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).

  • Publication number: 20250366859
    Abstract: 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: Application
    Filed: August 13, 2025
    Publication date: December 4, 2025
    Inventors: John Vu, Nathan Luu, Todd Hewitt, Hung P. Tran
  • Patent number: 12446891
    Abstract: 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: Grant
    Filed: August 26, 2022
    Date of Patent: October 21, 2025
    Assignee: MICROVENTION, INC.
    Inventors: Todd Hewitt, Parker Milhous, Hung P. Tran, John Vu
  • Patent number: 12408925
    Abstract: 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: Grant
    Filed: July 13, 2023
    Date of Patent: September 9, 2025
    Assignee: MICROVENTION, INC.
    Inventors: John Vu, Nathan Luu, Todd Hewitt, Hung P. Tran
  • Publication number: 20230385507
    Abstract: 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: Application
    Filed: May 31, 2023
    Publication date: November 30, 2023
    Inventors: Jianfang Zhu, Adam Norman, Min Suet Lim, Miaomiao Ma, Mackenzie Norman, John Vu, Ching Leong Ooi, Eng Same Tan, Luis Carlos Alvarez Mata
  • Publication number: 20230363763
    Abstract: 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: Application
    Filed: July 13, 2023
    Publication date: November 16, 2023
    Inventors: John Vu, Nathan Luu, Todd Hewitt, Hung P. Tran
  • Patent number: 11732183
    Abstract: 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: Grant
    Filed: May 24, 2022
    Date of Patent: August 22, 2023
    Assignee: NexTier Completion Solutions Inc.
    Inventors: Sarkis Kakadjian, John Vu, Vidya Sagar Bammidi
  • Publication number: 20230258055
    Abstract: 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: Application
    Filed: February 11, 2022
    Publication date: August 17, 2023
    Applicant: Baker Hughes Oilfield Operations LLC
    Inventors: Zhihui Zhang, Guijun Deng, John Vu, Emerson Nunez
  • Patent number: 11702903
    Abstract: 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: Grant
    Filed: April 6, 2021
    Date of Patent: July 18, 2023
    Assignee: BAKER HUGHES OILFIELD OPERATIONS LLC
    Inventors: Daniel Sequera, John Vu, Daniel Ewing
  • Publication number: 20230114169
    Abstract: 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: Application
    Filed: August 26, 2022
    Publication date: April 13, 2023
    Inventors: Todd Hewitt, Parker Milhous, Hung P. Tran, John Vu, Hussain S. Rangwala, Hiroshi Shiono
  • Publication number: 20220372365
    Abstract: 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: Application
    Filed: May 24, 2022
    Publication date: November 24, 2022
    Applicant: NexTier Completion Solutions Inc.
    Inventors: Sarkis Kakadjian, John Vu, Vidya Sagar Bammidi
  • Publication number: 20220316298
    Abstract: 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: Application
    Filed: April 6, 2021
    Publication date: October 6, 2022
    Applicant: Baker Hughes Oilfield Operations LLC
    Inventors: Daniel Sequera, John Vu, Daniel Ewing
  • Publication number: 20220257260
    Abstract: 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: Application
    Filed: December 14, 2021
    Publication date: August 18, 2022
    Inventors: Todd Hewitt, Joseph Emery, Hung Tran, John Vu, Karishma Desai, Parker Milhous
  • Publication number: 20220257258
    Abstract: 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: Application
    Filed: April 27, 2022
    Publication date: August 18, 2022
    Inventors: Todd Hewitt, Parker Milhous, Joseph Emery, Hung Tran, John Vu, Hussain S. Rangwala, William R. Patterson
  • Patent number: 11390797
    Abstract: 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: Grant
    Filed: April 24, 2020
    Date of Patent: July 19, 2022
    Assignee: NexTier Completion Solutions Inc.
    Inventors: Sarkis Kakadjian, John Vu, Vidya Sagar Bammidi
  • Patent number: 11317921
    Abstract: 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: Grant
    Filed: March 12, 2020
    Date of Patent: May 3, 2022
    Assignee: SEQUENT MEDICAL, INC.
    Inventors: Todd Hewitt, Parker Milhous, Joseph Emery, Hung Tran, John Vu, Hussain S. Rangwala, William R. Patterson
  • Publication number: 20210282789
    Abstract: 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: Application
    Filed: March 10, 2021
    Publication date: September 16, 2021
    Inventors: John Vu, Nathan Luu, Todd Hewitt, Hung P. Tran
  • Publication number: 20200354627
    Abstract: 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: Application
    Filed: April 24, 2020
    Publication date: November 12, 2020
    Applicant: NexTier Completion Solutions Inc.
    Inventors: Sarkis Kakadjian, John Vu, Vidya Sagar Bammidi
  • Publication number: 20200289126
    Abstract: 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: Application
    Filed: March 12, 2020
    Publication date: September 17, 2020
    Inventors: Todd Hewitt, Parker Milhous, Joseph Emery, Hung Tran, John Vu, Hussain S. Rangwala, William R. Patterson
  • Patent number: 10513911
    Abstract: 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: Grant
    Filed: August 9, 2016
    Date of Patent: December 24, 2019
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: John Vu, Bryan P. Pendleton, Basil J. Palakapilly, Deshuttaney Mosley, Christopher Cook
  • Patent number: 10508519
    Abstract: 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: Grant
    Filed: October 26, 2016
    Date of Patent: December 17, 2019
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Bryan P. Pendleton, Joseph E. Sheehan, John Vu, Shannon Martin, Deshuttaney Mosley, Mark J. Knebel