Patents by Inventor Sangchul Roh

Sangchul Roh 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).

  • Patent number: 12209203
    Abstract: Fractal-like polymeric particles having a hierarchical, branched structure are disclosed. The particles have fibers with nanometer-scale diameters on their peripheries, which enables a number of unique and highly desirable properties. The particles are fabricated by a method combining phase separation and shear forces of different solutions, in particular a polymer solution. In addition, the particles may be used as coatings, nonwovens, textiles and viscosity modifiers and adhesives, among other applications.
    Type: Grant
    Filed: March 18, 2022
    Date of Patent: January 28, 2025
    Assignee: North Carolina State University
    Inventors: Orlin D. Velev, Sangchul Roh
  • Publication number: 20240279551
    Abstract: Compositions comprising liquid crystal composition(s) and isotropic liquid composition(s), and optionally, one or more salt(s) and methods of using same. In various examples, a composition is a bistable liquid crystalline emulsion. In various examples, a composition exhibits reversible emulsification and/or demulsification when subjected to an electric field. An optical device can comprise the composition(s). In various examples, device is an optical device, such as, for example, a light shutter, which may be a bistable light shutter or the like, a display, a television, a sensor, a window, which may be a smart window, an energy efficient window, a privacy window, or the like, a smart label, an electronic paper, an electrooptical device, or the like.
    Type: Application
    Filed: June 7, 2022
    Publication date: August 22, 2024
    Inventors: Nicholas L. Abbott, Sangchul Roh
  • Publication number: 20240076509
    Abstract: Fractal-like polymeric particles having a hierarchical, branched structure are disclosed. The particles have fibers with nanometer-scale diameters on their peripheries, which enables a number of unique and highly desirable properties. The particles are fabricated by a method combining phase separation and shear forces of different solutions, in particular a polymer solution. In addition, the particles may be used as coatings, nonwovens, textiles and viscosity modifiers and adhesives, among other applications.
    Type: Application
    Filed: March 18, 2022
    Publication date: March 7, 2024
    Inventors: Orlin D. Velev, Sangchul Roh
  • Patent number: 11643563
    Abstract: The present disclosure relates to compositions and methods for three-dimensional printing.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: May 9, 2023
    Assignee: North Carolina State University
    Inventors: Orlin D. Velev, Sangchul Roh
  • Patent number: 11306214
    Abstract: Fractal-like polymeric particles having a hierarchical, branched structure are disclosed. The particles have fibers with nanometer-scale diameters on their peripheries, which enables a number of unique and highly desirable properties. The particles are fabricated by a method combining phase separation and shear forces of different solutions, in particular a polymer solution. In addition, the particles may be used as coatings, nonwovens, textiles and viscosity modifiers and adhesives, among other applications.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: April 19, 2022
    Assignee: North Carolina State University
    Inventors: Orlin D. Velev, Sangchul Roh
  • Publication number: 20190264046
    Abstract: The present disclosure relates to compositions and methods for three-dimensional printing.
    Type: Application
    Filed: July 13, 2017
    Publication date: August 29, 2019
    Inventors: Orlin D. Velev, Sangchul Roh
  • Publication number: 20190153247
    Abstract: Fractal-like polymeric particles having a hierarchical, branched structure are disclosed. The particles have fibers with nanometer-scale diameters on their peripheries, which enables a number of unique and highly desirable properties. The particles are fabricated by a method combining phase separation and shear forces of different solutions, in particular a polymer solution. In addition, the particles may be used as coatings, nonwovens, textiles and viscosity modifiers and adhesives, among other applications.
    Type: Application
    Filed: May 9, 2017
    Publication date: May 23, 2019
    Inventors: Orlin D. Velev, Sangchul Roh