Patents by Inventor Andrew E. Fisk
Andrew E. Fisk 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: 20210285085Abstract: A surface geometry for an implantable medical electrode that optimizes the electrical characteristics of the electrode and enables an efficient transfer of signals from the electrode to surrounding bodily tissue. The coating is optimized to increase the double layer capacitance and to lower the after-potential polarization for signals having a pulse width in a pre-determined range by keeping the amplitude of the surface geometry with a desired range.Type: ApplicationFiled: May 21, 2020Publication date: September 16, 2021Inventor: Andrew E. Fisk
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Patent number: 10791945Abstract: A biocompatible, implantable electrode for electrically active medical devices. The implantable medical electrode has a surface geometry which optimizes the electrical performance of the electrode, while mitigating the undesirable effects associated with prior art porous surfaces. The electrode has an optimized surface topography for improved electrical performance. Such a electrode is suitable for devices which may be permanently implanted in the human body as stimulation electrodes, such as pacemakers, or as sensors of medical conditions. Such is achieved by the application of ultrafast high energy pulses to the surface of a solid, monolithic electrode material for the purpose of increasing the surface area and thereby decreasing its after-potential polarization.Type: GrantFiled: May 30, 2013Date of Patent: October 6, 2020Assignee: PULSE IP, LLCInventor: Andrew E. Fisk
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Patent number: 10487385Abstract: A titanium based, ceramic reinforced body formed from an alloy having from about 3 wt. % to about 10 wt. % of zirconium, about 10 wt. % to about 25 wt. % of niobium, from about 0.5 wt. % to about 2 wt. % of silicon, and from about 63 wt. % to about 86.5 wt. % of titanium. The alloy has a hexagonal crystal lattice ? phase of from about 20 vol % to about 70 vol %, and a cubic body centered ? crystal lattice phase of from about 30 vol. % to about 80 vol. %. The body has an ultimate tensile strength of about 950 MPa or more, and a Young's modulus of about 150 GPa or less. A molten substantially uniform admixture of a zirconium, niobium, silicon, and titanium alloy is formed, cast into a shape, and cooled into body. The body may then be formed into a desired shape, for example, a medical implant and optionally annealed.Type: GrantFiled: July 17, 2017Date of Patent: November 26, 2019Assignee: Pulse IP, LLCInventors: Andrew E. Fisk, Anatolii Demchyshyn, Leonid Kulak, Mykola Kuzmenko
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Patent number: 10219715Abstract: A biocompatible, implantable electrode for electrically active medical devices. The implantable medical electrode has a surface geometry which optimizes the electrical performance of the electrode, while mitigating the undesirable effects associated with prior art porous surfaces. The electrode has an optimized surface topography for improved electrical performance. Such a electrode is suitable for devices which may be permanently implanted in the human body as stimulation electrodes, such as pacemakers, or as sensors of medical conditions. Such is achieved by the application of ultrafast high energy pulses to the surface of a solid, monolithic electrode material for the purpose of increasing the surface area and thereby decreasing its after-potential polarization. In addition, the electrode material comprises a biocompatible metal having a minimal or eliminated amount of metal oxides which are detrimental to electrode performance.Type: GrantFiled: June 17, 2015Date of Patent: March 5, 2019Assignee: Pulse Technologies, Inc.Inventor: Andrew E. Fisk
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Publication number: 20180016669Abstract: A titanium based, ceramic reinforced body formed from an alloy having from about 3 wt. % to about 10 wt. % of zirconium, about 10 wt. % to about 25 wt. % of niobium, from about 0.5 wt. % to about 2 wt. % of silicon, and from about 63 wt. % to about 86.5 wt. % of titanium. The alloy has a hexagonal crystal lattice a phase of from about 20 vol % to about 70 vol %, and a cubic body centered ? crystal lattice phase of from about 30 vol. % to about 80 vol. %. The body has an ultimate tensile strength of about 950 MPa or more, and a Young's modulus of about 150 GPa or less. A molten substantially uniform admixture of a zirconium, niobium, silicon, and titanium alloy is formed, cast into a shape, and cooled into body. The body may then be formed into a desired shape, for example, a medical implant and optionally annealed.Type: ApplicationFiled: July 17, 2017Publication date: January 18, 2018Inventors: Andrew E. Fisk, Anatolii Demchyshyn, Leonid Kulak, Mykola Kuzmenko
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Publication number: 20160367159Abstract: A biocompatible, implantable electrode for electrically active medical devices. The implantable medical electrode has a surface geometry which optimizes the electrical performance of the electrode, while mitigating the undesirable effects associated with prior art porous surfaces. The electrode has an optimized surface topography for improved electrical performance. Such a electrode is suitable for devices which may be permanently implanted in the human body as stimulation electrodes, such as pacemakers, or as sensors of medical conditions. Such is achieved by the application of ultrafast high energy pulses to the surface of a solid, monolithic electrode material for the purpose of increasing the surface area and thereby decreasing its after-potential polarization. In addition, the electrode material comprises a biocompatible metal having a minimal or eliminated amount of metal oxides which are detrimental to electrode performance.Type: ApplicationFiled: June 17, 2015Publication date: December 22, 2016Applicant: Pulse Technologies, Inc.Inventor: Andrew E. Fisk
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Patent number: 9117680Abstract: A biocompatible, implantable electrode for electrically active medical devices. The implantable medical electrode has a surface geometry which optimizes the electrical performance of the electrode, while mitigating the undesirable effects associated with prior art porous surfaces. The electrode has an optimized surface topography for improved electrical performance. Such a electrode is suitable for devices which may be permanently implanted in the human body as stimulation electrodes, such as pacemakers, or as sensors of medical conditions. Such is achieved by the application of ultrafast high energy pulses to the surface of a solid, monolithic electrode material for the purpose of increasing the surface area and thereby decreasing its after-potential polarization.Type: GrantFiled: December 20, 2013Date of Patent: August 25, 2015Assignee: Pulse Technologies Inc.Inventor: Andrew E. Fisk
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Publication number: 20150173635Abstract: A biocompatible, implantable electrode for electrically active medical devices. The implantable medical electrode has a surface geometry which optimizes the electrical performance of the electrode, while mitigating the undesirable effects associated with prior art porous surfaces. The electrode has an optimized surface topography for improved electrical performance. Such a electrode is suitable for devices which may be permanently implanted in the human body as stimulation electrodes, such as pacemakers, or as sensors of medical conditions. Such is achieved by the application of ultrafast high energy pulses to the surface of a solid, monolithic electrode material for the purpose of increasing the surface area and thereby decreasing its after-potential polarization.Type: ApplicationFiled: December 20, 2013Publication date: June 25, 2015Applicant: PULSE TECHNOLOGIES, INC.Inventor: ANDREW E. FISK
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Patent number: 9039963Abstract: A titanium based, ceramic reinforced alloy ingot for use in producing medical implants. An ingot is formed from an alloy having comprising from about 5 to about 35 wt. % niobium, from about 0.5 to about 3.5 wt. % silicon, and from about 61.5 to about 94.5 wt. % of titanium. The alloy has a hexagonal crystal lattice ? phase of from about 20 vol % to about 70 vol %, and a cubic body centered ? crystal lattice phase of from about 30 vol. % to about 80 vol. %. The ingot has an ultimate tensile strength of about 940 MPa or more, and a Young's modulus of about 150 GPa or less. A molten substantially uniform admixture of a niobium, silicon, and titanium alloy is formed, cast into a shape, and cooled into an ingot. The ingot may then be formed into a medical implant and optionally annealed.Type: GrantFiled: October 12, 2012Date of Patent: May 26, 2015Assignee: Pulse Technologies, Inc.Inventors: Andrew E. Fisk, Anatolii Demchyshyn, Mykola Kuzmenko, Sergei Firstov, Leonid Kulak
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Patent number: 8948881Abstract: An implantable electrode comprising a substrate supporting microscopic surface structures such as columnar titanium nitride and further having nanoscopic surface structures on titanium nitride deposited on the exposed surface of the microscopic columnar structures is described. This is done through physical vapor deposition (PVD) and is based upon a relatively abrupt change in the surface mobility of the depositing material with a consequential variation in nucleation site density and surface mobility. At low mobility, there are increased nucleation sites and the condensation features are more numerous and finer. As mobility of the deposited species increases, the nucleation sites in the condensate film become fewer with coarser features.Type: GrantFiled: May 18, 2007Date of Patent: February 3, 2015Assignee: Greatbatch Ltd.Inventor: Andrew E. Fisk
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Publication number: 20140357973Abstract: A biocompatible, implantable electrode for electrically active medical devices. The implantable medical electrode has a surface geometry which optimizes the electrical performance of the electrode, while mitigating the undesirable effects associated with prior art porous surfaces. The electrode has an optimized surface topography for improved electrical performance. Such a electrode is suitable for devices which may be permanently implanted in the human body as stimulation electrodes, such as pacemakers, or as sensors of medical conditions. Such is achieved by the application of ultrafast high energy pulses to the surface of a solid, monolithic electrode material for the purpose of increasing the surface area and thereby decreasing its after-potential polarization.Type: ApplicationFiled: May 30, 2013Publication date: December 4, 2014Applicant: PULSE TECHNOLOGIES, INC.Inventor: Andrew E. Fisk
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Publication number: 20140105781Abstract: A titanium based, ceramic reinforced alloy ingot for use in producing medical implants. An ingot is formed from an alloy having comprising from about 5 to about 35 wt. % niobium, from about 0.5 to about 3.5 wt. % A silicon, and from about 61.5 to about 94.5 wt. % of titanium. The alloy has a hexagonal crystal lattice a phase of from about 20 vol % to about 70 vol %, and a cubic body centered 13 crystal lattice phase of from about 30 vol. % to about 80 vol. %. The ingot has an ultimate tensile strength of about 940 MPa or more, and a Young's modulus of about 150 GPa or less. A molten substantially uniform admixture of a niobium, silicon, and titanium alloy is formed, cast into a shape, and cooled into an ingot. The ingot may then be formed into a medical implant and optionally annealed.Type: ApplicationFiled: October 12, 2012Publication date: April 17, 2014Applicant: Pulse Technologies, Inc.Inventors: ANDREW E. FISK, Anatolii Demchyshyn, Mykola Kuzmenko, Sergei Firstov, Leonid Kulak
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Publication number: 20140034484Abstract: A method and apparatus for depositing a metal onto a substrate using a cathodic arc plasma source as a source of metal ions. A plasma deposition apparatus has a vacuum chamber; and a conduit within the vacuum chamber having an input end and an output end. A substrate is within the vacuum chamber, positioned to receive a plasma at the output end of the conduit. A cathodic arc plasma source within the vacuum chamber is positioned to inject a composition comprising a mixture of a plasma and electrons into the input end of the conduit toward the output end of the conduit. A magnetic field generator establishes a magnetic field within the conduit a plurality of electrodes located within the magnetic field and an electric field generator establishes an electric field within the conduit. The apparatus reduces or eliminates liquid metal droplets emitted from such a plasma source.Type: ApplicationFiled: July 31, 2012Publication date: February 6, 2014Inventors: Andrew E. Fisk, Vasyliy I. Maslov, Alexey A. Goncharov
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Publication number: 20120093707Abstract: A surface geometry for an implantable medical electrode that optimizes the electrical characteristics of the electrode and enables an efficient transfer of signals from the electrode to surrounding bodily tissue. The coating is optimized to increase the double layer capacitance and to lower the after-potential polarization for signals having a pulse width in a pre-determined range by keeping the amplitude of the surface geometry with a desired range.Type: ApplicationFiled: April 15, 2011Publication date: April 19, 2012Applicant: PULSE TECHNOLOGIES, INC.Inventor: Andrew E. Fisk
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Publication number: 20120094024Abstract: A surface geometry for an implantable medical electrode that optimizes the electrical characteristics of the electrode and enables an efficient transfer of signals from the electrode to surrounding bodily tissue. The coating is optimized to increase the double layer capacitance and to lower the after-potential polarization for signals having a pulse width in a pre-determined range by keeping the amplitude of the surface geometry with a desired range.Type: ApplicationFiled: April 15, 2011Publication date: April 19, 2012Applicant: PULSE TECHNOLOGIES, INC.Inventor: Andrew E. Fisk
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Patent number: 7812691Abstract: A feedthrough filter capacitor assembly is described. The feedthrough filter capacitor assembly comprises an outer ferrule hermetically sealed to an insulator of a dielectric material seated within the ferrule. The insulative material is also hermetically sealed to at least one lead wire. Instead of being made of platinum or platinum/iridium, the lead wire comprises a core of a non-noble metal supporting a functionally graded coating. The metal core has an inner layer of the same the non-noble metal of the core and an outer layer of a noble metal. A gradient transition zone exists between the non-noble metal and the outer noble metal. Consequently, lead wires having all the beneficial attributes of platinum and platinum/iridium wire can be built into hermetic feedthroughs, but at a significantly reduced cost.Type: GrantFiled: November 10, 2008Date of Patent: October 12, 2010Assignee: Greatbatch Ltd.Inventors: Andrew E. Fisk, Richard X. Fu, Christine A. Frysz
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Publication number: 20080299289Abstract: A surface geometry for an implantable medical electrode that optimizes the electrical characteristics of the electrode and enables an efficient transfer of signals from the electrode to surrounding bodily tissue. The coating is optimized to increase the double layer capacitance and to lower the after-potential polarization for signals having a pulse width in a pre-determined range by keeping the amplitude of the surface geometry with a desired range.Type: ApplicationFiled: October 8, 2007Publication date: December 4, 2008Inventor: Andrew E. Fisk
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Publication number: 20080299309Abstract: A method of producing a coating for a medical device having high surface area and low porosity. The coating is formed by a PVD process in which a primary metallic component is deposited in the presence of a secondary reactive component in a high energy environment such that surface diffusion and intermixing can occur prior to the solidification of the condensate. The resulting coating consists of a zone 2 microstructure having a [1,1,1] crystal orientation, which provides a surface having well-defined pyramidal-shaped structures formed thereon.Type: ApplicationFiled: May 29, 2007Publication date: December 4, 2008Inventor: Andrew E. Fisk
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Publication number: 20070270927Abstract: An implantable electrode comprising a substrate supporting microscopic surface structures such as columnar titanium nitride and further having nanoscopic surface structures on titanium nitride deposited on the exposed surface of the microscopic columnar structures is described. This is done through physical vapor deposition (PVD) and is based upon a relatively abrupt change in the surface mobility of the depositing material with a consequential variation in nucleation site density and surface mobility. At low mobility, there are increased nucleation sites and the condensation features are more numerous and finer. As mobility of the deposited species increases, the nucleation sites in the condensate film become fewer with coarser features.Type: ApplicationFiled: May 18, 2007Publication date: November 22, 2007Applicant: Greatbatch Ltd.Inventor: Andrew E. Fisk