Patents by Inventor Yong- Hak Park

Yong- Hak Park 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: 20240132717
    Abstract: A thermoplastic resin composition for an air intake hose has improved heat resistance by mixing a mixed resin including a thermoplastic polyether-ester elastomer and polybutylene terephthalate, a styrene-acrylonitrile resin, and additives in appropriate amounts, and a molded article including the same. This thermoplastic resin composition includes a mixed resin including a thermoplastic polyether-ester elastomer and polybutylene terephthalate, a styrene-acrylonitrile resin, an epoxy-based compatibilizer, a chain extender, an antioxidant, a thermal stabilizer including at least one selected from the group consisting of an imide-based stabilizer, an oxazoline-based stabilizer, and combinations thereof, a light stabilizer, and a filler.
    Type: Application
    Filed: May 15, 2023
    Publication date: April 25, 2024
    Inventors: Young Hak Jang, Jong Min Park, Yong Jun Cho, Hoon Jeong Kim
  • Publication number: 20240136560
    Abstract: The present invention relates to a microbial fuel cell using an electron absorber having high reduction potential, and a method of generating electric energy using same, and more specifically, to: a microbial fuel cell in which an electron absorber solution having high reduction potential is used as a reduction electrolyte, an organic solution that is an electron donor is used as an oxidization electrolyte, the reduced reduction electrolyte is regenerated through electrolysis in an electrolysis battery and re-supplied to the reduction electrolyte, a separation membrane provided with one or more O-rings in order to prevent leakage is included, hydrogen gas generated from the electrolysis can be supplied to a fuel cell to generate additional electric energy, such that a large quantity of electric power can be generated cost-efficiently, energy from an existing electricity generation system, such as solar electric energy.
    Type: Application
    Filed: October 12, 2020
    Publication date: April 25, 2024
    Inventor: Yong Hak PARK
  • Publication number: 20240103438
    Abstract: A method and a system thereof for producing a digital holographic screen based on multi-hogel printing are proposed. The system includes a light source unit including lasers, a dichroic mirror for RGB three color matching, mirrors, a beam splitter, and an optical shutter, an object beam unit including a spatial filter, a lens, and a mirror, a reference beam unit including a spatial filter, a lens, and a mirror, a diffuser fixing unit including a diffuser holder and a diffuser positioned between the object beam unit and a recording material and configured to scatter and diffuse the object beam, a photomask movement unit including a photomask holder, an XY-translation stage, and a photomask positioned between the reference beam unit and the recording medium and on which a grid-shaped on/off binary pattern is printed, and a controller configured to control the optical shutter and the XY-translation stage.
    Type: Application
    Filed: November 11, 2021
    Publication date: March 28, 2024
    Inventors: Dong Hak SHIN, Yong Seok OH, Jae Hong KIM, Jong sung JUNG, Jae Woo PARK, Jun Yong CHOI
  • Patent number: 7063938
    Abstract: A method of preparing patterned colloidal crystals includes filling a monomer solution in the interstices between particles of planar colloidal crystals for photopolymerization inside them, and performing a selective photopolymerization process between the colloidal crystals using a mask. In one exemplary method, a first monomer solution for photopolymerization is filled inside planar colloidal crystals. A first selective photopolymerization process is performed inside the colloidal crystals using a mask. A second monomer solution for photopolymerization is filled into the firstly patterned colloidal crystals. At least one additional photopolymerization process is performed inside the firstly patterned colloidal crystals using an additional mask. Through this method, colloidal crystalline regions oriented in the same direction with different refractive indexes can be controlled in a level of ?m. Further, repeated patterns can be inexpensively and easily prepared.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: June 20, 2006
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Seung-Man Yang, Ki-Ra Yi, Yong- Hak Park, Sarah Kim
  • Publication number: 20040146811
    Abstract: Disclosed is a method of preparing patterned colloidal crystals, including filling a monomer solution in the interstices between particles of planar colloidal crystals for photopolymerization inside them, and performing a selective photopolymerization process between the colloidal crystals using a mask. Alternatively, a method of preparing patterned colloidal crystals, including filling a first monomer solution for photopolymerization inside planar colloidal crystals, performing a first selective photopolymerization process inside the colloidal crystals using a mask, and filling a second monomer solution for photopolymerization into firstly patterned colloidal crystals, followed by performing at least one photopolymerization process inside the firstly patterned colloidal crystals using an additional mask. By the above method, colloidal crystalline regions oriented in the same direction with different refractive indexes can be controlled in a level of &mgr;m.
    Type: Application
    Filed: September 12, 2003
    Publication date: July 29, 2004
    Inventors: Seung-Man Yang, Ki-Ra Yi, Yong-Hak Park, Sarah Kim
  • Patent number: D720360
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: December 30, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-Woong Bae, Kwang-Hyun Ko, Yong-Hak Park
  • Patent number: D720365
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: December 30, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-Woong Bae, Kwang-Hyun Ko, Yong-Hak Park
  • Patent number: D732552
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: June 23, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-Woong Bae, Kwang-Hyun Ko, Yong-Hak Park
  • Patent number: D735217
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: July 28, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-Woong Bae, Kwang-Hyun Ko, Yong-Hak Park
  • Patent number: D905731
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: December 22, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-Woong Bae, Kwang-Hyun Ko, Yong-Hak Park