Patents by Inventor David R. Bowen
David R. Bowen 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: 12340951Abstract: A capacitor and methods of processing an anode metal foil are presented. The capacitor includes a housing, one or more anodes disposed within the housing, one or more cathodes disposed within the housing, one or more separators disposed between an adjacent anode and cathode, and an electrolyte disposed around the one or more anodes, one or more cathodes, and one or more separators within the housing. The one or more anodes each include a metal foil that includes a first plurality of tunnels through a thickness of the metal foil in a first ordered arrangement having a first diameter, and a second plurality of tunnels through the thickness of the metal foil having a second ordered arrangement and a second diameter greater than the first diameter.Type: GrantFiled: June 4, 2024Date of Patent: June 24, 2025Assignee: PACESETTER, INC.Inventors: Ralph Jason Hemphill, David R. Bowen, Kurt J. Erickson, Peter Fernstrom
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Publication number: 20250069816Abstract: Fabricating a capacitor includes forming conduits in a porous layer of material. The porous layer of material has particles that each include a dielectric on a core. The formation of the conduits causes a portion of the dielectric to convert from a first phase to a second phase. The method also includes removing at least a portion of the second phase of the dielectric from the porous layer of material.Type: ApplicationFiled: November 12, 2024Publication date: February 27, 2025Inventors: Ralph Jason Hemphill, David R. Bowen, Thomas F. Strange, Xiaofei Jiang
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Patent number: 12191089Abstract: Fabricating a capacitor includes forming conduits in a porous layer of material. The porous layer of material has particles that each includes a dielectric on a core. The formation of the conduits causes a portion of the dielectric to convert from a first phase to a second phase. The method also includes removing at least a portion of the second phase of the dielectric from the porous layer of material.Type: GrantFiled: December 22, 2023Date of Patent: January 7, 2025Assignee: Pacesetter, Inc.Inventors: Ralph Jason Hemphill, David R. Bowen, Thomas F. Strange, Xiaofei Jiang
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Publication number: 20240321523Abstract: A capacitor and methods of processing an anode metal foil are presented. The capacitor includes a housing, one or more anodes disposed within the housing, one or more cathodes disposed within the housing, one or more separators disposed between an adjacent anode and cathode, and an electrolyte disposed around the one or more anodes, one or more cathodes, and one or more separators within the housing. The one or more anodes each include a metal foil that includes a first plurality of tunnels through a thickness of the metal foil in a first ordered arrangement having a first diameter, and a second plurality of tunnels through the thickness of the metal foil having a second ordered arrangement and a second diameter greater than the first diameter.Type: ApplicationFiled: June 4, 2024Publication date: September 26, 2024Inventors: Ralph Jason Hemphill, David R. Bowen, Kurt J. Erickson, Peter Fernstrom
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Publication number: 20240252833Abstract: An implantable medical device (IMD) is provided that includes one or more processors and a memory coupled to the one or more processors, wherein the memory stores program instructions. The program instructions are executable by the one or more processors to obtain an initial capacitor maintenance time interval for performing maintenance on a capacitor of the IMD, obtain characteristics of interest related to at least one of the capacitor or the patient, and adjust the initial capacitor maintenance time interval to a first adjusted capacitor maintenance time interval based on the characteristics of interest.Type: ApplicationFiled: December 7, 2023Publication date: August 1, 2024Inventors: Xing Pei, R. Jason Hemphill, David R. Bowen, W. Joseph Beauvais
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Patent number: 12033807Abstract: A capacitor and methods of processing an anode metal foil are presented. The capacitor includes a housing, one or more anodes disposed within the housing, one or more cathodes disposed within the housing, one or more separators disposed between an adjacent anode and cathode, and an electrolyte disposed around the one or more anodes, one or more cathodes, and one or more separators within the housing. The one or more anodes each include a metal foil that includes a first plurality of tunnels through a thickness of the metal foil in a first ordered arrangement, the first ordered arrangement being a close packed hexagonal array arrangement, and having a first diameter, and a second plurality of tunnels through the thickness of the metal foil having a second ordered arrangement and a second diameter greater than the first diameter.Type: GrantFiled: October 26, 2021Date of Patent: July 9, 2024Assignee: Pacesetter, Inc.Inventors: Ralph Jason Hemphill, David R. Bowen, Kurt J. Erickson, Peter Fernstrom
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Publication number: 20240128024Abstract: Fabricating a capacitor includes forming conduits in a porous layer of material. The porous layer of material has particles that each includes a dielectric on a core. The formation of the conduits causes a portion of the dielectric to convert from a first phase to a second phase. The method also includes removing at least a portion of the second phase of the dielectric from the porous layer of material.Type: ApplicationFiled: December 22, 2023Publication date: April 18, 2024Inventors: Ralph Jason Hemphill, David R. Bowen, Thomas F. Strange, Xiaofei Jiang
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Patent number: 11901134Abstract: Fabricating a capacitor includes forming conduits in a porous layer of material. The porous layer of material has particles that each includes a dielectric on a core. The formation of the conduits causes a portion of the dielectric to convert from a first phase to a second phase. The method also includes removing at least a portion of the second phase of the dielectric from the porous layer of material.Type: GrantFiled: November 24, 2020Date of Patent: February 13, 2024Assignee: Pacesetter, Inc.Inventors: Ralph Jason Hemphill, David R. Bowen, Thomas F. Strange, Xiaofei Jiang
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Patent number: 11712751Abstract: Fabricating a capacitor includes performing an oxide formation operation on a sheet of material. The oxide formation operation forms an anode metal oxide on an anode metal. A thermal compression is performed on the sheet of material after the oxide formation operation is performed. The thermal compression applies thermal energy to the sheet of material while applying pressure to the sheet of material. After the thermal compression, the capacitor is assembled such that at least one electrode in the capacitor includes at least a portion of the sheet of material.Type: GrantFiled: June 9, 2017Date of Patent: August 1, 2023Assignee: Pacesetter. Inc.Inventors: Kurt J. Erickson, Jeffrey Jon Allison, John Moore, Thomas F. Strange, David R. Bowen
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Patent number: 11636985Abstract: A cathode subassembly for use in an electrolytic capacitor may include a first separator sheet including a surface having first and second regions, where the second region extends from a perimeter of the first region to a first peripheral edge of the first sheet, a second peripheral edge of a second sheet is substantially aligned with the first peripheral edge, a conductive foil is sandwiched between the first and second sheets and disposed within the first region, the first and second sheets are adhered to each other in a sealing region extending from the second region to a region of a surface of the second sheet facing the second region, and the first sheet includes at least one first recess portion at the first peripheral edge aligned with at least one second recess portion at the second peripheral edge of the second sheet.Type: GrantFiled: April 21, 2021Date of Patent: April 25, 2023Assignee: Pacesetter, Inc.Inventors: David R. Bowen, Ralph Jason Hemphill, Thomas F. Strange, Troy L. McCurry, Peter Fernstrom
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Patent number: 11469052Abstract: A capacitor and a method of processing an anode metal foil are presented. The method includes electrochemically etching the metal foil to form a plurality of tunnels. Next, the etched metal foil is disposed within a widening solution to widen the plurality of tunnels. Exposed surfaces of the etched metal foil are then oxidized. The method includes removing a section of the etched metal foil, where the section of the etched metal foil includes exposed metal along an edge. The section of the etched metal foil is placed into a bath comprising water to form a hydration layer over the exposed metal on the section of the etched metal foil. The method also includes assembling the section of the etched metal foil having the hydration layer as an anode within a capacitor.Type: GrantFiled: January 11, 2021Date of Patent: October 11, 2022Assignee: Pacesetter, Inc.Inventors: David R. Bowen, Ralph Jason Hemphill
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Publication number: 20220048140Abstract: A capacitor and methods of processing an anode metal foil are presented. The capacitor includes a housing, one or more anodes disposed within the housing, one or more cathodes disposed within the housing, one or more separators disposed between an adjacent anode and cathode, and an electrolyte disposed around the one or more anodes, one or more cathodes, and one or more separators within the housing. The one or more anodes each include a metal foil that includes a first plurality of tunnels through a thickness of the metal foil in a first ordered arrangement, the first ordered arrangement being a close packed hexagonal array arrangement, and having a first diameter, and a second plurality of tunnels through the thickness of the metal foil having a second ordered arrangement and a second diameter greater than the first diameter.Type: ApplicationFiled: October 26, 2021Publication date: February 17, 2022Applicant: Pacesetter,Inc.Inventors: Ralph Jason Hemphill, David R. Bowen, Kurt J. Erickson, Peter Fernstrom
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Patent number: 11185948Abstract: A capacitor and methods of processing an anode metal foil are presented. The capacitor includes a housing, one or more anodes disposed within the housing, one or more cathodes disposed within the housing, one or more separators disposed between an adjacent anode and cathode, and an electrolyte disposed around the one or more anodes, one or more cathodes, and one or more separators within the housing. The one or more anodes each include a metal foil that includes a first plurality of tunnels through a thickness of the metal foil in a first ordered arrangement, the first ordered arrangement being a close packed hexagonal array arrangement, and having a first diameter, and a second plurality of tunnels through the thickness of the metal foil having a second ordered arrangement and a second diameter greater than the first diameter.Type: GrantFiled: April 13, 2018Date of Patent: November 30, 2021Assignee: Pacesetter, Inc.Inventors: Ralph Jason Hemphill, David R. Bowen, Kurt J. Erickson, Peter Fernstrom
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Publication number: 20210241978Abstract: A cathode subassembly for use in an electrolytic capacitor may include a first separator sheet including a surface having first and second regions, where the second region extends from a perimeter of the first region to a first peripheral edge of the first sheet, a second peripheral edge of a second sheet is substantially aligned with the first peripheral edge, a conductive foil is sandwiched between the first and second sheets and disposed within the first region, the first and second sheets are adhered to each other in a sealing region extending from the second region to a region of a surface of the second sheet facing the second region, and the first sheet includes at least one first recess portion at the first peripheral edge aligned with at least one second recess portion at the second peripheral edge of the second sheet.Type: ApplicationFiled: April 21, 2021Publication date: August 5, 2021Inventors: David R. Bowen, Ralph Jason Hemphill, Thomas F. Strange, Troy L. McCurry, Peter Fernstrom
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Patent number: 11017955Abstract: A cathode subassembly for use in an electrolytic capacitor may include a first separator sheet including a surface having first and second regions, where the second region extends from a perimeter of the first region to a first peripheral edge of the first sheet, a second peripheral edge of a second sheet is substantially aligned with the first peripheral edge, a conductive foil is sandwiched between the first and second sheets and disposed within the first region, the first and second sheets are adhered to each other in a sealing region extending from the second region to a region of a surface of the second sheet facing the second region, and the first sheet includes at least one first recessed portion at the first peripheral edge aligned with at least one second recessed portion at the second peripheral edge of the second sheet.Type: GrantFiled: January 17, 2018Date of Patent: May 25, 2021Assignee: Pacesetter, Inc.Inventors: David R. Bowen, Ralph Jason Hemphill, Thomas F. Strange, Troy L. McCurry, Peter Fernstrom
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Publication number: 20210134533Abstract: A capacitor and a method of processing an anode metal foil are presented. The method includes electrochemically etching the metal foil to form a plurality of tunnels. Next, the etched metal foil is disposed within a widening solution to widen the plurality of tunnels. Exposed surfaces of the etched metal foil are then oxidized. The method includes removing a section of the etched metal foil, where the section of the etched metal foil includes exposed metal along an edge. The section of the etched metal foil is placed into a bath comprising water to form a hydration layer over the exposed metal on the section of the etched metal foil. The method also includes assembling the section of the etched metal foil having the hydration layer as an anode within a capacitor.Type: ApplicationFiled: January 11, 2021Publication date: May 6, 2021Applicant: Pacesetter, Inc.Inventors: David R. Bowen, Ralph Jason Hemphill
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Publication number: 20210082628Abstract: Fabricating a capacitor includes forming conduits in a porous layer of material. The porous layer of material has particles that each includes a dielectric on a core. The formation of the conduits causes a portion of the dielectric to convert from a first phase to a second phase. The method also includes removing at least a portion of the second phase of the dielectric from the porous layer of material.Type: ApplicationFiled: November 24, 2020Publication date: March 18, 2021Inventors: Ralph Jason Hemphill, David R. Bowen, Thomas F. Strange, Xiaofei Jiang
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Patent number: 10923291Abstract: A capacitor and a method of processing an anode metal foil are presented. The method includes electrochemically etching the metal foil to form a plurality of tunnels. Next, the etched metal foil is disposed within a widening solution to widen the plurality of tunnels. Exposed surfaces of the etched metal foil are then oxidized. The method includes removing a section of the etched metal foil, where the section of the etched metal foil includes exposed metal along an edge. The section of the etched metal foil is placed into a bath comprising water to form a hydration layer over the exposed metal on the section of the etched metal foil. The method also includes assembling the section of the etched metal foil having the hydration layer as an anode within a capacitor.Type: GrantFiled: April 20, 2018Date of Patent: February 16, 2021Assignee: Pacesetter, Inc.Inventors: David R. Bowen, Ralph Jason Hemphill
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Patent number: 10894157Abstract: A method of producing an electrode for use in the manufacture of electrolytic capacitors for implantable cardioverter defibrillators comprises first growing a hydrate layer and/or formed oxide layers of the foil, applying a laser beam to portions of the foil to ablate the aluminum oxide foil surface before etching in order to induce etching in the specific areas, and then, etching the foil. The laser marks the oxide layer in a pulsed spot pattern through the hydrate layer and/or formed oxide layer leaving a dimpled nascent aluminum surface. The oxide layer left behind is a mask and the fresh aluminum areas are the high etching activation sites. After marking the aluminum oxide foil surface, the foil may be electrochemically etched in an electrolyte containing chloride and/or various oxidative species.Type: GrantFiled: March 22, 2018Date of Patent: January 19, 2021Assignee: Pacesetter, Inc.Inventors: David R. Bowen, Ralph Jason Hemphill, Kurt J. Erickson
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Patent number: 10825613Abstract: The present invention is directed to a method of etching anode foil in a non-uniform manner which minimizes thermal oxidation during foil cutting. Having less oxide improves the ability to cut through aluminum anodes with lower energy rates. In aluminum foils, it has been found that a masking step before etching reduces conversion of boehmite aluminum oxide to alpha-phase corundum during laser cutting of anodes, which increases edge quality and productivity. Additionally, the non-etched anode frame allows for less surface area to form during the aging process. As a result, the leakage current is reduced by the proportion of edge to anode surface area, and the aging process will be faster, leading to higher productivity.Type: GrantFiled: August 24, 2018Date of Patent: November 3, 2020Assignee: Pacesetter, Inc.Inventors: Thomas F. Strange, Ralph Jason Hemphill, David R. Bowen, Kurt J. Erickson