Patents by Inventor Darin G. Schaeffer
Darin G. Schaeffer 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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Publication number: 20110015725Abstract: A coated medical device (10) including a structure (12) adapted for introduction into a passage or vessel of a patient. The structure is formed of preferably a non-porous base material (14) having a bioactive material layer (18) disposed thereon. The medical device is preferably an implantable stent or balloon (26) of which the bioactive material layer is deposited thereon. The stent can be positioned around the balloon and another layer of the bioactive material posited over the entire structure and extending beyond the ends of the positioned stent. The ends of the balloon extend beyond the ends of the stent and include the bioactive material thereon for delivering the bioactive material to the cells of a vessel wall coming in contact therewith. The balloon further includes a layer of hydrophilic material (58) positioned between the base and bioactive material layers of the balloon.Type: ApplicationFiled: September 28, 2010Publication date: January 20, 2011Inventors: Brian L. Bates, Scott E. Boatman, David G. Burton, Michael C. Hoffa, Darin G. Schaeffer, Jason S. Sturgeon, Anthony O. Ragheb
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Publication number: 20100331817Abstract: The present disclosure generally provides a multiple balloon assembly used as part of the distal region of a medical device that is capable of delivering a therapeutic agent into a body vessel having bodily fluid. The multiple balloon assembly comprises an inner balloon and an outer balloon. The outer balloon further comprises a proximal taper region, a middle region, and a distal taper region. The inflation of the inner balloon causes the middle region of the outer balloon to contact the inner wall of the body vessel, thereby, occluding the flow of fluid through the body vessel. The proximal taper region and the distal taper region are configured such that they do not touch the inner wall of the body vessel. One of the distal taper and proximal taper regions has a plurality of apertures configured to allow for the therapeutic agent to be delivered into the body vessel at a predetermined rate.Type: ApplicationFiled: June 29, 2010Publication date: December 30, 2010Applicant: Cook IncorporatedInventors: Darin G. Schaeffer, William F. Moore
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Patent number: 7857786Abstract: The present invention provides apparatus and methods for facilitating folding of a balloon before, during or after a medical procedure. In a first embodiment, the apparatus generally comprises at least one catheter shaft member, a balloon disposed on a distal region of the catheter shaft member, and at least one folding member disposed along at least a proximal region of the balloon. The folding member may comprise at least one radially-outward projecting member integrally formed with or attached to the balloon, or an internally-formed groove in the balloon, which is adapted to promote twisting of the balloon to reduce the profile of the balloon in the deflated state. Optionally, biasing members may be disposed between the folding member and an adjacent portion of the balloon to promote folding of the balloon in a clockwise or counter-clockwise direction.Type: GrantFiled: October 29, 2007Date of Patent: December 28, 2010Assignees: Cook Incorporated, Sabin CorporationInventors: David G. Burton, David A. Drewes, Jr., Eric R. Hennessy, Darin G. Schaeffer
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Patent number: 7803149Abstract: A coated medical device (10) including a structure (12) adapted for introduction into a passage or vessel of a patient. The structure is formed of preferably a non-porous base material (14) having a bioactive material layer (18) disposed thereon. The medical device is preferably an implantable stent or balloon (26) of which the bioactive material layer is deposited thereon. The stent can be positioned around the balloon and another layer of the bioactive material posited over the entire structure and extending beyond the ends of the positioned stent. The ends of the balloon extend beyond the ends of the stent and include the bioactive material thereon for delivering the bioactive material to the cells of a vessel wall coming in contact therewith. The balloon further includes a layer of hydrophilic material (58) positioned between the base and bioactive material layers of the balloon.Type: GrantFiled: July 14, 2003Date of Patent: September 28, 2010Assignee: Cook IncorporatedInventors: Brian L. Bates, Scott E. Boatman, David G. Burton, Michael C. Hoffa, Darin G. Schaeffer, Jason S. Sturgeon, Anthony O. Ragheb
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Patent number: 7799201Abstract: An electropolishing apparatus and method are provided for polishing stents and other medical implants. The apparatus includes a motor that rotates a roller. The roller continuously rotates the medical implant to be electropolished. One of the advantages of the apparatus and method is that marks generated around the electrical contact between the anode and the medical implant are minimized. In addition, the medical implant is polished more evenly than conventional electropolishing systems.Type: GrantFiled: March 26, 2010Date of Patent: September 21, 2010Assignee: Cook IncorporatedInventors: Darin G. Schaeffer, Randy Joe Myers
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Patent number: 7799183Abstract: An electropolishing apparatus and method are provided for polishing stents and other medical implants. The apparatus includes a motor that rotates a roller. The roller continuously rotates the medical implant to be electropolished. One of the advantages of the apparatus and method is that marks generated around the electrical contact between the anode and the medical implant are minimized. In addition, the medical implant is polished more evenly than conventional electropolishing systems.Type: GrantFiled: May 11, 2007Date of Patent: September 21, 2010Assignee: Cook IncorporatedInventors: Darin G. Schaeffer, Randy Joe Myers
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Publication number: 20100198254Abstract: A device for closure of an opening formed through a wall of a body vessel of a patient is provided, as well as an introducer system for delivery of the closure device. Various embodiments include the closure device having hook members configured to engage the tissue interior of the body vessel wall, hook members configured to engage interstitial tissue adjacent to the body vessel, a plug member to contact sealably the opening from inside the body vessel, and combinations thereof. A retraction member is removably attached to the each of the embodiments to permit manipulation of the device. Remodelable material may be included with each of the embodiments to promote quicker healing. The introducer includes a sheath that is insertable through the opening and a pusher disposed within the lumen of the sheath and movable within the sheath lumen to deploy the device.Type: ApplicationFiled: January 30, 2009Publication date: August 5, 2010Applicant: Cook IncorporatedInventor: Darin G. Schaeffer
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Publication number: 20100181206Abstract: An electropolishing apparatus and method are provided for polishing stents and other medical implants. The apparatus includes a motor that rotates a roller. The roller continuously rotates the medical implant to be electropolished. One of the advantages of the apparatus and method is that marks generated around the electrical contact between the anode and the medical implant are minimized. In addition, the medical implant is polished more evenly than conventional electropolishing systems.Type: ApplicationFiled: March 26, 2010Publication date: July 22, 2010Applicant: Cook IncorporatedInventors: Darin G. Schaeffer, Randy Joe Myers
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Patent number: 7731685Abstract: A coated medical device adapted for introduction into a passage or vessel of a patient is provided. The medical device is preferably an implantable balloon with a bioactive deposited or within the balloon. The balloon can further include a hydrophilic material positioned between the balloon and a bioactive material posited on the balloon.Type: GrantFiled: September 23, 2005Date of Patent: June 8, 2010Assignees: Cook Incorporated, MED Institute, Inc.Inventors: Anthony O. Ragheb, Brian L. Bates, Scott E. Boatman, David G. Burton, Michael C. Hoffa, Darin G. Schaeffer, Jason S. Sturgeon
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Publication number: 20100131055Abstract: An expandable venous valve having a support structure configured to enlarge the area adjacent the valve structure. The enlarged pocket areas can be created by forming an artificial sinus adjacent the valve structure in an unsupported section of vessel wall between two support frame sections.Type: ApplicationFiled: November 9, 2009Publication date: May 27, 2010Applicant: COOK INCORPORATEDInventors: Brian C. Case, Michael L. Garrison, Andrew Hoffa, Darin G. Schaeffer, Jacob A. Flagle
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Patent number: 7708931Abstract: An balloon catheter is provided with an improved neck portion. The neck portion of the balloon is used to attach the end of the balloon to a catheter. Before attaching the balloon to the catheter, the neck portion is lengthened and thinned out to make the neck portion more flexible. Heat shrink tubing may be used to apply pressure to the neck portion to force the material of the neck portion to flow along a mandrel inserted into the neck portion.Type: GrantFiled: September 20, 2007Date of Patent: May 4, 2010Assignee: Cook IncorporatedInventors: Darin G. Schaeffer, David G. Burton
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Publication number: 20100063576Abstract: An endoluminal prosthesis with a moveable fenestration including a tubular graft body having a proximal end, a distal end, a surface plane at least one fenestration having a perimeter disposed in a sidewall of the tubular body between the proximal end and the distal end, a first biocompatible graft material, and a second biocompatible graft material adjacent to and surrounding the perimeter of the at least one fenestration. The second biocompatible graft material has at least one characteristic different from the first biocompatible graft material and is more flexible than the first biocompatible graft material and is movable relative to the surface plane of the tubular graft body.Type: ApplicationFiled: August 26, 2009Publication date: March 11, 2010Applicant: Cook IncorporatedInventors: Darin G. Schaeffer, Shyam Kuppurathanam
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Publication number: 20100057191Abstract: An valve prosthesis, such as an artificial venous valve, having a support frame and leaf structure comprising one or more leaflets in which the outer edge of each leaflet engages the inner circumference of the bodily passageway along a serpentine path urged against the passageway by an expandable frame, while the inner edges move in response to fluid to restrict retrograde flow. Optionally, one or more elements can extend from the support frame/leaf structure to provide centering support and/or protection from the leaflet adhering to the vessel wall. In one embodiment, the centering support structure comprises a second or third expandable frames attached to and extending from the proximal and/or distal ends of main valve structure and support frame. In another embodiment, one or more support elements extend outward from the valve support frame to engage the vessel wall to provide greater longitudinal stability.Type: ApplicationFiled: October 7, 2009Publication date: March 4, 2010Inventors: DUSAN PAVCNIK, THOMAS A. OSBORNE, BRIAN C. CASE, JACOB A. FLAGLE, MICHAEL L. GARRISON, RAM H. PAUL, JR., ANDREW K. HOFFA, RAYMOND B. LEONARD, II, DARIN G. SCHAEFFER, RICHARD B. SISKEN
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Patent number: 7670369Abstract: An endoluminal prosthesis is disclosed and comprises a first generally tubular stent, a second generally tubular stent, and a generally tubular graft member concentrically disposed between the first and second stents. One or more of the first and second stents may have a body portion and a flaring portion. The first and second stents each may have a recoil force such that the combined application of the first and second recoil forces secures the graft member between the first and second stents.Type: GrantFiled: October 10, 2006Date of Patent: March 2, 2010Assignee: Cook IncorporatedInventor: Darin G. Schaeffer
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Publication number: 20100023110Abstract: An endoluminal prosthesis is disclosed and comprises a first generally tubular stent, a second generally tubular stent, and a generally tubular graft member concentrically disposed between the first and second stents. One or more of the first and second stents may have a body portion and a flaring portion. The first and second stents each may have a recoil force such that the combined application of the first and second recoil forces secures the graft member between the first and second stents.Type: ApplicationFiled: July 23, 2009Publication date: January 28, 2010Applicant: Cook IncorporatedInventor: Darin G. Schaeffer
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Patent number: 7628803Abstract: An valve prosthesis, such as an artificial venous valve, having a support frame and leaf structure comprising one or more leaflets in which the outer edge of each leaflet engages the inner circumference of the bodily passageway along a serpentine path urged against the passageway by an expandable frame, while the inner edges move in response to fluid to restrict retrograde flow. Optionally, one or more elements can extend from the support frame/leaf structure to provide centering support and/or protection from the leaflet adhering to the vessel wall. In one embodiment, the centering support structure comprises a second or third expandable frames attached to and extending from the proximal and/or distal ends of main valve structure and support frame. In another embodiment, one or more support elements extend outward from the valve support frame to engage the vessel wall to provide greater longitudinal stability.Type: GrantFiled: August 15, 2003Date of Patent: December 8, 2009Assignees: Cook Incorporated, Oregon Health Science UniversityInventors: Dusan Pavcnik, Thomas A. Osborne, Brian C. Case, Jacob A. Flagle, Michael L. Garrison, Andrew K. Hoffa, Raymond B. Leonard, II, Darin G. Schaeffer, Richard B. Sisken
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Patent number: 7618447Abstract: An expandable venous valve having a support structure that configured to enlarge the area adjacent to the valve structure such that the flow patterns of retrograde flow are modified in a way that facilitates the flushing of the pockets at the base of the valve area to prevent stagnation of bodily fluid, which in the venous system, can lead to thrombus formation. The enlarged pocket areas can be created by forming an artificial sinus adjacent the valve structure in an unsupported section of vessel wall between two support frame section or the support frame can comprise an expanded-diameter intermediate or proximal section that forms an artificial sinus adjacent the valve structure.Type: GrantFiled: August 30, 2004Date of Patent: November 17, 2009Assignee: Cook IncorporatedInventors: Brian C. Case, Jacob A. Flagle, Andrew K. Hoffa, Darin G. Schaeffer, Michael L. Garrison
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Publication number: 20090277385Abstract: A coating can be applied to an endolumenal wall of a medical device by positioning an optical fiber within the lumen, providing a photo-activated chemical to contact the endolumenal wall, supplying the optical fiber with radiation capable of activating the chemical within the lumen, and withdrawing the optical fiber from the lumen at a controlled rate while the radiation is being emitted from the optical fiber to activate the chemical in close proximity to the endolumenal wall.Type: ApplicationFiled: July 16, 2009Publication date: November 12, 2009Applicant: Cook IncorporatedInventors: Brian C. Case, Darin G. Schaeffer
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Patent number: 7604661Abstract: An valve prosthesis, such as an artificial venous valve, having a support frame and leaf structure comprising one or more leaflets in which the outer edge of each leaflet engages the inner circumference of the bodily passageway along a serpentine path urged against the passageway by an expandable frame, while the inner edges move in response to fluid to restrict retrograde flow. Optionally, one or more elements can extend from the support frame/leaf structure to provide centering support and/or protection from the leaflet adhering to the vessel wall. In one embodiment, the centering support structure comprises a second or third expandable frames attached to and extending from the proximal and/or distal ends of main valve structure and support frame. In another embodiment, one or more support elements extend outward from the valve support frame to engage the vessel wall to provide greater longitudinal stability.Type: GrantFiled: October 31, 2007Date of Patent: October 20, 2009Assignees: Cook Incorporated, William Cook Europe ApS, MED Institute, Oregon Health Sciences UniversityInventors: Dusan Pavcnik, Thomas A. Osborne, Brian C. Case, Jacob A. Flagle, Michael L. Garrison, Ram H. Paul, Jr., Andrew K. Hoffa, Raymond B. Leonard, II, Darin G. Schaeffer, Richard B. Sisken
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Patent number: 7604830Abstract: A coating can be applied to an endolumenal wall of a medical device by positioning an optical fiber within the lumen, providing a photo-activated chemical to contact the endolumenal wall, supplying the optical fiber with radiation capable of activating the chemical within the lumen, and withdrawing the optical fiber from the lumen at a controlled rate while the radiation is being emitted from the optical fiber to activate the chemical in close proximity to the endolumenal wall.Type: GrantFiled: June 23, 2005Date of Patent: October 20, 2009Assignee: Cook IncorporatedInventors: Brian C. Case, Darin G. Schaeffer