Patents by Inventor Krzysztof Sowinski

Krzysztof Sowinski 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: 20090048657
    Abstract: The ePTFE structure has a node and fibril micro-structure. The ePTFE structure includes first and second regions each of which has a corresponding density. The density of the first region is different from the density of the second region.
    Type: Application
    Filed: August 15, 2007
    Publication date: February 19, 2009
    Inventors: Julio Duran, Jamie S. Henderson, Krzysztof Sowinski
  • Publication number: 20090048658
    Abstract: The ePTFE structure includes an ePTFE tubular structure having opposite ends and a longitudinal axis. The ePTFE tubular structure is formed from rotating the opposite ends relative to one another in a direction of rotation about the longitudinal axis. The ePTFE tubular structure has a node and fibril micro-structure in which substantially all of the fibrils are oriented in the direction of rotation.
    Type: Application
    Filed: August 15, 2007
    Publication date: February 19, 2009
    Inventors: Julio Duran, Krzysztof Sowinski, Jamie S. Henderson
  • Publication number: 20080103587
    Abstract: Methods of making multi-furcated grafts and, more particularly, a bifurcated graft from at least one ePTFE member are provided. Also provided are grafts made according to such methods.
    Type: Application
    Filed: November 1, 2006
    Publication date: May 1, 2008
    Inventors: Jamie Henderson, Krzysztof Sowinski, Ronald Rakos
  • Patent number: 7364587
    Abstract: A method for providing dilation resistance to an implantable tubular graft includes the steps of (a) providing a graft having opposed open ends and a textile wall extending in a lengthwise direction therebetween defining a graft diameter, wherein the textile wall has radially extending yarns having a radial extent which inter-engage longitudinally extending yarns having a longitudinal extent to define a textile pattern and further wherein the radially extending yarns are obliquely oriented to the lengthwise direction of the graft, thereby defining a first acute angle from the lengthwise direction of the graft; (b) providing an elongate tubular mandrel having a diameter which differs from the graft diameter by a factor of at least 1.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: April 29, 2008
    Assignee: Scimed Life Systems, Inc.
    Inventors: Jerry Q. Dong, John Spiridigloizzi, Ronald Rakos, Krzysztof Sowinski, William Quinn
  • Publication number: 20070244539
    Abstract: An implantable microporous ePTFE tubular vascular graft exhibits long term patency, superior radial tensile strength and suture hole elongation resistance. The graft includes a first ePTFE tube and a second ePTFE tube circumferentially disposed over the first tube. The first ePTFE tube exhibits a porosity sufficient to promote cell endothelization, tissue ingrowth and healing. The second ePTFE tube exhibits enhanced radial strength in excess of the radial tensile strength of the first tube.
    Type: Application
    Filed: June 7, 2007
    Publication date: October 18, 2007
    Inventors: David Lentz, Jamie Henderson, Edward Dormier, Richard Zdrahala, Gary Loomis, Ronald Rakos, Krzysztof Sowinski
  • Patent number: 7244271
    Abstract: An implantable microporous ePTFE tubular vascular graft exhibits long term patency, superior radial tensile strength and suture hole elongation resistance. The graft includes a first ePTFE tube and a second ePTFE tube circumferentially disposed over the first tube. The first ePTFE tube exhibits a porosity sufficient to promote cell endothelization, tissue ingrowth and healing. The second ePTFE tube exhibits enhanced radial strength in excess of the radial tensile strength of the first tube.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: July 17, 2007
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: David Lentz, Jamie Henderson, Edward Dormier, Richard Zdrahala, Gary Loomis, Ronald Rakos, Krzysztof Sowinski
  • Publication number: 20070078512
    Abstract: The vascular graft includes a conduit structure having outer and inner wall surfaces. The conduit structure includes a longitudinal central portion having a flexibility. The conduit structure further includes a pair of longitudinal intermediate portions each of which are integral with the central portion and located longitudinally such that the central portion is between the intermediate portions. The intermediate portions each have a flexibility which is less than the flexibility of the central portion.
    Type: Application
    Filed: October 5, 2005
    Publication date: April 5, 2007
    Inventors: Krzysztof Sowinski, Jamie Henderson
  • Publication number: 20060264138
    Abstract: A composite intraluminal prosthesis which is preferably used as a vascular prothesis includes a layer of ePTFE and a layer of textile material which are secured together by an elastomeric bonding agent. The ePTFE layer includes a porous microstructure defined by nodes interconnected by fibrils. The adhesive bonding agent is preferably applied in solution so that the bonding agent enters the pores of the microstructure of the ePTFE. This helps secure the textile layer to the ePTFE layer.
    Type: Application
    Filed: June 13, 2006
    Publication date: November 23, 2006
    Inventors: Krzysztof Sowinski, Ronald Rakos, Jerry Dong, Dennis Kujawski
  • Publication number: 20060259133
    Abstract: An elastomerically recoverable PTFE material is provided including a longitudinally compressed fibrils of ePTFE material penetrated by elastomeric material within the pores defining the elastomeric matrix. The elastomeric matrix and the compressed fibris cooperatively expand and recover without plastic deformation of the ePTFE material. The material may be used for various prosthesis, such as a vascular a prosthesis like a patch, a graft and an implantable tubular stent. Further, a method of producing the elastomerically recoverable PTFE material is provided herein.
    Type: Application
    Filed: May 9, 2006
    Publication date: November 16, 2006
    Inventors: Krzysztof Sowinski, Ronald Rakos
  • Publication number: 20060161245
    Abstract: An endoluminal device comprises at least a first member and a second member, which may be modular. The first member comprises a first trunk portion, a first midsection comprising a first opening, and a first leg portion. The second member comprises a second trunk portion, a second midsection comprising a second opening, and a second leg portion. The device has an assembled configuration in which the first member and second member are interlocked with one another with the second trunk portion coaxially contained within the first trunk portion, the second leg portion protruding through the first opening, and the second opening facing the first leg portion. The second midsection may have a leg stump portion that protrudes into the first leg portion of the first member in the assembled configuration. A system and method for deploying the device may use identical catheters for deploying the two members.
    Type: Application
    Filed: March 21, 2006
    Publication date: July 20, 2006
    Inventors: Ronald Rakos, Krzysztof Sowinski
  • Publication number: 20060147665
    Abstract: A method for making a vascular graft includes providing a PTFE green tube extrudate which is un-sintered, and then initially expanding the un-sintered extrudate to produce an initial node and fibril micro-structure therein. This is followed by heating the extrudate to raise the temperature thereof for a time period of sufficient duration such that the extrudate is partially sintered. The partially sintered extrudate is subsequently expanded to make the vascular graft. The subsequent expansion produces a subsequent node and fibril micro-structure in the vascular graft. An alternative method for making a vascular graft includes providing a PTFE green tube extrudate which is un-sintered, longitudinally expanding the un-sintered extrudate to form an ePTFE tube structure, and radially expanding the un-sintered ePTFE tube structure. ePTFE made according to the method is fabricated into various structures, such as tube structures, filament structures, and sheet structures.
    Type: Application
    Filed: December 31, 2004
    Publication date: July 6, 2006
    Inventors: Julio Duran, Krzysztof Sowinski
  • Publication number: 20060142852
    Abstract: A composite graft having a first seamless tubular layer comprising biocompatible first polymeric material and having a luminal surface and an exterior surface; a biocompatible reinforcing member arranged in a pattern to define a second tubular layer, the second tubular layer being disposed over the exterior surface of the first tubular layer; and a third seamless tubular layer comprising biocompatible second polymeric material and having a luminal surface and an exterior surface, the luminal surface of the third tubular layer being securably disposed over the second tubular and over the first tubular layer; wherein the tubular layers define a wall of the graft, the wall having a wall thickness of less than 0.1 mm. Desirably, the graft wall thickness is less than 0.05 mm.
    Type: Application
    Filed: December 29, 2004
    Publication date: June 29, 2006
    Applicant: Boston Scientific Scimed, Inc.
    Inventors: Krzysztof Sowinski, Jerry Dong
  • Patent number: 7029496
    Abstract: An endoluminal device comprises at least a first member and a second member, which may be modular. The first member comprises a first trunk portion, a first midsection comprising a first opening, and a first leg portion. The second member comprises a second trunk portion, a second midsection comprising a second opening, and a second leg portion. The device has an assembled configuration in which the first member and second member are interlocked with one another with the second trunk portion coaxially contained within the first trunk portion, the second leg portion protruding through the first opening, and the second opening facing the first leg portion. The second midsection may have a leg stump portion that protrudes into the first leg portion of the first member in the assembled configuration. A system and method for deploying the device may use identical catheters for deploying the two members.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: April 18, 2006
    Assignee: Scimed Life Systems, Inc.
    Inventors: Ronald Rakos, Krzysztof Sowinski
  • Publication number: 20060058862
    Abstract: A method for providing dilation resistance to an implantable tubular graft includes the steps of (a) providing a graft having opposed open ends and a textile wall extending in a lengthwise direction therebetween defining a graft diameter, wherein the textile wall has radially extending yarns having a radial extent which inter-engage longitudinally extending yarns having a longitudinal extent to define a textile pattern and further wherein the radially extending yarns are obliquely oriented to the lengthwise direction of the graft, thereby defining a first acute angle from the lengthwise direction of the graft; (b) providing an elongate tubular mandrel having a diameter which differs from the graft diameter by a factor of at least 1.
    Type: Application
    Filed: September 10, 2004
    Publication date: March 16, 2006
    Inventors: Jerry Dong, John Spiridigloizzi, Ronald Rakos, Krzysztof Sowinski, William Quinn
  • Publication number: 20050288768
    Abstract: A stent-graft is provided for defining a prosthetic fluid passage within a body lumen. The stent-graft includes a graft having a forward section, and a pilot stent located within the forward section of the graft. The pilot stent has an expanded diameter less than that of a lumen in which it is to be deployed to permit fluid flow within the lumen during deployment of the stent-graft. Means are provided for subsequently expanding the pilot stent and the graft to the full diameter of the lumen.
    Type: Application
    Filed: June 28, 2004
    Publication date: December 29, 2005
    Inventors: Krzysztof Sowinski, Ronald Rakos, Dennis Kujawski, Patrice Nazzaro
  • Publication number: 20050288767
    Abstract: The present invention provides an implantable graft that includes an elongate graft tube having opposing ends defining an attachment site for attaching the graft to a stent. The graft further includes a reinforcement member attached adjacent to at least one of the ends of the graft for establishing a reinforced attachment site for the graft, thereby preventing elongation of a suture hole in the material. Furthermore, the present invention provides a graft wherein at least one end of the graft is folded over itself and glued or sutured to itself and/or the stent, thereby forming a reinforcement thereto.
    Type: Application
    Filed: June 24, 2004
    Publication date: December 29, 2005
    Inventors: Dennis Kujawski, Ronald Rakos, Krzysztof Sowinski, Jerry Dong
  • Publication number: 20050240261
    Abstract: An implantable composite medical device having a longitudinal length a woven textile portion having yarns interlaced in a woven pattern, a knitted textile portion having yarns interlooped in a knitted pattern. The woven and knitted portions are securably attached to one and the other to provide a composite woven and knitted textile surface along the longitudinal length of the device. The woven portion may have a permeability from about 30 to about 500 ml/min/cm2, and the knitted portion may have a permeability from about 30 to about 15,000 ml/min/cm2. Further, a crimped woven portion with a resiliently longitudinal stretchability from about 10 to about 100 linear percent over its quiescent longitudinal dimension or an uncrimped woven portion with a resiliently longitudinal stretchability of less than about 10 linear percent over its quiescent longitudinal dimension are useful.
    Type: Application
    Filed: April 23, 2004
    Publication date: October 27, 2005
    Inventors: Ronald Rakos, Krzysztof Sowinski
  • Publication number: 20040193242
    Abstract: An implantable microporous ePTFE tubular vascular graft exhibits long term patency, superior radial tensile strength and suture hole elongation resistance. The graft includes a first ePTFE tube and a second ePTFE tube circumferentially disposed over the first tube. The first ePTFE tube exhibits a porosity sufficient to promote cell endothelization, tissue ingrowth and healing. The second ePTFE tube exhibits enhanced radial strength in excess of the radial tensile strength of the first tube.
    Type: Application
    Filed: April 9, 2004
    Publication date: September 30, 2004
    Applicant: Scimed Life Systems, Inc.
    Inventors: David Lentz, Jamie Henderson, Edward Dormier, Richard Zdrahala, Gary Loomis, Ronald Rakos, Krzysztof Sowinski
  • Publication number: 20040182511
    Abstract: A method of forming a composite textile and ePTFE implantable device includes the steps of (a) providing an ePTFE layer having opposed surfaces comprising a microporous structure of nodes interconnected by fibrils; (b) providing a textile layer having opposed surfaces; (c) applying a coating of an elastomeric bonding agent to one of the opposed surfaces of the ePTFE layer or the textile layer; (d) providing a hollow member having an open end and an opposed closed end defining a fluid passageway therebetween and having a wall portion with at least one hole extending therethrough, the hole being in fluid communication with the fluid passageway; (e) concentrically placing the ePTFE layer and the textile layer onto the hollow member and over the at least one hole of the hollow member to provide an interior composite layer and an exterior composite layer, thereby defining a composite assembly, wherein the interior composite layer is one of the ePTFE layer or the textile layer and the exterior composite layer is th
    Type: Application
    Filed: December 19, 2003
    Publication date: September 23, 2004
    Applicant: SCIMED Life Systems, Inc.
    Inventors: Ronald Rakos, Krzysztof Sowinski
  • Publication number: 20040162604
    Abstract: A method of making an ePTFE tubular structure includes the steps of
    Type: Application
    Filed: February 11, 2004
    Publication date: August 19, 2004
    Applicant: Boston Scientific Corp./ SCIMED Life Systems, Inc.
    Inventors: Krzysztof Sowinski, Jamie Henderson, Howard Wolek