Patents by Inventor Graig Kveen
Graig Kveen 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: 20230389975Abstract: A cryoablation tool has a primary fluid circuit for cryogenically cooling or heating tissue surrounding the distal portion of the cryoablation tool. The primary fluid circuit has a primary-primary heat exchanger facilitating recuperative heat exchange between a high pressure stream of a primary fluid and a low pressure stream of the primary fluid. The cryoablation tool has a secondary fluid circuit having a secondary-secondary heat exchanger for permitting recuperative heat exchange between a high pressure stream of a secondary fluid and a low pressure stream of the secondary fluid. The secondary fluid circuit also has a primary-secondary heat exchanger permitting heat exchange between the high pressure stream of the primary fluid and the low pressure stream of the secondary fluid.Type: ApplicationFiled: August 21, 2023Publication date: December 7, 2023Inventors: Satish Ramadhyani, Graig Kveen, Harishankar Natesan
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Patent number: 11786285Abstract: A cryoablation tool has a primary fluid circuit for cryogenically cooling or heating tissue surrounding the distal portion of the cryoablation tool. The primary fluid circuit has a primary-primary heat exchanger facilitating recuperative heat exchange between a high pressure stream of a primary fluid and a low pressure stream of the primary fluid. The cryoablation tool has a secondary fluid circuit having a secondary-secondary heat exchanger for permitting recuperative heat exchange between a high pressure stream of a secondary fluid and a low pressure stream of the secondary fluid. The secondary fluid circuit also has a primary-secondary heat exchanger permitting heat exchange between the high pressure stream of the primary fluid and the low pressure stream of the secondary fluid.Type: GrantFiled: August 14, 2020Date of Patent: October 17, 2023Assignee: BIOCOMPATIBLES UK LIMITEDInventors: Satish Ramadhyani, Graig Kveen, Harishankar Natesan
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Publication number: 20210045793Abstract: A cryoablation tool has a primary fluid circuit for cryogenically cooling or heating tissue surrounding the distal portion of the cryoablation tool. The primary fluid circuit has a primary-primary heat exchanger facilitating recuperative heat exchange between a high pressure stream of a primary fluid and a low pressure stream of the primary fluid. The cryoablation tool has a secondary fluid circuit having a secondary-secondary heat exchanger for permitting recuperative heat exchange between a high pressure stream of a secondary fluid and a low pressure stream of the secondary fluid. The secondary fluid circuit also has a primary-secondary heat exchanger permitting heat exchange between the high pressure stream of the primary fluid and the low pressure stream of the secondary fluid.Type: ApplicationFiled: August 14, 2020Publication date: February 18, 2021Inventors: Satish Ramadhyani, Graig Kveen, Harishankar Nateshan
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Publication number: 20210045794Abstract: A cryoablation tool may include a catheter. The catheter may have a shaft having: a proximal end, a distal end, a shaft wall extending between the proximal end and the distal end, the shaft wall having an outer surface and an inner surface and a vacuum gap defined therebetween that forms a vacuum chamber, the inner surface of the shaft wall being gas permeable, a shaft lumen bounded by the inner surface of the shaft wall, the shaft lumen for carrying a cryogen gas, and the vacuum chamber having a proximal opening connectable to a vacuum source, the proximal opening establishing vacuum communication between the vacuum chamber and the vacuum source.Type: ApplicationFiled: August 14, 2020Publication date: February 18, 2021Inventors: Satish Ramadhyani, Graig Kveen, Harishankar Natesan
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Patent number: 8340780Abstract: Various configurations of systems that employ leadless electrodes to provide pacing therapy are provided. In one example, a system that provides multiple sites for pacing of myocardium of a heart includes wireless pacing electrode assemblies that are implantable at sites proximate the myocardium using a percutaneous, transluminal, catheter delivery system. Also disclosed are various configurations of such systems, wireless electrode assemblies, and delivery catheters for delivering and implanting the electrode assemblies.Type: GrantFiled: May 7, 2007Date of Patent: December 25, 2012Assignee: Scimed Life Systems, Inc.Inventors: Roger N. Hastings, Anupama Sadasiva, Michael J. Pikus, Graig Kveen
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Patent number: 7647109Abstract: Various configurations of systems that employ leadless electrodes to provide pacing therapy are provided. In one example, a system that provides multiple sites for pacing of myocardium of a heart includes wireless pacing electrode assemblies that are implantable at sites proximate the myocardium using a percutaneous, transluminal, catheter delivery system. Also disclosed are various configurations of such systems, wireless electrode assemblies, and delivery catheters for delivering and implanting the electrode assemblies.Type: GrantFiled: March 7, 2005Date of Patent: January 12, 2010Assignee: Boston Scientific Scimed, Inc.Inventors: Roger N. Hastings, Anupama Sadasiva, Michael J. Pikus, Graig Kveen
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Publication number: 20090082827Abstract: A hinged anchor for a medical device electrode is disclosed. In one embodiment, the hinged anchor has a hinged portion and an anchor portion. The hinged portion can have a first configuration forming a first angle and a second configuration forming a second angle. The second angle can be a sharper angle than the first angle, and the hinged portion can be predisposed to assume the second configuration. The hinged anchor can be disposed on a control module of a leadless microstimulator device.Type: ApplicationFiled: September 26, 2007Publication date: March 26, 2009Applicant: CARDIAC PACEMAKERS, INC.Inventors: Graig Kveen, Douglas Saholt, Joseph Thielen, Mark Jenson, William Drasler
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Publication number: 20080109054Abstract: Various configurations of systems that employ leadless electrodes to provide pacing therapy are provided. In one example, a system that provides multiple sites for pacing of myocardium of a heart includes wireless pacing electrode assemblies that are implantable at sites proximate the myocardium using a percutaneous, transluminal, catheter delivery system. Also disclosed are various configurations of such systems, wireless electrode assemblies, and delivery catheters for delivering and implanting the electrode assemblies.Type: ApplicationFiled: May 7, 2007Publication date: May 8, 2008Applicant: SCIMED LIFE SYSTEMS, INC.Inventors: Roger N. Hastings, Anupama Sadasiva, Michael J. Pikus, Graig Kveen
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Publication number: 20070150009Abstract: Apparatus, system, and method that include a pacing apparatus having a stent electrode through which pulses of electrical current can be delivered. Stent electrodes receive energy for generating the electrical current from a variety of sources. Sources include from one or more induction coils that can form at least a portion of the stent. Sources can also include an implantable pulse generator coupled to a lead through which pulses of the electrical current are supplied to the stent electrodes.Type: ApplicationFiled: December 22, 2005Publication date: June 28, 2007Inventors: Graig Kveen, Roger Hastings, Anupama Sadasiva, Vitaly Shapovalov, Daniel Lafontaine
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Publication number: 20070135883Abstract: Some embodiments of pacing systems employ wireless electrode assemblies to provide pacing therapy. The wireless electrode assemblies may wirelessly receive energy via an inductive coupling so as to provide electrical stimulation to the surrounding heart tissue. In certain embodiments, the wireless electrode assembly may include one or more biased tines that shift from a first position to a second position to secure the wireless electrode assembly into the inner wall of the heart chamber.Type: ApplicationFiled: October 13, 2006Publication date: June 14, 2007Applicant: Boston Scientific Scimed, Inc.Inventors: William Drasler, Michael Pikus, Roger Hastings, Scott Smith, Martin Willard, Daniel Lafontaine, Douglas Saholt, Graig Kveen
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Publication number: 20070067023Abstract: A tether guided bifurcated stent having a generally tubular main body extending along a longitudinal axis connected to a side branch assembly. Both the main stent body and the side branch assembly are capable of forming an unexpanded configuration and an expanded configuration. The bifurcation's expansion is facilitated by a force exerted by the tether. When the side branch assembly is expanded it forms a secondary tubular region defining a generally tubular shape extending at an angle to the longitudinal axis of the main tubular body.Type: ApplicationFiled: September 20, 2006Publication date: March 22, 2007Applicant: Boston Scientific Scimed, Inc.Inventors: Graig Kveen, Mark Jenson
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Publication number: 20060149356Abstract: A radially expandable stent comprising a plurality of spaced band-like elements and intersecting links is disclosed. The band-like elements have a generally serpentine configuration to provide continuous waves of generally sinusoidal character to each band-like element. The waves are characterized by a plurality of peaks and troughs taking a generally longitudinal direction along the cylinder such that the waves in the band-like elements open as the stent is expanded from a first diameter to a second diameter. The intersecting links are substantially U-shaped and terminate in first and second shanks. The first shank of a link emanates from a region between a peak and trough on a band-like element and the second shank of the link emanates from a region between a peak and trough on an adjacent band-like element.Type: ApplicationFiled: March 3, 2006Publication date: July 6, 2006Applicant: Boston Scientific Scimed, Inc.Inventors: Graig Kveen, Timothy Ehr, Brian Brown
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Publication number: 20060136042Abstract: A tubular, expandable prosthesis comprises a framework with a plurality of openings therethrough and a carbon nanotube sheet. The carbon nanotube sheet extends across at least one of the openings.Type: ApplicationFiled: December 22, 2004Publication date: June 22, 2006Applicant: SCIMED LIFE SYSTEMS, INC.Inventors: Thomas Holman, Jan Weber, Graig Kveen
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Publication number: 20060085042Abstract: Various configurations of systems that employ leadless electrodes to provide pacing therapy are provided. In one example, a system that provides multiple sites for pacing of myocardium of a heart includes wireless pacing electrode assemblies that are implantable at sites proximate the myocardium using a percutaneous, transluminal, catheter delivery system. Also disclosed are various configurations of such systems, wireless electrode assemblies, and delivery catheters for delivering and implanting the electrode assemblies.Type: ApplicationFiled: March 7, 2005Publication date: April 20, 2006Inventors: Roger Hastings, Anupama Sadasiva, Michael Pikus, Graig Kveen
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Publication number: 20050251248Abstract: A medical device such as a coronary stent is provided that can be visualized in-vivo while further aiding in the prevention of restenosis. The medical device comprises a core having a first layer disposed thereon. The first layer is made from a material that is radio-opaque so that the medical device may be visualized in-vivo. An outer layer is disposed onto and surrounds at least a portion of the first layer to provide a barrier layer between the radio-opaque inner layer and blood and/or tissue disposed within the patient's vessel. The outer surface of the outer layer may include a textured surface of micro-pores, grooves, cross-hatched lines to receive a therapeutic agent. Drugs and treatments which utilize anti-thombogenic agents, and anti-proliferation agents may be readily deployed from the textured outer surface of the outer layer of the medical device.Type: ApplicationFiled: July 18, 2005Publication date: November 10, 2005Inventors: Verivada Chandresekara, Graig Kveen
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Publication number: 20050216076Abstract: An expandable tubular reinforcing member used for body lumens such as blood vessels, the reinforcing member being formed of a continuous elongated helical element comprised of spaced undulating portions forming end loop portions and including a plurality of curvilinear connector elements extending between and interconnecting at least some of the adjacent undulating portions of the helical element over its length.Type: ApplicationFiled: May 25, 2005Publication date: September 29, 2005Applicant: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Graig Kveen, Burns Doran, Robert Judnitch
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Publication number: 20050182480Abstract: In one embodiment of the invention, a stent may be provided comprising a first undulating band comprising a series of alternating first peaks and first troughs and a second undulating band comprising a series of alternating second peaks and second troughs. The first undulating band has a first wavelength and a first amplitude and the second undulating band has a second wavelength and a second amplitude where the second amplitude is different from the first amplitude and the second wavelength is different from the first wavelength. A plurality of longitudinally oriented first connectors extend between the first peaks and second peaks.Type: ApplicationFiled: November 23, 2004Publication date: August 18, 2005Applicant: SCIMED LIFE SYSTEMS, INC.Inventors: Burns Doran, Jason Lenz, Graig Kveen, Timothy Girton, James Hemerick, Timothy Ley
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Publication number: 20050021130Abstract: A radially expandable stent comprising a plurality of spaced band-like elements and intersecting links is disclosed. The band-like elements have a generally serpentine configuration to provide continuous waves of generally sinusoidal character to each band-like element. The waves are characterized by a plurality of peaks and troughs taking a generally longitudinal direction along the cylinder such that the waves in the band-like elements open as the stent is expanded from a first diameter to a second diameter. The intersecting links are substantially U-shaped and terminate in first and second shanks. The first shank of a link emanates from a region between a peak and trough on a band-like element and the second shank of the link emanates from a region between a peak and trough on an adjacent band-like element.Type: ApplicationFiled: August 17, 2004Publication date: January 27, 2005Applicant: SCIMED LIFE SYSTEMS, INC.Inventors: Graig Kveen, Timothy Ehr, Brian Brown
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Publication number: 20020138136Abstract: A medical device such as a coronary stent is provided that can be visualized in-vivo while further aiding in the prevention of restenosis. The medical device comprises a core having a first layer disposed thereon. The first layer is made from a material that is radio-opaque so that the medical device may be visualized in-vivo. An outer layer is disposed onto and surrounds at least a portion of the first layer to provide a barrier layer between the radio-opaque inner layer and blood and/or tissue disposed within the patient's vessel. The outer surface of the outer layer may include a textured surface of micro-pores, grooves, cross-hatched lines to receive a therapeutic agent. Drugs and treatments which utilize anti-thombogenic agents, and anti-proliferation agents may be readily deployed from the textured outer surface of the outer layer of the medical device.Type: ApplicationFiled: March 23, 2001Publication date: September 26, 2002Applicant: SCIMED Life Systems, Inc.Inventors: Verivada Chandru Chandresekaran, Graig Kveen