Patents by Inventor Christopher Cheung

Christopher Cheung 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: 20250171672
    Abstract: The present invention relates to a nano-encapsulated phase-change material (nano-PCM), its preparation method, and its applications thereof. The nano-PCM includes at least one phase change core material; an inner polymeric shell; and an outer inorganic shell. The outer inorganic shell surrounds the inner polymeric shell. The nano-PCM offers enhanced thermal stability, efficient heat transfer, and improved dispersion in materials like fabrics and plastics due to its small size and large surface area. It provides thermal regulation for various products, such as clothing and packaging, by storing and releasing energy to buffer temperature fluctuations. Additionally, nano-PCM outperforms micro-PCM in thermal stability, mechanical performance, and lifespan, making it ideal for high-temperature processes and multiple thermal cycles.
    Type: Application
    Filed: November 26, 2024
    Publication date: May 29, 2025
    Inventors: Xiyao ZHANG, Kang ZHANG, Christopher Cheung YEC, Jifan LI, Lun LOU, Yuping CHANG
  • Patent number: 12252842
    Abstract: An energy dissipating fiber and fabric for protective textile application, which can absorb energy during shocking, stretching and vibration. The disclosed fiber/fabric can include a polymer matrix, a shear-thickening material and a reinforcing filler.
    Type: Grant
    Filed: May 24, 2022
    Date of Patent: March 18, 2025
    Assignee: Nano and Advanced Materials Institute Limited
    Inventors: Kang Zhang, Christopher Cheung Yec, Jian Zhang, Shilong Zhang, Xiyao Zhang, Jifan Li
  • Publication number: 20240110315
    Abstract: The present invention provides a composition and method for forming polymeric multifilaments having a filament diameter of no more than 10 ?m with a high tensile strength and toughness. The composition includes at least one semi-crystalline thermoplastic polymer and a nucleating agent to stabilize the multifilaments during melt-spinning and facilitate phase transformation of the thermoplastic polymer in subsequent drawing and annealing cycles. The method includes a quenching step for the melt-spun filaments immediately after the melt-spinning and collection of the quenched filaments with a specific winding speed to decrease the filament diameter. The subsequent drawing and annealing cycles further enhance the mechanical properties of the filaments after the quenching.
    Type: Application
    Filed: August 29, 2023
    Publication date: April 4, 2024
    Inventors: Kang ZHANG, Christopher Cheung YEC, Shilong ZHANG, Jifan LI
  • Publication number: 20240003106
    Abstract: An impact dissipating bollard system includes a vertical stanchion and a composite energy-absorbing deformable cartridge configured to be positioned within a retaining foundation that includes a rigid core portion including a stanchion-receiving aperture and first and second projections extending from the rigid core portion. The first and second projections, together with the core portion, form the dumbbell shape. Energy-absorbing resilient elastic material surrounds the rigid core portion and is positioned within recesses within the first and second projections. The bollard system is configured such that impact energy is transferred from the vertical stanchion to deform the composite energy-absorbing deformable cartridge. The bollard system retaining foundation includes a reinforcing frame embedded in concrete and having a strength of least 30 MPa.
    Type: Application
    Filed: August 11, 2023
    Publication date: January 4, 2024
    Inventors: Kang ZHANG, Xiyao ZHANG, Meishan CHAN, Shilong ZHANG, Christopher Cheung YEC, Pak Chung LAU, Jifan LI, Jian ZHANG, Jianzhuo XIN, Jianying MIAO
  • Patent number: 11674021
    Abstract: Flame retardant composition including: an optionally crosslinked rubber, an intumescent composition comprising a phosphate and a melamine polymer formed by combining melamine, formaldehyde, dicyandiamide, and aluminum hydroxide thereby forming the intumescent composition, a ceramic forming mixture, at least one glass additive, layered silicate nanoparticles, and optionally an antioxidant; and methods of preparation and use thereof.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: June 13, 2023
    Assignee: Nano and Advanced Materials Institute Limited
    Inventors: Bin Xiao, Christopher Cheung Yec, Han Wang, Jianzhuo Xin, Jifan Li
  • Patent number: 11618819
    Abstract: Provided herein are energy absorbing composites including a thermoplastic resin, a dilatant, a compatibilizer, a reinforcing filler, and optionally an antioxidant and methods of preparation thereof.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: April 4, 2023
    Assignee: Nano and Advanced Materials Institute Limited
    Inventors: Kang Zhang, Christopher Cheung Yec, Xiyao Zhang, Jian Zhang, Shilong Zhang, Jifan Li
  • Publication number: 20220380977
    Abstract: An energy dissipating fiber and fabric for protective textile application, which can absorb energy during shocking, stretching and vibration. The disclosed fiber/fabric can include a polymer matrix, a shear-thickening material and a reinforcing filler.
    Type: Application
    Filed: May 24, 2022
    Publication date: December 1, 2022
    Inventors: Kang ZHANG, Christopher Cheung YEC, Jian ZHANG, Shilong ZHANG, Xiyao ZHANG, Jifan LI
  • Publication number: 20220356387
    Abstract: A burst-resistant, dispersible nano-encapsulated phase-change material includes at least one phase change core material and a shell. The shell includes the reaction product of a plurality of non-phase change materials comprising at least one monomer, an initiator, a crosslinker and at least one surfactant. The shell surrounds at least one phase change core material and is formed by low-energy emulsification followed by polymerization of a mixture of the phase change core material and the plurality of non-phase change materials in water. The mass ratio between at least one phase change core material and the plurality of non-phase change materials is 5-15:10. The nano-encapsulated phase-change material after said low-energy emulsification and polymerization has a particle size ranging between 50 and 500 nm and a heat of fusion of 60 J/g or greater.
    Type: Application
    Filed: April 27, 2022
    Publication date: November 10, 2022
    Inventors: Kang ZHANG, Xiyao ZHANG, Christopher Cheung YEC, Shilong ZHANG, Jian ZHANG, Jifan LI
  • Publication number: 20210238406
    Abstract: Provided herein are energy absorbing composites including a thermoplastic resin, a dilatant, a compatibilizer, a reinforcing filler, and optionally an antioxidant and methods of preparation thereof.
    Type: Application
    Filed: January 29, 2021
    Publication date: August 5, 2021
    Inventors: Kang ZHANG, Christopher Cheung YEC, Xiyao ZHANG, Jian ZHANG, Shilong ZHANG, Jifan LI
  • Publication number: 20200377704
    Abstract: Provided herein are flame retardant composition and methods of preparation and use thereof.
    Type: Application
    Filed: May 28, 2020
    Publication date: December 3, 2020
    Inventors: Bin XIAO, Christopher Cheung YEC, Han WANG, Jianzhuo XIN, Jifan LI
  • Patent number: 9111371
    Abstract: A 3D modeling workflow system is disclosed that allows the user to create multiple 2D planes or paint canvases in the 3D scene each having a position and orientation. These 2D planes can be arbitrarily positioned in the 3D scene and can contain a combination of paint and model construction geometry. The construction geometry can span multiple 2D planes. The user is allowed to sketch on the planes using paint and create curve geometry in and between the planes using the sketches as a reference. Collectively the 2D planes allow a 3D object to be represented with different types of input where portions of the object are drawn in by paint and other or the same portions are composed of geometry. The user can swap between painting on the 2D planes and creating model geometry as needed.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: August 18, 2015
    Assignee: AUTODESK, INC.
    Inventors: Sriram Dayanand, Michael Carey Daum, Christopher Cheung
  • Publication number: 20070080960
    Abstract: A 3D modeling workflow system is disclosed that allows the user to create multiple 2D planes or paint canvases in the 3D scene each having a position and orientation. These 2D planes can be arbitrarily positioned in the 3D scene and can contain a combination of paint and model construction geometry. The construction geometry can span multiple 2D planes. The user is allowed to sketch on the planes using paint and create curve geometry in and between the planes using the sketches as a reference. Collectively the 2D planes allow a 3D object to be represented with different types of input where portions of the object are drawn in by paint and other or the same portions are composed of geometry. The user can swap between painting on the 2D planes and creating model geometry as needed.
    Type: Application
    Filed: October 6, 2005
    Publication date: April 12, 2007
    Applicant: ALIAS SYSTEMS CORP.
    Inventors: Sriram Dayanand, Michael Daum, Christopher Cheung