Patents by Inventor Todd J. Hewitt
Todd J. Hewitt 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: 20240065701Abstract: A device for treatment of a vascular defect within a patient's vasculature includes a self-expanding permeable shell having a proximal end, a distal end, and a longitudinal axis, the shell comprising a plurality of elongate resilient filaments having a braided structure, wherein the filaments are secured at at least one of the proximal end or the distal end of the permeable shell, wherein the permeable shell has a radially constrained elongated state configured for delivery within a microcatheter and has an expanded state with an axially shortened configuration relative to the radially constrained state, the permeable shell having a plurality of openings formed between the braided filaments, wherein the permeable shell in its expanded state comprises a plurality of circumferentially-arrayed lobes.Type: ApplicationFiled: November 6, 2023Publication date: February 29, 2024Applicant: MicroVention, Inc.Inventors: Brian E. Merritt, Todd J. Hewitt
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Patent number: 11806020Abstract: A device for treatment of a vascular defect within a patient's vasculature includes a self-expanding permeable shell having a proximal end, a distal end, and a longitudinal axis, the shell comprising a plurality of elongate resilient filaments having a braided structure, wherein the filaments are secured at at least one of the proximal end or the distal end of the permeable shell, wherein the permeable shell has a radially constrained elongated state configured for delivery within a microcatheter and has an expanded state with an axially shortened configuration relative to the radially constrained state, the permeable shell having a plurality of openings formed between the braided filaments, wherein the permeable shell in its expanded state comprises a plurality of circumferentially-arrayed lobes.Type: GrantFiled: December 2, 2020Date of Patent: November 7, 2023Assignee: Sequent Medical, Inc.Inventors: Brian E. Merritt, Todd J. Hewitt
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Publication number: 20230338035Abstract: Devices and methods for treatment of a patient's vasculature may include a resilient self-expanding permeable implant having a plurality of elongate filaments secured in a hub at a proximal end of the permeable implant. Each of the plurality of elongate filaments may have a diameter between about 0.0005 and about 0.005 inches. The implant includes at least some filaments consisting of nitinol and at least some composite filaments that are drawn filled tube wires comprising an external nitinol tube and a radiopaque material concentrically disposed within the external tube. The implant has at least about 40% composite filaments relative to a total number of filaments, and wherein a total number of filaments is about 10 to about 300.Type: ApplicationFiled: June 27, 2023Publication date: October 26, 2023Inventors: Todd J. Hewitt, Brian E. Merritt, William R. Patterson
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Publication number: 20210169499Abstract: A device for treatment of a vascular defect within a patient's vasculature includes a self-expanding permeable shell having a proximal end, a distal end, and a longitudinal axis, the shell comprising a plurality of elongate resilient filaments having a braided structure, wherein the filaments are secured at at least one of the proximal end or the distal end of the permeable shell, wherein the permeable shell has a radially constrained elongated state configured for delivery within a microcatheter and has an expanded state with an axially shortened configuration relative to the radially constrained state, the permeable shell having a plurality of openings formed between the braided filaments, wherein the permeable shell in its expanded state comprises a plurality of circumferentially-arrayed lobes.Type: ApplicationFiled: December 2, 2020Publication date: June 10, 2021Applicant: Sequent Medical, Inc.Inventors: Brian E. Merritt, Todd J. Hewitt
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Patent number: 10881413Abstract: A device for treatment of a vascular defect within a patient's vasculature includes a self-expanding permeable shell having a proximal end, a distal end, and a longitudinal axis, the shell comprising a plurality of elongate resilient filaments having a braided structure, wherein the filaments are secured at at least one of the proximal end or the distal end of the permeable shell, wherein the permeable shell has a radially constrained elongated state configured for delivery within a microcatheter and has an expanded state with an axially shortened configuration relative to the radially constrained state, the permeable shell having a plurality of openings formed between the braided filaments, wherein the permeable shell in its expanded state comprises a plurality of circumferentially-arrayed lobes.Type: GrantFiled: March 16, 2018Date of Patent: January 5, 2021Assignee: Sequent Medical, Inc.Inventors: Brian E. Merritt, Todd J. Hewitt
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Patent number: 10813645Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include a resilient self-expanding permeable implant having a radially constrained elongated state configured for delivery within a catheter lumen and an expanded state with a longitudinally shortened configuration, and a plurality of elongate filaments which are woven together. Each of the plurality of elongate filaments may have a diameter between about 0.0005 and about 0.005 inches. The implant includes at least some filaments consisting of nitinol and at least some composite filaments that are drawn filled tube wires comprising an external nitinol tube and a highly radiopaque material concentrically disposed within the external tube. The implant has at least about 40% composite filaments relative to a total number of filaments, and wherein a total number of filaments is about 10 to about 300.Type: GrantFiled: October 17, 2018Date of Patent: October 27, 2020Assignee: SEQUENT MEDICAL, INC.Inventors: Todd J. Hewitt, Brian E. Merritt, William R. Patterson
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Publication number: 20190192166Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include a resilient self-expanding permeable implant having a radially constrained elongated state configured for delivery within a catheter lumen and an expanded state with a longitudinally shortened configuration, and a plurality of elongate filaments which are woven together. Each of the plurality of elongate filaments may have a diameter between about 0.0005 and about 0.005 inches. The implant includes at least some filaments consisting of nitinol and at least some composite filaments that are drawn filled tube wires comprising an external nitinol tube and a highly radiopaque material concentrically disposed within the external tube. The implant has at least about 40% composite filaments relative to a total number of filaments, and wherein a total number of filaments is about 10 to about 300.Type: ApplicationFiled: October 17, 2018Publication date: June 27, 2019Applicant: Sequent Medical, Inc.Inventors: Todd J. Hewitt, Brian E. Merritt, William R. Patterson
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Patent number: 10136896Abstract: Devices for treatment of a cerebral aneurysm are described. Embodiments may include a self-expanding permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments that are woven together, which define a cavity of the permeable shell. The permeable shell includes composite filaments. The composite filaments include drawn filled tube wires have an external nitinol tube surrounding platinum concentrically disposed within the external nitinol tube. The composite filaments may have a diameter of between 0.00075? and 0.00125?.Type: GrantFiled: October 27, 2016Date of Patent: November 27, 2018Assignee: Sequent Medical, Inc.Inventors: Todd J Hewitt, Brian E Merritt, William R Patterson
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Publication number: 20180271540Abstract: A device for treatment of a vascular defect within a patient's vasculature includes a self-expanding permeable shell having a proximal end, a distal end, and a longitudinal axis, the shell comprising a plurality of elongate resilient filaments having a braided structure, wherein the filaments are secured at at least one of the proximal end or the distal end of the permeable shell, wherein the permeable shell has a radially constrained elongated state configured for delivery within a microcatheter and has an expanded state with an axially shortened configuration relative to the radially constrained state, the permeable shell having a plurality of openings formed between the braided filaments, wherein the permeable shell in its expanded state comprises a plurality of circumferentially-arrayed lobes.Type: ApplicationFiled: March 16, 2018Publication date: September 27, 2018Applicant: Sequent Medical, Inc.Inventors: Brian E. Merritt, Todd J. Hewitt
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Patent number: 9955976Abstract: Devices and methods for treatment of a patient's vasculature are described. The devices include implants made of woven braided mesh having a variable mesh density, i.e., the average size of pores in one region are a different than the average size of pores in another region. Additionally, there is a transition zone between the two regions. The implants have a low profile radially constrained state and an expanded state that is axially shortened. Methods of using the device to treat a cerebral aneurysm are also described. Methods of forming a tubular braid are also described. Methods of forming a tubular braid with variable braid densities are described. Methods of forming a tubular braid using a castellated mandrel are also described.Type: GrantFiled: April 10, 2015Date of Patent: May 1, 2018Assignee: Sequent Medical, Inc.Inventors: Todd J Hewitt, Brian Merritt, William R Patterson, James M Thompson, Claudio Plaza, Hung P Tran
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Patent number: 9629635Abstract: Methods and devices for removing a thrombus are described. The device includes an expandable cylindrical structure made of wires and a self-expanding permeable shell located at the distal end of the cylindrical structure. Methods and devices for treating a cerebral aneurysm are described. The device may include a distal self-expanding resilient permeable shell, a proximal self-expanding resilient permeable shell, and an elongate support member positioned between the distal and proximal permeable shells. The elongate support member may be rigid or may be a coil, such as an extension spring. The distal and proximal permeable shells may be made from a plurality of braided filaments, the shells having different pore sizes. The device may also be a braided implant with a force biasing component, such as a coil or generally circular extension, attached to its distal end.Type: GrantFiled: April 10, 2015Date of Patent: April 25, 2017Assignee: Sequent Medical, Inc.Inventors: Todd J Hewitt, Brian Merritt, William R Patterson, James M Thompson, Claudio Plaza, Hung P Tran
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Publication number: 20170095254Abstract: Devices for treatment of a cerebral aneurysm are described. Embodiments may include a self-expanding permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments that are woven together, which define a cavity of the permeable shell. The permeable shell includes composite filaments. The composite filaments include drawn filled tube wires have an external nitinol tube surrounding platinum concentrically disposed within the external nitinol tube. The composite filaments may have a diameter of between 0.00075? and 0.00125?.Type: ApplicationFiled: October 27, 2016Publication date: April 6, 2017Applicant: Sequent Medical, Inc.Inventors: TODD J. HEWITT, BRIAN E. MERRITT, WILLIAM R. PATTERSON
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Patent number: 9492174Abstract: Methods for treatment of a cerebral aneurysm are described. Methods include providing a self-expanding permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments that are woven together, which define a cavity of the permeable shell. The permeable shell includes composite filaments. The composite filaments may have a diameter of 0.00075?, 0.001?, 0.0015?, and/or 0.00125?. The permeable shell is advanced in the constrained state within a catheter. The permeable shell is then deploying the permeable shell within the cerebral aneurysm, wherein the permeable shell expands to the expanded state within the cerebral aneurysm. The catheter is then withdrawn after deploying the permeable shell.Type: GrantFiled: March 16, 2016Date of Patent: November 15, 2016Assignee: Sequent Medical, Inc.Inventors: Todd J Hewitt, Brian E Merritt, William R Patterson
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Publication number: 20160192941Abstract: Methods for treatment of a cerebral aneurysm are described. Methods include providing a self-expanding permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments that are woven together, which define a cavity of the permeable shell. The permeable shell includes composite filaments. The composite filaments may have a diameter of 0.00075?, 0.001?, 0.0015?, and/or 0.00125?. The permeable shell is advanced in the constrained state within a catheter. The permeable shell is then deploying the permeable shell within the cerebral aneurysm, wherein the permeable shell expands to the expanded state within the cerebral aneurysm. The catheter is then withdrawn after deploying the permeable shell.Type: ApplicationFiled: March 16, 2016Publication date: July 7, 2016Applicant: SEQUENT MEDICAL, INC.Inventors: Todd J. Hewitt, Brian E. Merritt, William R. Patterson
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Patent number: 9295473Abstract: Devices for treatment of a cerebral aneurysm are described. Embodiments may include a self-expanding permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments that are woven together, which define a cavity of the permeable shell. The permeable shell includes composite filaments. The composite filaments include drawn filled tube wires having an external nitinol tube and a highly radiopaque material concentrically disposed within the external tube. The composite filaments may have a diameter of 0.00075?, 0.001?, 0.0015?, and/or 0.00125?.Type: GrantFiled: September 30, 2015Date of Patent: March 29, 2016Assignee: SEQUENT MEDICAL, INC.Inventors: Todd J Hewitt, Brian E Merritt, William R Patterson
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Publication number: 20160015398Abstract: Devices for treatment of a cerebral aneurysm are described. Embodiments may include a self-expanding permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments that are woven together, which define a cavity of the permeable shell. The permeable shell includes composite filaments. The composite filaments include drawn filled tube wires having an external nitinol tube and a highly radiopaque material concentrically disposed within the external tube. The composite filaments may have a diameter of 0.00075?, 0.001?, 0.0015?, and/or 0.00125?.Type: ApplicationFiled: September 30, 2015Publication date: January 21, 2016Applicant: SEQUENT MEDICAL, INC.Inventors: TODD J HEWITT, BRIAN E MERRITT, WILLIAM R PATTERSON
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Patent number: 9198670Abstract: Methods for treatment of a cerebral aneurysm are described. Embodiments may include a self-expanding resilient permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments which are woven together, which define a cavity of the permeable shell. The permeable shell includes at least some filaments consisting of nitinol and at least some composite filaments. The composite filaments include drawn filled tube wires having an external nitinol tube and a highly radiopaque material concentrically disposed within the external tube.Type: GrantFiled: June 18, 2015Date of Patent: December 1, 2015Assignee: SEQUENT MEDICAL, INC.Inventors: Todd J Hewitt, Brian E Merritt, William R Patterson
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Publication number: 20150283363Abstract: Methods for treatment of a cerebral aneurysm are described. Embodiments may include a self-expanding resilient permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments which are woven together, which define a cavity of the permeable shell. The permeable shell includes at least some filaments consisting of nitinol and at least some composite filaments. The composite filaments include drawn filled tube wires having an external nitinol tube and a highly radiopaque material concentrically disposed within the external tube.Type: ApplicationFiled: June 18, 2015Publication date: October 8, 2015Applicant: SEQUENT MEDICAL, INC.Inventors: TODD J HEWITT, BRIAN E MERRITT, WILLIAM R PATTERSON
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Patent number: 9078658Abstract: Devices and methods for treatment of a patient's vasculature with some embodiments configured for delivery with a microcatheter for treatment of the cerebral vasculature of a patient. Embodiments may include a self-expanding resilient permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments which are woven together, which define a cavity of the permeable shell Some embodiments may include at least about 40% composite filaments having a high strength material and a highly radiopaque material. In some embodiments, the total cross sectional area of the highly radiopaque material is between about 11% and about 30% of the total cross sectional area of the plurality of elongate elements.Type: GrantFiled: August 14, 2014Date of Patent: July 14, 2015Assignee: SEQUENT MEDICAL, INC.Inventors: Todd J. Hewitt, Brian E. Merritt, William R. Patterson
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Publication number: 20140358178Abstract: Devices and methods for treatment of a patient's vasculature with some embodiments configured for delivery with a microcatheter for treatment of the cerebral vasculature of a patient. Embodiments may include a self-expanding resilient permeable shell having a radially constrained elongated state configured for delivery within a catheter lumen, an expanded state with a globular and longitudinally shortened configuration relative to the radially constrained state, and a plurality of elongate filaments which are woven together, which define a cavity of the permeable shell Some embodiments may include at least about 40% composite filaments having a high strength material and a highly radiopaque material. In some embodiments, the total cross sectional area of the highly radiopaque material is between about 11% and about 30% of the total cross sectional area of the plurality of elongate elements.Type: ApplicationFiled: August 14, 2014Publication date: December 4, 2014Inventors: Todd J. HEWITT, Brian E. MERRITT, William R. PATTERSON