Patents by Inventor Joseph Lessar
Joseph Lessar 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: 9056351Abstract: A stent and a method for manufacturing a stent are provided. The stent includes a first ring having a plurality of peaks and a plurality of valleys, a second ring having a plurality of peaks and a plurality of valleys, and a connector that connects one of the peaks of the first ring to one of the valleys of the second ring. The connected peak of the first ring includes a deformed portion that extends towards the connected valley of the second ring. The method includes forming a first ring having a plurality of peaks and a plurality of valleys, forming a second ring having a plurality of peaks and a plurality of valleys, deforming a portion of at least one of the peaks of the first ring, and connecting the deformed portion of the peak of the first ring to one of the valleys of the second ring.Type: GrantFiled: February 5, 2013Date of Patent: June 16, 2015Assignee: Medtronic Vascular, Inc.Inventors: Michael Krivoruchko, Joseph Lessar
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Patent number: 8911491Abstract: A stent graft extends in a flow lumen to span a defective portion of the flow lumen and seal the defective portion from further blood contact. The stent graft includes a pair of apertures, from which extensions project into the renal arteries to seal the passage of blood into the renal arteries from the abnormality. The apertures are larger than the opening of the renal arteries, such that the apertures need not be centered with the renal arteries to enable placement of the extensions. The aperture opening and side branch extensions contain hook and loop structures to provide a variably positionable seal of the aperture opening.Type: GrantFiled: September 2, 2005Date of Patent: December 16, 2014Assignee: Medtronic Vascular, Inc.Inventors: Curtis Hanson, Scott Cook, Joseph Lessar
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Publication number: 20080177376Abstract: A stent and a method for manufacturing a stent are provided. The stent includes a first ring having a plurality of peaks and a plurality of valleys, a second ring having a plurality of peaks and a plurality of valleys, and a connector that connects one of the peaks of the first ring to one of the valleys of the second ring. The connected peak of the first ring includes a deformed portion that extends towards the connected valley of the second ring. The method includes forming a first ring having a plurality of peaks and a plurality of valleys, forming a second ring having a plurality of peaks and a plurality of valleys, deforming a portion of at least one of the peaks of the first ring, and connecting the deformed portion of the peak of the first ring to one of the valleys of the second ring.Type: ApplicationFiled: January 18, 2007Publication date: July 24, 2008Applicant: Medtronic Vascular, Inc.Inventors: Michael Krivoruchko, Joseph Lessar
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Publication number: 20080119927Abstract: A biocompatible polymeric coating composition for a stent having biodegradable glass spheres housing a therapeutic agent. The biodegradable glass spheres provide controlled, sustained release of the therapeutic agent in vivo. The biocompatible polymeric coating may be prepared without the use of a co-solvent.Type: ApplicationFiled: November 17, 2006Publication date: May 22, 2008Applicant: Medtronic Vascular, Inc.Inventor: Joseph Lessar
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Patent number: 7318837Abstract: A balloon-expandable stent formed from a customized alloy formulation. The stent alloy has a either a high, variable or no work hardening rate, very high modulus of elasticity (Young's modulus), and a low yield point. A stent constructed of a material with this combination of properties undergoes significant plastic deformation upon deployment in vivo to its implantation diameter and exhibits minimum recoil for better sizing. The plastic deformation also raises the subsequent yield point of the stent material resulting in a stronger stent upon implantation that is more resistant to vascular loading.Type: GrantFiled: March 30, 2006Date of Patent: January 15, 2008Assignee: Medtronic Vascular, Inc.Inventors: Michael Krivoruchko, Joseph Lessar, Richard Francis, Matthew Birdsall, Darrel Untereker, Jeffrey Allen
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Publication number: 20070244544Abstract: A valve replacement system that can be used for treating abnormalities of the right ventricular outflow tract includes a prosthetic valve device having a sealant contacting at least a portion of the outer surface of the valve device. The sealant may be breakable, and may be a hydrogel, an expandable hydrogel, or a solid. One embodiment of the invention includes a flowable sealant that is injected within the vascular system. Another embodiment of the invention includes a method for replacing a pulmonary valve that includes forming a seal around the exterior surface of a replacement valve and preventing blood flow around the replacement valve.Type: ApplicationFiled: April 14, 2006Publication date: October 18, 2007Applicant: Medtronic Vascular, Inc.Inventors: Matthew Birdsall, Mark Dolan, Justin Goshgarian, Michael Krivoruchko, Joseph Lessar, Darrel Untereker, Peter Urbanski
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Publication number: 20070233073Abstract: A spinal rod characterized by a time-varying stiffness. The rod comprises a first member and at least one second member that is mechanically coupled to the first member through a time-varying interface. The interface features a binding mechanism that degrades after surgical installation. For instance, the interface may be bioabsorbable and dissolve upon exposure to bodily fluids. In another instance, the second member may be comprised of a bioabsorbable material. In another embodiment, the interface may fail under cyclic loading. In another embodiment, degradation of the bioabsorbable material may be inhibited through the application of a current source. The second member may be disposed within the first member. Alternatively, the first member and the second member may be disposed aside one another. The first member and the second member may be substantially similar in shape.Type: ApplicationFiled: March 2, 2006Publication date: October 4, 2007Inventors: Paul Wisnewski, Joseph Lessar, Dennis Buchanan
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Publication number: 20070233231Abstract: A balloon-expandable stent formed from a customized alloy formulation. The stent alloy has a either a high, variable or no work hardening rate, very high modulus of elasticity (Young's modulus), and a low yield point. A stent constructed of a material with this combination of properties undergoes significant plastic deformation upon deployment in vivo to its implantation diameter and exhibits minimum recoil for better sizing. The plastic deformation also raises the subsequent yield point of the stent material resulting in a stronger stent upon implantation that is more resistant to vascular loading.Type: ApplicationFiled: March 30, 2006Publication date: October 4, 2007Applicant: Medtronic Vascular, Inc.Inventors: Michael Krivoruchko, Joseph Lessar, Richard Francis, MATHEW BIRDSALL, JEFFREY ALLEN, DARREL UNTEREKER
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Patent number: 7270679Abstract: This invention relates to an implantable medical device to treat a patient. The implantable device can be an orthopedic device such as a spinal implant including, but not restricted to, a disc or nucleus pulposus prosthesis, a spinal rod assembly, or a bone fixation plate. The orthopedic device can be formed to include a metal matrix composite that provides enhanced wear and diagnostic imaging techniques. In other forms, the present invention provides an implantable medical device that includes a porous metal matrix composite that can deliver a therapeutic composition to a patient. In still other forms, the present invention provides an implantable electrical device or lead formed to include a metal matrix composite that provides lower polarization and interfacial impedance and allows enhanced sensing of the physiological signals.Type: GrantFiled: February 18, 2004Date of Patent: September 18, 2007Assignee: Warsaw Orthopedic, Inc.Inventors: Naim Istephanous, Joseph Lessar, Greg Marik, Darrel Untereker
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Publication number: 20070201186Abstract: A capacitor cell is presented. The capacitor cell includes an anode, a cathode spaced from and operatively associated with the anode, an electrolyte operatively associated with the anode and the cathode. A layered separator includes a plurality of separator material layers disposed between the anode and cathode. The plurality of separator material layers includes a first layer and a second layer. The first layer is characterized by a first value of a physical property and the second layer is characterized by a second value of the physical property.Type: ApplicationFiled: February 28, 2006Publication date: August 30, 2007Inventors: John Norton, Thomas Miltich, Anthony Rorvick, Christian Nielsen, Mark Breyen, Joseph Lessar, Paul Pignato
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Publication number: 20070179555Abstract: An electrical interconnect structure for an implantable medical device includes a feedthrough that has a pin extending therefrom. The pin defines a first end and a middle portion. A bonding surface is formed at the first end of the pin, and the bonding surface has a surface area greater than a cross-sectional area of the pin at its middle portion.Type: ApplicationFiled: January 30, 2006Publication date: August 2, 2007Inventors: Rajesh Iyer, William Taylor, Joseph Lessar, Mark Breyen, Daniel Koch
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Publication number: 20070055360Abstract: A stent graft extends in a flow lumen to span a defective portion of the flow lumen and seal the defective portion from further blood contact. The stent graft includes a pair of apertures, from which extensions project into the renal arteries to seal the passage of blood into the renal arteries from the abnormality. The apertures are larger than the opening of the renal arteries, such that the apertures need not be centered with the renal arteries to enable placement of the extensions. The aperture opening and side branch extensions contain hook and loop structures to provide a variably positionable seal of the aperture opening.Type: ApplicationFiled: September 2, 2005Publication date: March 8, 2007Applicant: Medtronic Vascular, Inc.Inventors: Curtis Hanson, Scott Cook, Joseph Lessar
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Publication number: 20060210880Abstract: A current collector for a battery in an implantable medical device is presented. The current collector comprises a material that includes a first surface and a second surface. A first set of apertures extend from the first surface to the second surface of the material. A second set of apertures extend from the first surface to the second surface of the material. The second set of apertures are off-set from the first set of apertures.Type: ApplicationFiled: January 31, 2006Publication date: September 21, 2006Inventors: William Howard, Joseph Lessar
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Publication number: 20040243241Abstract: This invention relates to an implantable medical device to treat a patient. The implantable device can be an orthopedic device such as a spinal implant including, but not restricted to, a disc or nucleus pulposus prosthesis, a spinal rod assembly, or a bone fixation plate. The orthopedic device can be formed to include a metal matrix composite that provides enhanced wear and diagnostic imaging techniques. In other forms, the present invention provides an implantable medical device that includes a porous metal matrix composite that can deliver a therapeutic composition to a patient. In still other forms, the present invention provides an implantable electrical device or lead formed to include a metal matrix composite that provides lower polarization and interfacial impedance and allows enhanced sensing of the physiological signals.Type: ApplicationFiled: February 18, 2004Publication date: December 2, 2004Inventors: Naim Istephanous, Joseph Lessar, Greg Marik, Darrel Untereker
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Patent number: 5306581Abstract: A lithium battery having a weldable feedthrough which is compatible with liquid electrolytes containing organic solvents and lithium salts under long term use conditions. The feedthrough comprises a pin of niobium or tantalum and ductile alloys thereof and a low silica insulating glass positioned around a portion of the pin in sealing engagement with the pin. The feedthrough is assembled into an aperture of the battery case where it provides an electrically conductive pathway from the anode or cathode to the exterior of the case and provides a hermetic seal.Type: GrantFiled: April 8, 1992Date of Patent: April 26, 1994Assignee: Medtronic, Inc.Inventors: William J. Taylor, Douglas J. Weiss, Joseph Lessar, Jennifer P. Miller, Robert E. Kraska