Patents by Inventor Larry J. Kovach

Larry J. Kovach 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: 10568752
    Abstract: A medical assembly includes a balloon expandable endoprosthesis comprising a plurality of ringed stent elements flexibly connected to each other via at least one flexible connector, the endoprosthesis being deployable from an undeployed state with an undeployed diameter to a deployed state with a deployed diameter. The medical assembly further includes a catheter assembly comprising a balloon, and a cover along the balloon. The endoprosthesis is coaxially located about the balloon and the cover. One or more portions of the balloon and the cover reach an intermediate diameter between the undeployed diameter and the deployed diameter in which the portions of the balloon and the cover are inflated by increasing an inflation pressure within the balloon and approximately maintained at about the intermediate diameter until the inflation pressure increases by at least 1 atmosphere to overcome a yield strength of the cover.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: February 25, 2020
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Larry J. Kovach, Joseph B. Koenig
  • Publication number: 20190388252
    Abstract: An open stent (a stent having open space through its thickness at locations between the ends of the stent), incorporating flexible, preferably polymeric, connecting elements into the stent wherein these elements connect adjacent, spaced-apart stent elements. Preferably the spaced-apart adjacent stent elements are the result of forming the stent from a helically wound serpentine wire having space provided between adjacent windings. Other stent forms such as multiple, individual spaced-apart ring-shaped or interconnected stent elements may also be used. The connecting elements are preferably longitudinally oriented.
    Type: Application
    Filed: September 4, 2019
    Publication date: December 26, 2019
    Inventors: Joseph R. Armstrong, Edward H. Cully, Mark Y. Hansen, Brian L. Johnson, Bret J. Kilgrow, Larry J. Kovach, James D. Silverman
  • Patent number: 10456281
    Abstract: An open stent (a stent having open space through its thickness at locations between the ends of the stent), incorporating flexible, preferably polymeric, connecting elements into the stent wherein these elements connect adjacent, spaced-apart stent elements. Preferably the spaced-apart adjacent stent elements are the result of forming the stent from a helically wound serpentine wire having space provided between adjacent windings. Other stent forms such as multiple, individual spaced-apart ring-shaped or interconnected stent elements may also be used. The connecting elements are preferably longitudinally oriented.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: October 29, 2019
    Assignee: W.L. Gore & Associates, Inc.
    Inventors: Joseph R. Armstrong, Edward H. Cully, Mark Y. Hansen, Brian L. Souter, Bret J. Kilgrow, Larry J. Kovach, James D. Silverman
  • Publication number: 20190167459
    Abstract: The present disclosure includes an endoprosthesis delivery system comprising an elongate member, such as a catheter, an endoprosthesis, and an end cap having one or more protrusions extending therefrom. The protrusions may assist in retraction of end cap into an outer sheath, such as an introducer sheath. In some examples, the protrusion includes fins. In some embodiments, the endoprosthesis delivery system further includes a covering member disposed about the endoprosthesis. The protrusions may support the covering member, which may extend beyond the distal end of the endoprosthesis and onto the end cap. In some embodiments, the end cap comprises a tapered profile, which may assist in retraction of the catheter tip and end cap into an outer sheath.
    Type: Application
    Filed: February 4, 2019
    Publication date: June 6, 2019
    Inventors: Bret J. Kilgrow, Larry J. Kovach, Brandon C. Short, Anna F. Timbie
  • Publication number: 20190133750
    Abstract: A vascular graft incorporating a stent into a portion of its length. While various materials may be used for the vascular graft, the graft is preferably an ePTFE graft. The stent is preferably a self-expanding stent, although it may alternatively be a balloon expandable stent. The vascular graft preferably has a continuous inner tubular liner that extends between the opposing ends of the graft and provides a continuous luminal surface for blood contact that is uninterrupted by seams or joints. The length portion of the graft that does not include the stent has a greater wall thickness than does the portion including the stent.
    Type: Application
    Filed: September 7, 2018
    Publication date: May 9, 2019
    Inventors: Edward H. Cully, Deenu Kanjickal, Bret J. Kilgrow, Larry J. Kovach, Timothy T. Stringer
  • Patent number: 10195064
    Abstract: The present disclosure includes an endoprosthesis delivery system comprising an elongate member, such as a catheter, an endoprosthesis, a covering member disposed about the endoprosthesis, a tip, and an end cap. The tip and end cap can be integral to each other. The covering member can extend beyond the distal end of the endoprosthesis and onto the end cap. The end cap can comprise a tapered profile, which may assist in retraction of the catheter tip and end cap into an outer sheath. The end cap can further comprise one or more fins.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: February 5, 2019
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Bret J. Kilgrow, Larry J. Kovach, Brandon C. Short, Anna F. Timbie
  • Patent number: 10080643
    Abstract: A vascular graft incorporating a stent into a portion of its length. While various materials may be used for the vascular graft, the graft is preferably an ePTFE graft. The stent is preferably a self-expanding stent, although it may alternatively be a balloon expandable stent. The vascular graft preferably has a continuous inner tubular liner that extends between the opposing ends of the graft and provides a continuous luminal surface for blood contact that is uninterrupted by seams or joints. The length portion of the graft that does not include the stent has a greater wall thickness than does the portion including the stent.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: September 25, 2018
    Assignee: W. L. Gore Associates, Inc.
    Inventors: Edward H. Cully, Deenu Kanjickal, Bret J. Kilgrow, Larry J. Kovach, Timothy T. Stringer
  • Patent number: 9987395
    Abstract: Articles comprising an expanded polytetrafluoroethylene membrane having serpentine fibrils and having a discontinuous coating of a fluoropolymer thereon are provided. The fluoropolymer may be located at least partially in the pores of the expanded fluoropolymer membrane. In exemplary embodiments, the fluoropolymer is fluorinated ethylene propylene. The application of a tensile force at least partially straightens the serpentine fibrils, thereby elongating the article. The expanded polytetrafluoroethylene membrane may include a microstructure of substantially only fibrils. The articles can be elongated to a predetermined point at which further elongation is inhibited by a dramatic increase in stiffness. In one embodiment, the articles are used to form a covered stent device that requires little force to distend in the radial direction to a first diameter but is highly resistant to further distension to a second diameter (stop point).
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: June 5, 2018
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Larry J Kovach, Rachel Radspinner
  • Publication number: 20180116842
    Abstract: The present disclosure includes an endoprosthesis delivery system comprising an elongate member, such as a catheter, an endoprosthesis, a covering member disposed about the endoprosthesis, and at least one flexible element situated between the endoprosthesis and the covering member. The covering member can extend beyond an end of the endoprosthesis. In operation, as the covering member is removed, the flexible element can guide the covering member over the end of the endoprosthesis to prevent entanglement between the end of the endoprosthesis and the covering member.
    Type: Application
    Filed: December 27, 2017
    Publication date: May 3, 2018
    Inventors: Joseph R. Armstrong, Edward H. Cully, Jeffrey B. Duncan, Larry J. Kovach, Douglas F. Pajot, Brandon C. Short, Mark J. Ulm, Michael J. Vonesh
  • Publication number: 20180049898
    Abstract: An open stent (a stent having open space through its thickness at locations between the ends of the stent), incorporating flexible, preferably polymeric, connecting elements into the stent wherein these elements connect adjacent, spaced-apart stent elements. Preferably the spaced-apart adjacent stent elements are the result of forming the stent from a helically wound serpentine wire having space provided between adjacent windings. Other stent forms such as multiple, individual spaced-apart ring-shaped or interconnected stent elements may also be used. The connecting elements are preferably longitudinally oriented.
    Type: Application
    Filed: March 9, 2017
    Publication date: February 22, 2018
    Inventors: Joseph R. Armstrong, Edward H. Cully, Mark Y. Hansen, Brian L. Johnson, Bret J. Kilgrow, Larry J. Kovach, James D. Silverman
  • Patent number: 9855160
    Abstract: The present disclosure includes an endoprosthesis delivery system comprising an elongate member, such as a catheter, an endoprosthesis, a covering member disposed about the endoprosthesis, and at least one flexible element situated between the endoprosthesis and the covering member. The covering member can extend beyond an end of the endoprosthesis. In operation, as the covering member is removed, the flexible element can guide the covering member over the end of the endoprosthesis to prevent entanglement between the end of the endoprosthesis and the covering member.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: January 2, 2018
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Joseph R. Armstrong, Edward H. Cully, Jeffrey B. Duncan, Larry J. Kovach, Douglas F. Pajot, Brandon C. Short, Mark J. Ulm, Michael J. Vonesh
  • Publication number: 20170340464
    Abstract: A medical assembly includes a balloon expandable endoprosthesis comprising a plurality of ringed stent elements flexibly connected to each other via at least one flexible connector, the endoprosthesis being deployable from an undeployed state with an undeployed diameter to a deployed state with a deployed diameter. The medical assembly further includes a catheter assembly comprising a balloon, and a cover along the balloon. The endoprosthesis is coaxially located about the balloon and the cover. One or more portions of the balloon and the cover reach an intermediate diameter between the undeployed diameter and the deployed diameter in which the portions of the balloon and the cover are inflated by increasing an inflation pressure within the balloon and approximately maintained at about the intermediate diameter until the inflation pressure increases by at least 1 atmosphere to overcome a yield strength of the cover.
    Type: Application
    Filed: May 25, 2016
    Publication date: November 30, 2017
    Inventors: Larry J. Kovach, Joseph B. Koenig
  • Patent number: 9622888
    Abstract: An open stent (a stent having open space through its thickness at locations between the ends of the stent), incorporating flexible, preferably polymeric, connecting elements into the stent wherein these elements connect adjacent, spaced-apart stent elements. Preferably the spaced-apart adjacent stent elements are the result of forming the stent from a helically wound serpentine wire having space provided between adjacent windings. Other stent forms such as multiple, individual spaced-apart ring-shaped or interconnected stent elements may also be used. The connecting elements are preferably longitudinally oriented.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: April 18, 2017
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Joseph R. Armstrong, Edward H. Cully, Mark Y. Hansen, Brian L. Johnson, Bret J. Kilgrow, Larry J. Kovach, James D. Silverman
  • Publication number: 20170065747
    Abstract: Articles comprising an expanded polytetrafluoroethylene membrane having serpentine fibrils and having a discontinuous coating of a fluoropolymer thereon are provided. The fluoropolymer may be located at least partially in the pores of the expanded fluoropolymer membrane. In exemplary embodiments, the fluoropolymer is fluorinated ethylene propylene. The application of a tensile force at least partially straightens the serpentine fibrils, thereby elongating the article. The expanded polytetrafluoroethylene membrane may include a microstructure of substantially only fibrils. The articles can be elongated to a predetermined point at which further elongation is inhibited by a dramatic increase in stiffness. In one embodiment, the articles are used to form a covered stent device that requires little force to distend in the radial direction to a first diameter but is highly resistant to further distension to a second diameter (stop point).
    Type: Application
    Filed: November 2, 2016
    Publication date: March 9, 2017
    Inventors: Larry J. Kovach, Rachel Radspinner
  • Patent number: 9522072
    Abstract: Articles made of a porous material having a fibrillar microstructure of bent fibrils and provided with a fracturable coating whereby the physical size of the article may be changed by the application of force to the article in a direction substantially parallel to a direction of orientation of the fibrils. The application of a tensile force to such an article in a direction substantially parallel to orientation of the bent fibrils results in fracturing of the fracturable material and straightening of the bent fibrils. Methods of making such articles are also described. The articles may include implantable articles such as vascular grafts and stent-grafts; such devices may, for example, be forcibly increased in diameter or in length wherein the force results in fracturing of the coating. One such coated material is porous expanded polytetrafluoroethylene provided with a coating of fluorinated ethylene propylene.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: December 20, 2016
    Assignee: W. L. Gore & Associates, Inc.
    Inventor: Larry J. Kovach
  • Patent number: 9510935
    Abstract: Articles comprising an expanded polytetrafluoroethylene membrane having serpentine fibrils and having a discontinuous coating of a fluoropolymer thereon are provided. The fluoropolymer may be located at least partially in the pores of the expanded fluoropolymer membrane. In exemplary embodiments, the fluoropolymer is fluorinated ethylene propylene. The application of a tensile force at least partially straightens the serpentine fibrils, thereby elongating the article. The expanded polytetrafluoroethylene membrane may include a microstructure of substantially only fibrils. The articles can be elongated to a predetermined point at which further elongation is inhibited by a dramatic increase in stiffness. In one embodiment, the articles are used to form a covered stent device that requires little force to distend in the radial direction to a first diameter but is highly resistant to further distension to a second diameter (stop point).
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: December 6, 2016
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Larry J Kovach, Rachel Radspinner
  • Patent number: 9445887
    Abstract: Articles comprising an expanded polytetrafluoroethylene membrane having serpentine fibrils and having a discontinuous coating of a fluoropolymer thereon are provided. The fluoropolymer may be located at least partially in the pores of the expanded fluoropolymer membrane. In exemplary embodiments, the fluoropolymer is fluorinated ethylene propylene. The application of a tensile force at least partially straightens the serpentine fibrils, thereby elongating the article. The expanded polytetrafluoroethylene membrane may include a microstructure of substantially only fibrils. The articles can be elongated to a predetermined point at which further elongation is inhibited by a dramatic increase in stiffness. In one embodiment, the articles are used to form a covered stent device that requires little force to distend in the radial direction to a first diameter but is highly resistant to further distension to a second diameter (stop point).
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: September 20, 2016
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Larry J Kovach, Rachel Radspinner
  • Publication number: 20160235518
    Abstract: A vascular graft incorporating a stent into a portion of its length. While various materials may be used for the vascular graft, the graft is preferably an ePTFE graft. The stent is preferably a self-expanding stent, although it may alternatively be a balloon expandable stent. The vascular graft preferably has a continuous inner tubular liner that extends between the opposing ends of the graft and provides a continuous luminal surface for blood contact that is uninterrupted by seams or joints. The length portion of the graft that does not include the stent has a greater wall thickness than does the portion including the stent.
    Type: Application
    Filed: February 25, 2016
    Publication date: August 18, 2016
    Inventors: Edward H. Cully, Deenu Kanjickal, Bret J. Kilgrow, Larry J. Kovach, Timothy T. Stringer
  • Patent number: 9295542
    Abstract: A vascular graft incorporating a stent into a portion of its length. While various materials may be used for the vascular graft, the graft is preferably an ePTFE graft. The stent is preferably a self-expanding stent, although it may alternatively be a balloon expandable stent. The vascular graft preferably has a continuous inner tubular liner that extends between the opposing ends of the graft and provides a continuous luminal surface for blood contact that is uninterrupted by seams or joints. The length portion of the graft that does not include the stent has a greater wall thickness than does the portion including the stent.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: March 29, 2016
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Edward H. Cully, Deenu Kanjickal, Bret J. Kilgrow, Larry J. Kovach, Timothy T. Stringer
  • Publication number: 20160045349
    Abstract: The present disclosure includes an endoprosthesis delivery system comprising an elongate member, such as a catheter, an endoprosthesis, a covering member disposed about the endoprosthesis, a tip, and an end cap. The tip and end cap can be integral to each other. The covering member can extend beyond the distal end of the endoprosthesis and onto the end cap. The end cap can comprise a tapered profile, which may assist in retraction of the catheter tip and end cap into an outer sheath. The end cap can further comprise one or more fins.
    Type: Application
    Filed: August 13, 2015
    Publication date: February 18, 2016
    Inventors: Bret J. Kilgrow, Larry J. Kovach, Brandon C. Short, Anna F. Timbie