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).

  • Patent number: 12295583
    Abstract: 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: Grant
    Filed: December 13, 2023
    Date of Patent: May 13, 2025
    Assignee: MicroVention, Inc.
    Inventors: Tai D. Tieu, Hideo Morita, Helen Nguyen
  • Publication number: 20240390170
    Abstract: 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: Application
    Filed: August 5, 2024
    Publication date: November 28, 2024
    Applicant: MicroVention, Inc.
    Inventors: Ponaka Pung, Helen Nguyen
  • Publication number: 20240341982
    Abstract: 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: Application
    Filed: April 12, 2024
    Publication date: October 17, 2024
    Applicant: Terumo Corporation
    Inventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
  • Patent number: 12076260
    Abstract: 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: Grant
    Filed: June 24, 2020
    Date of Patent: September 3, 2024
    Assignee: MicroVention, Inc.
    Inventors: Ponaka Pung, Helen Nguyen
  • Publication number: 20240238110
    Abstract: 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: Application
    Filed: May 18, 2022
    Publication date: July 18, 2024
    Applicant: MicroVention, Inc.
    Inventors: Dieter Rutzen, Ponaka Pung, Shameem Golshan, Helen Nguyen, Oanh Nguyen, Britney Ngo, Minh Nguyen, Marcus Kraus, Nazanin Nourani
  • Publication number: 20240173155
    Abstract: 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: Application
    Filed: February 8, 2024
    Publication date: May 30, 2024
    Applicant: MicroVention, Inc.
    Inventors: Ponaka Pung, Tai D. Tieu, Ross Soltanian, Helen Nguyen, Oanh Nguyen, Britney Ngo
  • Patent number: 11980554
    Abstract: 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: Grant
    Filed: July 19, 2021
    Date of Patent: May 14, 2024
    Assignee: Terumo Corporation
    Inventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
  • Publication number: 20240108352
    Abstract: 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: Application
    Filed: December 13, 2023
    Publication date: April 4, 2024
    Applicant: MicroVention, Inc.
    Inventors: Tai D. Tieu, Hideo Morita, Helen Nguyen
  • Patent number: 11931277
    Abstract: 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: Grant
    Filed: April 2, 2021
    Date of Patent: March 19, 2024
    Assignee: MicroVention, Inc.
    Inventors: Ponaka Pung, Tai D. Tieu, Ross Soltanian, Helen Nguyen, Oanh Nguyen, Britney Ngo
  • Patent number: 11857196
    Abstract: 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: Grant
    Filed: February 16, 2021
    Date of Patent: January 2, 2024
    Assignee: MicroVention, Inc.
    Inventors: Tai D. Tieu, Hideo Morita, Helen Nguyen
  • Publication number: 20230310185
    Abstract: 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: Application
    Filed: June 5, 2023
    Publication date: October 5, 2023
    Applicant: MicroVention, Inc.
    Inventors: Ponaka Pung, Helen Nguyen, Tai D. Tieu
  • Patent number: 11696843
    Abstract: 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: Grant
    Filed: September 15, 2020
    Date of Patent: July 11, 2023
    Assignee: MicroVention, Inc.
    Inventors: Ponaka Pung, Helen Nguyen, Tai D. Tieu
  • Patent number: 11351046
    Abstract: 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: Grant
    Filed: October 1, 2019
    Date of Patent: June 7, 2022
    Assignee: Terumo Corporation
    Inventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
  • Patent number: 11291566
    Abstract: 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: Grant
    Filed: April 29, 2021
    Date of Patent: April 5, 2022
    Assignee: Terumo Corporation
    Inventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
  • Publication number: 20210346181
    Abstract: 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: Application
    Filed: July 19, 2021
    Publication date: November 11, 2021
    Applicant: Terumo Corporation
    Inventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
  • Publication number: 20210244552
    Abstract: 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: Application
    Filed: April 29, 2021
    Publication date: August 12, 2021
    Applicant: Terumo Corporation
    Inventors: Tai D. Tieu, Gregory M. Cruise, Heather Griffith, Helen Nguyen, Minh Nguyen, Ponaka Pung, Shirley Vong
  • Publication number: 20210220158
    Abstract: 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: Application
    Filed: April 2, 2021
    Publication date: July 22, 2021
    Applicant: MicroVention, Inc.
    Inventors: Ponaka Pung, Tai D. Tieu, Ross Soltanian, Helen Nguyen, Oanh Nguyen, Britney Ngo
  • Publication number: 20210161539
    Abstract: 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: Application
    Filed: February 16, 2021
    Publication date: June 3, 2021
    Applicant: MicroVention, Inc.
    Inventors: Tai D. Tieu, Hideo Morita, Helen Nguyen
  • Patent number: 11000394
    Abstract: 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: Grant
    Filed: January 10, 2019
    Date of Patent: May 11, 2021
    Assignee: MicroVention, Inc.
    Inventors: Ponaka Pung, Tai D. Tieu, Ross Soltanian, Helen Nguyen, Oanh Nguyen, Britney Ngo
  • Publication number: 20210030570
    Abstract: 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: Application
    Filed: September 15, 2020
    Publication date: February 4, 2021
    Applicant: MicroVention, Inc.
    Inventors: Ponaka Pung, Helen Nguyen, Tai D. Tieu