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).
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Patent number: 11357892Abstract: An expandable medical balloon including an inner layer formed of a poly (ether-block-amide) copolymer and an outer layer formed of a polyamide, the expandable medical balloon having a burst strength of greater than 50,000 psi, and to methods of making and using the same.Type: GrantFiled: April 2, 2019Date of Patent: June 14, 2022Assignee: BOSTON SCIENTIFIC SCIMED, INC.Inventors: John Jianhua Chen, Daniel James Horn
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Patent number: 10695124Abstract: Medical devices and methods for making and using medical devices are disclosed. An example medical device may include a catheter shaft. An expandable balloon may be coupled to the catheter shaft. The balloon may be capable of shifting between a folded configuration and an expanded configuration. A support structure may be coupled to the balloon. The support structure may be capable of shifting the balloon toward the folded configuration. A plurality of elongate flexible electrode assemblies may be disposed on the balloon. The elongate flexible electrode assemblies may be oriented at an angle relative to a longitudinal axis of the balloon.Type: GrantFiled: July 22, 2014Date of Patent: June 30, 2020Assignee: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Joel N. Groff, Patrick A. Haverkost, Martin R. Willard, Hong Cao, Daniel J. Horn, Kenneth R. Larson, John Jianhua Chen
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Patent number: 10675449Abstract: Composite fiber reinforced balloons for medical devices are prepared by applying a web of fibers to the exterior of a preformed underlayer balloon, encasing the web with a matrix material to form an assembly, and inserting the assembly into a preformed outer layer balloon to form the composite balloon.Type: GrantFiled: September 28, 2018Date of Patent: June 9, 2020Assignee: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Aaron Khieu, John Jianhua Chen, Ying Xiong, Joe Khammoungkhoune, Daniel James Horn, John Blix
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Patent number: 10363399Abstract: An expandable medical balloon, the expandable medical balloon comprising a first balloon wall, the first balloon wall comprising a first balloon layer of polyethylene terephthalate having a first intrinsic viscosity, the first layer is outer to a second layer of polyethylene terephthalate, the second balloon layer of polyethylene terephthalate having a second intrinsic viscosity, the second layer is an inner layer, wherein the intrinsic viscosity of the first balloon layer is higher than the intrinsic viscosity of the second balloon layer by about 0.05 dl/g or more.Type: GrantFiled: September 30, 2015Date of Patent: July 30, 2019Assignee: Boston Scientific Scimed, Inc.Inventors: John Jianhua Chen, Daniel James Horn, Adam Joseph Royer
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Publication number: 20190224382Abstract: An expandable medical balloon including an inner layer formed of a poly (ether-block-amide) copolymer and an outer layer formed of a polyamide, the expandable medical balloon having a burst strength of greater than 50,000 psi, and to methods of making and using the same.Type: ApplicationFiled: April 2, 2019Publication date: July 25, 2019Applicant: BOSTON SCIENTIFIC SCIMED, INC.Inventors: John Jianhua Chen, Daniel James Horn
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Patent number: 10258467Abstract: A guidewire system may include a guidewire having a relatively stiff proximal section and a relatively flexible distal section joined by a transition region, and a TAVI device slidably disposed on the guidewire. The guidewire may include an expandable element disposed about the transition region. The expandable element may be configured to expand from a collapsed configuration to an expanded configuration. The guidewire may include an expandable element disposed at the distal end. The distal section may be pre-configured to form more than one distal loop. A method of protecting an apex of a left ventricle during a TAVI procedure may include inserting a guidewire into the left ventricle, positioning a transition region adjacent the apex, expanding an expandable element such that the expandable element spans the apex, advancing a TAVI device distally over the guidewire to an aortic valve, and performing a TAVI procedure at the aortic valve.Type: GrantFiled: December 22, 2016Date of Patent: April 16, 2019Assignee: Boston Scientific Scimed Inc.Inventors: Dongming Hou, John Jianhua Chen, Robert Chang, Takashi H. Ino, Benjamin T. Sutton
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Publication number: 20190030301Abstract: Composite fiber reinforced balloons for medical devices are prepared by applying a web of fibers to the exterior of a preformed underlayer balloon, encasing the web with a matrix material to form an assembly, and inserting the assembly into a preformed outer layer balloon to form the composite balloon.Type: ApplicationFiled: September 28, 2018Publication date: January 31, 2019Applicant: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Aaron Khieu, John Jianhua Chen, Ying Xiong, Joe Khammoungkhoune, Daniel James Horn, John Blix
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Patent number: 10099039Abstract: Composite fiber reinforced balloons for medical devices are prepared by applying a web of fibers to the exterior of a preformed underlayer balloon, encasing the web with a matrix material to form an assembly, and inserting the assembly into a preformed outer layer balloon to form the composite balloon.Type: GrantFiled: November 17, 2016Date of Patent: October 16, 2018Assignee: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Aaron Khieu, John Jianhua Chen, Ying Xiong, Joe Khammoungkhoune, Daniel James Horn, John Blix
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Patent number: 9956321Abstract: 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: GrantFiled: July 15, 2014Date of Patent: May 1, 2018Assignee: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Lixiao Wang, Jeffrey S. Lindquist, Pao Nao Lee, John Jianhua Chen, Douglas A. Devens
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Publication number: 20180085499Abstract: 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: ApplicationFiled: September 29, 2017Publication date: March 29, 2018Applicant: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Lixiao Wang, Jeffrey S. Lindquist, Nao Pao Lee, John Jianhua Chen, Douglas A. Devens
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Publication number: 20180042673Abstract: Medical devices and methods for making and using the same are disclosed. An example medical device may include a medical device for renal nerve ablation. The medical device may include an elongate shaft having a distal region. An expandable member may be coupled to the distal region. A plurality of electrodes may be coupled to the expandable member and a single conductive member may be coupled to each electrode. Where one of the plurality of electrodes is active, the remaining electrodes may be inactive and act as ground or return electrodes. The electrode of the plurality of electrodes that is active may change over time.Type: ApplicationFiled: October 25, 2017Publication date: February 15, 2018Inventors: CASS A. HANSON, HONG CAO, JOHN JIANHUA CHEN, DEREK C. SUTERMEISTER, DANIEL T. QUILLIN, GARY J. PEDERSON
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Patent number: 9833283Abstract: Medical devices and methods for making and using the same are disclosed. An example medical device may include a medical device for renal nerve ablation. The medical device may include an elongate shaft having a distal region. An expandable member may be coupled to the distal region. A plurality of electrodes may be coupled to the expandable member and a single conductive member may be coupled to each electrode. Where one of the plurality of electrodes is active, the remaining electrodes may be inactive and act as ground or return electrodes. The electrode of the plurality of electrodes that is active may change over time.Type: GrantFiled: June 25, 2014Date of Patent: December 5, 2017Assignee: Boston Scientific Scimed, Inc.Inventors: Cass A. Hanson, Hong Cao, John Jianhua Chen, Derek C. Sutermeister, Daniel T. Quillin, Gary J. Pederson, Jr.
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Patent number: 9801981Abstract: 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: GrantFiled: August 24, 2012Date of Patent: October 31, 2017Assignee: Boston Scientific Scimed, Inc.Inventors: Lixiao Wang, John Jianhua Chen, Jeffrey S. Lindquist, Nao Pao Lee, Douglas A. Devens
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Publication number: 20170100244Abstract: A guidewire system may include a guidewire having a relatively stiff proximal section and a relatively flexible distal section joined by a transition region, and a TAVI device slidably disposed on the guidewire. The guidewire may include an expandable element disposed about the transition region. The expandable element may be configured to expand from a collapsed configuration to an expanded configuration. The guidewire may include an expandable element disposed at the distal end. The distal section may be pre-configured to form more than one distal loop. A method of protecting an apex of a left ventricle during a TAVI procedure may include inserting a guidewire into the left ventricle, positioning a transition region adjacent the apex, expanding an expandable element such that the expandable element spans the apex, advancing a TAVI device distally over the guidewire to an aortic valve, and performing a TAVI procedure at the aortic valve.Type: ApplicationFiled: December 22, 2016Publication date: April 13, 2017Applicant: BOSTON SCIENTIFIC SCIMED INC.Inventors: Dongming Hou, John Jianhua Chen, Robert Chang, Takashi H. Ino, Benjamin T. Sutton
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Publication number: 20170065795Abstract: Composite fiber reinforced balloons for medical devices are prepared by applying a web of fibers to the exterior of a preformed underlayer balloon, encasing the web with a matrix material to form an assembly, and inserting the assembly into a preformed outer layer balloon to form the composite balloon.Type: ApplicationFiled: November 17, 2016Publication date: March 9, 2017Applicant: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Aaron Khieu, John Jianhua Chen, Ying Xiong, Joe Khammoungkhoune, Daniel James Horn, John Blix
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Patent number: 9526873Abstract: Composite fiber reinforced balloons for medical devices are prepared by applying a web of fibers to the exterior of a preformed underlayer balloon, encasing the web with a matrix material to form an assembly, and inserting the assembly into a preformed outer layer balloon to form the composite balloon.Type: GrantFiled: September 2, 2015Date of Patent: December 27, 2016Assignee: Boston Scientific Scimed, Inc.Inventors: Aaron Khieu, John Jianhua Chen, Ying Xiong, Joe Khammoungkhoune, Daniel James Horn, John Blix
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Publication number: 20160089517Abstract: An expandable medical balloon, the expandable medical balloon comprising a first balloon wall, the first balloon wall comprising a first balloon layer of polyethylene terephthalate having a first intrinsic viscosity, the first layer is outer to a second layer of polyethylene terephthalate, the second balloon layer of polyethylene terephthalate having a second intrinsic viscosity, the second layer is an inner layer, wherein the intrinsic viscosity of the first balloon layer is higher than the intrinsic viscosity of the second balloon layer by about 0.05 dl/g or more.Type: ApplicationFiled: September 30, 2015Publication date: March 31, 2016Inventors: John Jianhua Chen, Daniel James Horn, Adam Joseph Royer
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Publication number: 20150374958Abstract: Composite fiber reinforced balloons for medical devices are prepared by applying a web of fibers to the exterior of a preformed underlayer balloon, encasing the web with a matrix material to form an assembly, and inserting the assembly into a preformed outer layer balloon to form the composite balloon.Type: ApplicationFiled: September 2, 2015Publication date: December 31, 2015Applicant: Boston Scientific Scimed, Inc.Inventors: Aaron Khieu, John Jianhua Chen, Ying Xiong, Joe Khammoungkhoune, Daniel James Horn, John Blix
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Patent number: 9144666Abstract: Composite fiber reinforced balloons for medical devices are prepared by applying a web of fibers to the exterior of a preformed underlayer balloon, encasing the web with a matrix material to form an assembly, and inserting the assembly into a preformed outer layer balloon to form the composite balloon.Type: GrantFiled: September 24, 2014Date of Patent: September 29, 2015Assignee: Boston Scientific Scimed, Inc.Inventors: Aaron Khieu, John Jianhua Chen, Ying Xiong, Joe Khammoungkhoune, Daniel James Horn, John Blix
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Publication number: 20150051696Abstract: A guidewire system may include a guidewire having a relatively stiff proximal section and a relatively flexible distal section joined by a transition region, and a TAVI device slidably disposed on the guidewire. The guidewire may include an expandable element disposed about the transition region. The expandable element may be configured to expand from a collapsed configuration to an expanded configuration. The guidewire may include an expandable element disposed at the distal end. The distal section may be pre-configured to form more than one distal loop. A method of protecting an apex of a left ventricle during a TAVI procedure may include inserting a guidewire into the left ventricle, positioning a transition region adjacent the apex, expanding an expandable element such that the expandable element spans the apex, advancing a TAVI device distally over the guidewire to an aortic valve, and performing a TAVI procedure at the aortic valve.Type: ApplicationFiled: August 13, 2014Publication date: February 19, 2015Inventors: Dongming Hou, John Jianhua Chen, Robert Chang, Takashi H. Ino, Benjamin T. Sutton