Patents by Inventor John Vu
John Vu 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: 20250366859Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include a first permeable shell and a second permeable shell, where the second permeable shell sits within an interior cavity of the first permeable shell. The first and second permeable shells may each be made from a plurality of elongate filaments that are woven together to form a mesh. The mesh of the first permeable shell may have a larger mesh density and be softer than the mesh of the second permeable shell.Type: ApplicationFiled: August 13, 2025Publication date: December 4, 2025Inventors: John Vu, Nathan Luu, Todd Hewitt, Hung P. Tran
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Patent number: 12446891Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include a permeable implant having a radially constrained state configured for delivery within a catheter lumen, an expanded state, and a plurality of elongate filaments that are woven together. The implant may include a cavity in a proximal section that may optionally house embolic material, such as coils. Alternatively, the implant may have an expanded preset shape that is different than an expanded preset shape that is assumed after deployment in an aneurysm. The expanded preset shape may be frustoconical. Alternatively, the implant may include an outer skirt coupled to a proximal section of the permeable implant.Type: GrantFiled: August 26, 2022Date of Patent: October 21, 2025Assignee: MICROVENTION, INC.Inventors: Todd Hewitt, Parker Milhous, Hung P. Tran, John Vu
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Patent number: 12408925Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include a first permeable shell and a second permeable shell, where the second permeable shell sits within an interior cavity of the first permeable shell. The first and second permeable shells may each be made from a plurality of elongate filaments that are woven together to form a mesh. The mesh of the first permeable shell may have a larger mesh density and be softer than the mesh of the second permeable shell.Type: GrantFiled: July 13, 2023Date of Patent: September 9, 2025Assignee: MICROVENTION, INC.Inventors: John Vu, Nathan Luu, Todd Hewitt, Hung P. Tran
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Publication number: 20230385507Abstract: Systems, apparatuses and methods may provide for technology that receives parameter results and scores of one or more local sessions with respect to subcircuit components in a bounded area, aggregates the parameter results and scores, and generates a global placement model based on an output of the aggregated parameter results and scores.Type: ApplicationFiled: May 31, 2023Publication date: November 30, 2023Inventors: Jianfang Zhu, Adam Norman, Min Suet Lim, Miaomiao Ma, Mackenzie Norman, John Vu, Ching Leong Ooi, Eng Same Tan, Luis Carlos Alvarez Mata
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Publication number: 20230363763Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include a first permeable shell and a second permeable shell, where the second permeable shell sits within an interior cavity of the first permeable shell. The first and second permeable shells may each be made from a plurality of elongate filaments that are woven together to form a mesh. The mesh of the first permeable shell may have a larger mesh density and be softer than the mesh of the second permeable shell.Type: ApplicationFiled: July 13, 2023Publication date: November 16, 2023Inventors: John Vu, Nathan Luu, Todd Hewitt, Hung P. Tran
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Patent number: 11732183Abstract: Compositions and methods of fracturing including a hydrophobic rendered proppant or a proppant slurry and a fracturing fluid including an aqueous base fluid, a viscosifying agent or mixture of viscosifying agents, and an enhancing proppant suspending composition including an aldehyde, a mixture of aldehydes, a ketone, a mixture of ketones, or mixtures thereof, and optionally a crosslinking agent or a mixture of crosslinking agents.Type: GrantFiled: May 24, 2022Date of Patent: August 22, 2023Assignee: NexTier Completion Solutions Inc.Inventors: Sarkis Kakadjian, John Vu, Vidya Sagar Bammidi
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Publication number: 20230258055Abstract: A trigger including a carrier, a shuttle movably disposed on the carrier, an energy member disposed between the carrier and the shuttle, a degrade-on-demand trip member disposed to maintain potential energy in the energy member until activated. A method for operating a downhole tool including sending a signal to the trip member of the trigger, degrading the trip member, converting potential energy stored in the energy member from potential energy to kinetic energy, and actuating the downhole tool with the shuttle. A wellbore system including a borehole in a subsurface formation, a string in the borehole, a trigger disposed within or as a part of the string.Type: ApplicationFiled: February 11, 2022Publication date: August 17, 2023Applicant: Baker Hughes Oilfield Operations LLCInventors: Zhihui Zhang, Guijun Deng, John Vu, Emerson Nunez
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Patent number: 11702903Abstract: An actuator for another tool includes a housing that is either modular and attachable to the tool or may be incorporated into the another tool. Within the housing is a biasing member that may be retained in a compressed condition by a retainer. A trigger holding the retainer, the trigger having a trigger head anchorable to the housing, a separation neck having a helical groove therein and a trigger body, the body being connected to the retainer, the trigger being defeatable on command.Type: GrantFiled: April 6, 2021Date of Patent: July 18, 2023Assignee: BAKER HUGHES OILFIELD OPERATIONS LLCInventors: Daniel Sequera, John Vu, Daniel Ewing
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Publication number: 20230114169Abstract: Devices and methods for treatment of a patient’s vasculature are described. Embodiments may include a permeable implant having a radially constrained state configured for delivery within a catheter lumen, an expanded state, and a plurality of elongate filaments that are woven together. The implant may include a cavity in a proximal section that may optionally house embolic material, such as coils. Alternatively, the implant may have an expanded preset shape that is different than an expanded preset shape that is assumed after deployment in an aneurysm. The expanded preset shape may be frustoconical. Alternatively, the implant may include an outer skirt coupled to a proximal section of the permeable implant.Type: ApplicationFiled: August 26, 2022Publication date: April 13, 2023Inventors: Todd Hewitt, Parker Milhous, Hung P. Tran, John Vu, Hussain S. Rangwala, Hiroshi Shiono
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Publication number: 20220372365Abstract: Compositions and methods of fracturing including a hydrophobic rendered proppant or a proppant slurry and a fracturing fluid including an aqueous base fluid, a viscosifying agent or mixture of viscosifying agents, and an enhancing proppant suspending composition including an aldehyde, a mixture of aldehydes, a ketone, a mixture of ketones, or mixtures thereof, and optionally a crosslinking agent or a mixture of crosslinking agents.Type: ApplicationFiled: May 24, 2022Publication date: November 24, 2022Applicant: NexTier Completion Solutions Inc.Inventors: Sarkis Kakadjian, John Vu, Vidya Sagar Bammidi
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Publication number: 20220316298Abstract: An actuator including a housing, a biasing member within the housing, a retainer configured to retain the biasing member in a biased position, and a trigger holding the retainer, the trigger being defeatable on command.Type: ApplicationFiled: April 6, 2021Publication date: October 6, 2022Applicant: Baker Hughes Oilfield Operations LLCInventors: Daniel Sequera, John Vu, Daniel Ewing
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Publication number: 20220257260Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include an implant having multiple mesh layers. A first and second layer of the implant may be formed by folding over a single mesh and the third layer may be formed from a different mesh. The first, second, and third layers may be either a stasis or a structural layer and may be arranged in different orders. Embodiments may also include structures to assist in the expansion of the device. These structures may include an expandable loop or reinforcing finger extensions. Embodiments may also include a corrugation or ridge around a middle section of the implant to assist in deployment.Type: ApplicationFiled: December 14, 2021Publication date: August 18, 2022Inventors: Todd Hewitt, Joseph Emery, Hung Tran, John Vu, Karishma Desai, Parker Milhous
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Publication number: 20220257258Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include a permeable implant such as a permeable shell or mesh having a radially constrained state configured for delivery within a catheter lumen, an expanded state, and a plurality of elongate filaments that are woven together. The permeable implant may include a stiffer proximal portion that is configured to sit at the neck of an aneurysm. The stiffer proximal portion may include additional mesh layers on either the inside or the outside of a first permeable shell. The distal portion of the device may be softer and deformable.Type: ApplicationFiled: April 27, 2022Publication date: August 18, 2022Inventors: Todd Hewitt, Parker Milhous, Joseph Emery, Hung Tran, John Vu, Hussain S. Rangwala, William R. Patterson
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Patent number: 11390797Abstract: Compositions and methods of fracturing including a hydrophobic rendered proppant or a proppant slurry and a fracturing fluid including an aqueous base fluid, a viscosifying agent or mixture of viscosifying agents, and an enhancing proppant suspending composition including an aldehyde, a mixture of aldehydes, a ketone, a mixture of ketones, or mixtures thereof, and optionally a crosslinking agent or a mixture of crosslinking agents.Type: GrantFiled: April 24, 2020Date of Patent: July 19, 2022Assignee: NexTier Completion Solutions Inc.Inventors: Sarkis Kakadjian, John Vu, Vidya Sagar Bammidi
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Patent number: 11317921Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include a permeable implant such as a permeable shell or mesh having a radially constrained state configured for delivery within a catheter lumen, an expanded state, and a plurality of elongate filaments that are woven together. The permeable implant may include a stiffer proximal portion that is configured to sit at the neck of an aneurysm. The stiffer proximal portion may include additional mesh layers on either the inside or the outside of a first permeable shell. The distal portion of the device may be softer and deformable.Type: GrantFiled: March 12, 2020Date of Patent: May 3, 2022Assignee: SEQUENT MEDICAL, INC.Inventors: Todd Hewitt, Parker Milhous, Joseph Emery, Hung Tran, John Vu, Hussain S. Rangwala, William R. Patterson
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Publication number: 20210282789Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include a first permeable shell and a second permeable shell, where the second permeable shell sits within an interior cavity of the first permeable shell. The first and second permeable shells may each be made from a plurality of elongate filaments that are woven together to form a mesh. The mesh of the first permeable shell may have a larger mesh density and be softer than the mesh of the second permeable shell.Type: ApplicationFiled: March 10, 2021Publication date: September 16, 2021Inventors: John Vu, Nathan Luu, Todd Hewitt, Hung P. Tran
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Publication number: 20200354627Abstract: Compositions and methods of fracturing including a hydrophobic rendered proppant or a proppant slurry and a fracturing fluid including an aqueous base fluid, a viscosifying agent or mixture of viscosifying agents, and an enhancing proppant suspending composition including an aldehyde, a mixture of aldehydes, a ketone, a mixture of ketones, or mixtures thereof, and optionally a crosslinking agent or a mixture of crosslinking agents.Type: ApplicationFiled: April 24, 2020Publication date: November 12, 2020Applicant: NexTier Completion Solutions Inc.Inventors: Sarkis Kakadjian, John Vu, Vidya Sagar Bammidi
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Publication number: 20200289126Abstract: Devices and methods for treatment of a patient's vasculature are described. Embodiments may include a permeable implant such as a permeable shell or mesh having a radially constrained state configured for delivery within a catheter lumen, an expanded state, and a plurality of elongate filaments that are woven together. The permeable implant may include a stiffer proximal portion that is configured to sit at the neck of an aneurysm. The stiffer proximal portion may include additional mesh layers on either the inside or the outside of a first permeable shell. The distal portion of the device may be softer and deformable.Type: ApplicationFiled: March 12, 2020Publication date: September 17, 2020Inventors: Todd Hewitt, Parker Milhous, Joseph Emery, Hung Tran, John Vu, Hussain S. Rangwala, William R. Patterson
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Patent number: 10513911Abstract: A bottom hole assembly supports a diverter for landing in an existing multilateral junction. Once landed set down weight allows the BHA to progress through the diverter opening into a main bore, for example. A protective sleeve for the seal assembly lands on a shoulder above the targeted seal bore. Further advancing of the BHA moves the seal assembly out of the protective sleeve that has landed on the shoulder by the polished bore. Once the seals are in position in the bore a treatment can be accomplished. On picking up the seal assembly retracts into the protective sleeve and the BHA engages the diverter to bring the BHA and the diverter out of the borehole at the same time.Type: GrantFiled: August 9, 2016Date of Patent: December 24, 2019Assignee: BAKER HUGHES, A GE COMPANY, LLCInventors: John Vu, Bryan P. Pendleton, Basil J. Palakapilly, Deshuttaney Mosley, Christopher Cook
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Patent number: 10508519Abstract: An adjustable tubular string nose uses axially relatively movable wedge segments to form a variable diameter ring shape using technology described in U.S. Pat. No. 7,128,146 in another context. The nose has a seat around a passage therethrough. After insertion of the nose into a first bore, typically a main bore, the nose is retracted out of the main bore and pressure against a seated bore in the nose expands the nose radially to a degree where re-entry into the main bore is precluded but entry into a lateral bore is still possible. The string advances onto a lateral no-go. This signals surface personnel to pick up and raise pressure to blow the seated ball through the seat to again open the passage in the nose. A seal stack behind the nose in advanced into a lateral seal bore and the treatment can then commence.Type: GrantFiled: October 26, 2016Date of Patent: December 17, 2019Assignee: BAKER HUGHES, A GE COMPANY, LLCInventors: Bryan P. Pendleton, Joseph E. Sheehan, John Vu, Shannon Martin, Deshuttaney Mosley, Mark J. Knebel