: Scimed Life Systems, Inc.
    Inventors: Lixiao Wang, John Jianhua Chen
  • Publication number: 20040146670
    Abstract: Multilayer medical devices, apparatuses for making such devices, and methods of making such devices are disclosed.
    Type: Application
    Filed: January 27, 2003
    Publication date: July 29, 2004
    Inventors: Albert Chin, John Jianhua Chen, Thomas A. Svatek, Ronald A. Sahatjian
  • Patent number: 6764504
    Abstract: A stent delivery catheter comprising a catheter shaft and balloon engaged thereto. The balloon being inflatable from a first inflation state to a first expanded state as well as to a second expanded state. The balloon having a stent mounting region for retaining and delivery of a stent therefrom, and at least one adjacent region. The stent mounting region having a first diameter and the at least one adjacent region having a second diameter. In the first inflation state the first diameter being less than the second diameter. In the first expanded state the first diameter being no greater than the second diameter. In the second expanded state the first diameter being greater than the second diameter. The stent being retained on the stent mounting region by engagement of the at least one adjacent portion and at least one retractable stent retaining sleeve.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: July 20, 2004
    Assignee: SciMed Life Systems, Inc.
    Inventors: Lixiao Wang, John Jianhua Chen
  • Patent number: 6756094
    Abstract: A medical balloon having a high burst strength and the ability to return to its preinflation diameter following repeated inflation may be prepared from a first inner layer of material, a second intermediate layer of expanded PTFE and a third outer layer of material.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: June 29, 2004
    Assignee: SciMed Life Systems, Inc.
    Inventors: Lixiao Wang, John Jianhua Chen
  • Publication number: 20040109966
    Abstract: A medical tubing is disclosed which includes a first material extending between proximal and distal ends of the tubing and which defines a lumen of the tubing. The tubing also includes a second material extending between at least portion of the distance between the proximal and distal ends of the tubing and that is embedded in the first material. The second material is fractured. The first material is flexible and the second material is relatively rigid and brittle and the two materials combined to provide a medical tubing that exhibits strain softening behavior.
    Type: Application
    Filed: December 4, 2002
    Publication date: June 10, 2004
    Inventors: John Jianhua Chen, Douglas A. Devens, Paul James Miller, Edward Parsonage
  • Publication number: 20040048016
    Abstract: A medical device, for instance a device inserted into the body such as catheter or a balloon, at least a portion of which is made of a thermoplastic polymeric material. The thermoplastic polymeric material comprises a blend or laminate of an aromatic protectant polymer and a radiation sensitive polymer, and/or the polymeric material includes a stabilizer against radiation oxidative degradation. The device is sterilized by exposure to high energy radiation.
    Type: Application
    Filed: September 11, 2002
    Publication date: March 11, 2004
    Applicant: SciMed Life Systems, Inc.
    Inventors: Lixiao Wang, John Jianhua Chen
  • Publication number: 20030167067
    Abstract: A tubular parison for forming a medical device balloon. The parison is formed of a polymeric material, for instance a thermoplastic elastomer. The parison has an elongation at break which is not more than 80% of the elongation of the bulk polymeric material. The elongation of the parison is controlled by altering extrusion conditions. Balloons prepared from the parisons provide higher wall strength and/or higher inflation durability than balloons prepared from conventional parisons of the same material.
    Type: Application
    Filed: February 28, 2002
    Publication date: September 4, 2003
    Inventors: Lixiao Wang, John Jianhua Chen, Jeffrey S. Lindquist, Nao Pao Lee, Douglas A. Devens
  • Patent number: 6562061
    Abstract: A stent delivery balloon structure is formed by molding at a desired pressure, temperature and tension a medical balloon with a tube disposed thereabout and subsequently removing one or more layers of material from the body portion of the thus formed medical balloon structure.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: May 13, 2003
    Assignee: SciMed Life Systems, Inc.
    Inventors: Lixiao Wang, John Jianhua Chen
  • Publication number: 20030055378
    Abstract: An inflatable medical balloon for multiple procedures, including angioplasty procedures, procedures for delivering medical devices, such as stents, and a method of making the catheter systems. The catheter system employs a balloon having a plurality of flexible portions and a combination of hard and soft portions.
    Type: Application
    Filed: September 14, 2001
    Publication date: March 20, 2003
    Inventors: Yiqun Bruce Wang, John Jianhua Chen, Lixiao Wang, Jason Todd Lenz
  • Patent number: 6478814
    Abstract: A stent delivery system which has a catheter including an inflatable portion. A stent being disposed about the inflatable portion of the catheter, the stent having a contracted state and an expanded state. A pair of stent retaining sleeves which are partially composed of PTFE, each sleeve having a first end portion overlying a respective end of the stent, each sleeve having a second end portion respectively attached to the catheter, the sleeves retaining the stent to the catheter when the stent is in the contracted state, the stent being freed from the sleeves when the stent is placed in the expanded state. The sleeves being placed on the stent by heat shrinking. The inflatable portion of the balloon optionally having stepped compliant characteristics.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: November 12, 2002
    Assignee: Scimed Life Systems, Inc.
    Inventors: Lixiao Wang, John Jianhua Chen, The Thomas Trinh Tran, Jon St. Germain, David J. Blaeser
  • Publication number: 20020165523
    Abstract: A medical device such as a tube or a balloon including wall structure with multiple layers. The wall structure can distribute stress, resulting in reduced defect propagation and failure.
    Type: Application
    Filed: March 2, 2001
    Publication date: November 7, 2002
    Inventors: Albert C. C. Chin, John Jianhua Chen, Yiqun Wang, David W. Lodin, Lixiao Wang, Ronald A. Sahatjian, Ismail Guler, Robert Burgmeier
  • Patent number: 6458867
    Abstract: The present invention relates to a medical device comprising at least one tubular member having an inner surface and an outer surface. The inner surface of the tubular member is at least occasionally subjected to contact with at least one second surface. The tubular member therefore comprises a hydrophilic lubricious coating disposed on its inner surface to reduce the friction between the inner surface of the tubular member and the second surface which is caused by movement.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: October 1, 2002
    Assignee: SciMed Life Systems, Inc.
    Inventors: Lixiao Wang, Dachuan Yang, John Jianhua Chen, Yiqun Bruce Wang, Lance A. Monroe, Joel R. Munsinger
  • Publication number: 20020120320
    Abstract: A stent delivery catheter comprising a catheter shaft and balloon engaged thereto. The balloon being inflatable from a first inflation state to a first expanded state as well as to a second expanded state. The balloon having a stent mounting region for retaining and delivery of a stent therefrom, and at least one adjacent region. The stent mounting region having a first diameter and the at least one adjacent region having a second diameter. In the first inflation state the first diameter being less than the second diameter. In the first expanded state the first diameter being no greater than the second diameter. In the second expanded state the first diameter being greater than the second diameter. The stent being retained on the stent mounting region by engagement of the at least one adjacent portion and at least one retractable stent retaining sleeve.
    Type: Application
    Filed: January 4, 2001
    Publication date: August 29, 2002
    Inventors: Lixiao Wang, John Jianhua Chen
  • Publication number: 20020038140
    Abstract: A stent delivery system comprising a catheter. The catheter including a stent mounting region and a stent disposed thereabout. The stent having a distal end and a proximal end, and an unexpanded state and an expanded state. At least one stent retaining sleeve, having a first end and a second end, wherein the first end overlays an end of the stent when the stent is in the unexpanded state. The second end engaged to at least a portion of the catheter adjacent to the stent mounting region. The stent retaining sleeve(s) comprising a first material and at least one substantially longitudinally oriented fiber of a second material. The first material having a predetermined tensile modulus and the second material having a predetermined tensile modulus, wherein the predetermined tensile modulus of the second material is greater than that of the first material.
    Type: Application
    Filed: December 29, 2000
    Publication date: March 28, 2002
    Inventors: Dachuan Yang, Paul J. Miller, Jan D. Seppala, Albert C. C. Chin, John Jianhua Chen, Daniel J. Horn
  • Publication number: 20010043998
    Abstract: An inflatable medical balloon comprises a polymer matrix material and a plurality of fibers distributed in the matrix material. The plurality of fibers operatively adhere to the matrix material and provide reinforcement thereof. The fibers may be parallel or angularly oriented relative to the longitudinal balloon axis, and may be helically disposed thereabout. The fibers may be composed of material which has a greater tensile strength than the matrix material. The fibers may be microfibers formed by phase separation of a melt blend material during extrusion or polymer cores coextruded with the matrix material and surrounded thereby. The balloon may be formed of alternating layers of fiber-free polymer and layers of fiber-containing polymer.
    Type: Application
    Filed: June 20, 2001
    Publication date: November 22, 2001
    Inventors: John Jianhua Chen, Lixiao Wang, Yiqun Wang, Albert C. C. Chin
  • Publication number: 20010032008
    Abstract: A stent delivery system which has a catheter including an inflatable portion. A stent being disposed about the inflatable portion of the catheter, the stent having a contracted state and an expanded state. A pair of stent retaining sleeves which are partially composed of PTFE, each sleeve having a first end portion overlying a respective end of the stent, each sleeve having a second end portion respectively attached to the catheter, the sleeves retaining the stent to the catheter when the stent is in the contracted state, the stent being freed from the sleeves when the stent is placed in the expanded state. The sleeves being placed on the stent by heat shrinking. The inflatable portion of the balloon optionally having stepped compliant characteristics.
    Type: Application
    Filed: September 28, 1999
    Publication date: October 18, 2001
    Applicant: William E. Anderson
    Inventors: LIXIAO WANG, JOHN JIANHUA CHEN, THE THOMAS TRINH TRAN, JON ST. GERMAIN, DAVID J. BLAESER