Patents by Inventor Helen Nguyen
Helen Nguyen 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: 12295583Abstract: An implant delivery system may have a pusher. The pusher may have an elongated shape. A distal end of the pusher may be configured to connect to an implant. The implant delivery system may have a tether connected to the pusher and to the implant. The implant delivery system may have a heating element mounted over the tether biased to contract a first surface of the heating element towards a second surface of the pusher. The implant delivery system may have an expander disposed between the first surface of the heating element and the second surface of the pusher. The expander may be configured to melt, allowing the first surface to contact the second surface, upon activation of the heating element.Type: GrantFiled: December 13, 2023Date of Patent: May 13, 2025Assignee: MicroVention, Inc.Inventors: Tai D. Tieu, Hideo Morita, Helen Nguyen
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Publication number: 20240390170Abstract: Disclosed is a method, apparatus, and kit for assisting the expansion of a self-expanding stent, especially within highly curved or tortuous blood vessels. An elongated pusher having an expandable distal mesh portion can be positioned within a self-expanding stent, expanding during delivery to provide extra expansion force to the stent to ensure the stent properly expands.Type: ApplicationFiled: August 5, 2024Publication date: November 28, 2024Applicant: MicroVention, Inc.Inventors: Ponaka Pung, Helen Nguyen
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Publication number: 20240341982Abstract: In one embodiment according to the present invention, a stent is described having a generally cylindrical body formed from a single woven nitinol wire. The distal and proximal ends of the stent include a plurality of loops, some of which include marker members used for visualizing the position of the stent. In another embodiment, the previously described stent includes an inner flow diverting layer.Type: ApplicationFiled: April 12, 2024Publication date: October 17, 2024Applicant: Terumo CorporationInventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
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Patent number: 12076260Abstract: Disclosed is a method, apparatus, and kit for assisting the expansion of a self-expanding stent, especially within highly curved or tortuous blood vessels. An elongated pusher having an expandable distal mesh portion can be positioned within a self-expanding stent, expanding during delivery to provide extra expansion force to the stent to ensure the stent properly expands.Type: GrantFiled: June 24, 2020Date of Patent: September 3, 2024Assignee: MicroVention, Inc.Inventors: Ponaka Pung, Helen Nguyen
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Publication number: 20240238110Abstract: A vascular implant may comprise at least a first layer having one or more drawn fill tube wires (DFT wires) and at least a second layer having one or more non-DFT wires. The first layer may be braided from only a single DFT wire, and the second layer may be braided from a plurality of non-DFT wire. A vascular implant may also include a connecting wire composed of a shape memory alloy and that is shape set prior to connection to one or more implant layers composed of DFT wires.Type: ApplicationFiled: May 18, 2022Publication date: July 18, 2024Applicant: MicroVention, Inc.Inventors: Dieter Rutzen, Ponaka Pung, Shameem Golshan, Helen Nguyen, Oanh Nguyen, Britney Ngo, Minh Nguyen, Marcus Kraus, Nazanin Nourani
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Publication number: 20240173155Abstract: Implant engagement mechanisms are disclosed for maintaining engagement with a stent until it has been fully deployed and expanded from a catheter or sheath. The apparatus, method and system involving these engagement mechanisms allow a physician to withdraw or retract a sheath prior to full deployment, thereby allowing for redeployment of the stent at a more desirable position.Type: ApplicationFiled: February 8, 2024Publication date: May 30, 2024Applicant: MicroVention, Inc.Inventors: Ponaka Pung, Tai D. Tieu, Ross Soltanian, Helen Nguyen, Oanh Nguyen, Britney Ngo
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Patent number: 11980554Abstract: In one embodiment according to the present invention, a stent is described having a generally cylindrical body formed from a single woven nitinol wire. The distal and proximal ends of the stent include a plurality of loops, some of which include marker members used for visualizing the position of the stent. In another embodiment, the previously described stent includes an inner flow diverting layer.Type: GrantFiled: July 19, 2021Date of Patent: May 14, 2024Assignee: Terumo CorporationInventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
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Publication number: 20240108352Abstract: An implant delivery system may have a pusher. The pusher may have an elongated shape. A distal end of the pusher may be configured to connect to an implant. The implant delivery system may have a tether connected to the pusher and to the implant. The implant delivery system may have a heating element mounted over the tether biased to contract a first surface of the heating element towards a second surface of the pusher. The implant delivery system may have an expander disposed between the first surface of the heating element and the second surface of the pusher. The expander may be configured to melt, allowing the first surface to contact the second surface, upon activation of the heating element.Type: ApplicationFiled: December 13, 2023Publication date: April 4, 2024Applicant: MicroVention, Inc.Inventors: Tai D. Tieu, Hideo Morita, Helen Nguyen
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Patent number: 11931277Abstract: Implant engagement mechanisms are disclosed for maintaining engagement with a stent until it has been fully deployed and expanded from a catheter or sheath. The apparatus, method and system involving these engagement mechanisms allow a physician to withdraw or retract a sheath prior to full deployment, thereby allowing for redeployment of the stent at a more desirable position.Type: GrantFiled: April 2, 2021Date of Patent: March 19, 2024Assignee: MicroVention, Inc.Inventors: Ponaka Pung, Tai D. Tieu, Ross Soltanian, Helen Nguyen, Oanh Nguyen, Britney Ngo
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Patent number: 11857196Abstract: A system and method of delivering and detaching an implant within a body of a patient is described. A tether connects an implant with a delivery device. The delivery device includes a heater coil through which the tether passes. The inner diameter of the heater coil is about the same size or slightly larger than the outer diameter of the tether, allowing the tether to more efficiently break the tether during delivery.Type: GrantFiled: February 16, 2021Date of Patent: January 2, 2024Assignee: MicroVention, Inc.Inventors: Tai D. Tieu, Hideo Morita, Helen Nguyen
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Publication number: 20230310185Abstract: A stent with varying porosity is described. The stent can be comprised of multiple stents attached together. A braided stent may have selected regions of increased thickness. The stent may be comprised of wires that are welded together at their ends in order to minimize vessel trauma. The stent may comprise a helically wound radiopaque wire wound through the stent.Type: ApplicationFiled: June 5, 2023Publication date: October 5, 2023Applicant: MicroVention, Inc.Inventors: Ponaka Pung, Helen Nguyen, Tai D. Tieu
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Patent number: 11696843Abstract: A stent with varying porosity is described. The stent can be comprised of multiple stents attached together. A braided stent may have selected regions of increased thickness. The stent may be comprised of wires that are welded together at their ends in order to minimize vessel trauma. The stent may comprise a helically wound radiopaque wire wound through the stent.Type: GrantFiled: September 15, 2020Date of Patent: July 11, 2023Assignee: MicroVention, Inc.Inventors: Ponaka Pung, Helen Nguyen, Tai D. Tieu
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Patent number: 11351046Abstract: In one embodiment according to the present invention, a stent is described having a generally cylindrical body formed from a single woven nitinol wire. The distal and proximal ends of the stent include a plurality of loops, some of which include marker members used for visualizing the position of the stent. In another embodiment, the previously described stent includes an inner flow diverting layer.Type: GrantFiled: October 1, 2019Date of Patent: June 7, 2022Assignee: Terumo CorporationInventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
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Patent number: 11291566Abstract: In one embodiment according to the present invention, a stent is described having a generally cylindrical body formed from a single woven nitinol wire. The distal and proximal ends of the stent include a plurality of loops, some of which include marker members used for visualizing the position of the stent. In another embodiment, the previously described stent includes an inner flow diverting layer.Type: GrantFiled: April 29, 2021Date of Patent: April 5, 2022Assignee: Terumo CorporationInventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
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Publication number: 20210346181Abstract: In one embodiment according to the present invention, a stent is described having a generally cylindrical body formed from a single woven nitinol wire. The distal and proximal ends of the stent include a plurality of loops, some of which include marker members used for visualizing the position of the stent. In another embodiment, the previously described stent includes an inner flow diverting layer.Type: ApplicationFiled: July 19, 2021Publication date: November 11, 2021Applicant: Terumo CorporationInventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
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Publication number: 20210244552Abstract: In one embodiment according to the present invention, a stent is described having a generally cylindrical body formed from a single woven nitinol wire. The distal and proximal ends of the stent include a plurality of loops, some of which include marker members used for visualizing the position of the stent. In another embodiment, the previously described stent includes an inner flow diverting layer.Type: ApplicationFiled: April 29, 2021Publication date: August 12, 2021Applicant: Terumo CorporationInventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
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Publication number: 20210220158Abstract: Implant engagement mechanisms are disclosed for maintaining engagement with a stent until it has been fully deployed and expanded from a catheter or sheath. The apparatus, method and system involving these engagement mechanisms allow a physician to withdraw or retract a sheath prior to full deployment, thereby allowing for redeployment of the stent at a more desirable position.Type: ApplicationFiled: April 2, 2021Publication date: July 22, 2021Applicant: MicroVention, Inc.Inventors: Ponaka Pung, Tai D. Tieu, Ross Soltanian, Helen Nguyen, Oanh Nguyen, Britney Ngo
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Publication number: 20210161539Abstract: A system and method of delivering and detaching an implant within a body of a patient is described. A tether connects an implant with a delivery device. The delivery device includes a heater coil through which the tether passes. The inner diameter of the heater coil is about the same size or slightly larger than the outer diameter of the tether, allowing the tether to more efficiently break the tether during delivery.Type: ApplicationFiled: February 16, 2021Publication date: June 3, 2021Applicant: MicroVention, Inc.Inventors: Tai D. Tieu, Hideo Morita, Helen Nguyen
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Patent number: 11000394Abstract: Implant engagement mechanisms are disclosed for maintaining engagement with a stent until it has been fully deployed and expanded from a catheter or sheath. The apparatus, method and system involving these engagement mechanisms allow a physician to withdraw or retract a sheath prior to full deployment, thereby allowing for redeployment of the stent at a more desirable position.Type: GrantFiled: January 10, 2019Date of Patent: May 11, 2021Assignee: MicroVention, Inc.Inventors: Ponaka Pung, Tai D. Tieu, Ross Soltanian, Helen Nguyen, Oanh Nguyen, Britney Ngo
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Publication number: 20210030570Abstract: A stent with varying porosity is described. The stent can be comprised of multiple stents attached together. A braided stent may have selected regions of increased thickness. The stent may be comprised of wires that are welded together at their ends in order to minimize vessel trauma. The stent may comprise a helically wound radiopaque wire wound through the stent.Type: ApplicationFiled: September 15, 2020Publication date: February 4, 2021Applicant: MicroVention, Inc.Inventors: Ponaka Pung, Helen Nguyen, Tai D. Tieu