Patents by Inventor Hyeon Choi

Hyeon Choi 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).

  • Super absorbent polymer and preparation method thereof
    Patent number: 10843169
    Abstract: The present disclosure relates to a super absorbent polymer, including: a base resin powder comprising a first cross-linked polymer of a water soluble ethylene-based unsaturated monomer containing acidic groups which are at least partially neutralized; and a surface cross-linked layer comprising a second cross-linked polymer further cross-linked from the first cross-linked polymer and formed on the base resin powder, wherein the first cross-linked polymer is bound to a porous zeolite in which a mesopore having a BET surface area of at least 100 m2/g and a porosity of at least 0.2 cm3/g is formed, and a preparation method thereof.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: November 24, 2020
    Inventors: Ki Youl Yoon, Hyo Sook Joo, Gi Cheul Kim, Hyeon Choi, Ju Eun Kim
  • SLURRY COMPOSITION FOR COATING SECONDARY BATTERY SEPARATOR AND SECONDARY BATTERY SEPARATOR PREPARED USING SAME
    Publication number: 20200358064
    Abstract: A slurry composition for coating a secondary battery separator, a separator prepared using the same, and a secondary battery including the separator, wherein the slurry composition includes a phenolic compound including two or more aromatic rings, inorganic particles, a binder, and a solvent.
    Type: Application
    Filed: December 5, 2018
    Publication date: November 12, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Gye Min KWON, Houng Sik YOO, Hyeon CHOI, Da Kyung HAN, Je An LEE
  • Carbon black dispersion solution and manufacturing method therefor
    Patent number: 10822498
    Abstract: The present disclosure relates to a carbon black dispersion solution comprising carbon black, a dispersion medium, and partially hydrogenated nitrile rubber having a residual double bond (RDB) value of 0.5% by weight to 40% by weight calculated according to the following Mathematical Formula 1, wherein dispersed particle diameters of the carbon black have particle size distribution D50 of 0.1 ?m to 2 ?m, a method for preparing the same, and methods for preparing electrode slurry and an electrode using the same.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: November 3, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Gyemin Kwon, Houngsik Yoo, Hye Lim Sim, Byoung Hoon Ahn, Jong Won Lee, Dong Hyun Kim, Sang Hoon Choy, Hyeon Choi
  • Method for producing super absorbent polymer and super absorbent polymer
    Patent number: 10807067
    Abstract: The present invention relates to a super absorbent polymer having a controlled degree of internal crosslinking and thereby having simultaneously improved basic absorption capacity and absorbency under pressure, and a method for producing the same. The super absorbent polymer may comprise a base polymer powder including a cross-linked polymer of a monomer containing a water-soluble ethylenically unsaturated compound or its salt; and a surface cross-linked layer that is formed on the base polymer powder and is further cross-linked from the cross-linked polymer, wherein a glass hollow particle having a micron-scale particle size is included in the cross-linked structure of the cross-linked polymer of the base polymer powder.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: October 20, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Ki Youl Yoon, Hyo Sook Joo, Gi Cheul Kim, Hyeon Choi, Ju Eun Kim
  • Preparation Method For Super Absorbent Polymer Sheet
    Publication number: 20200324270
    Abstract: A method of preparing a superabsorbent polymer sheet by polymerization of monomers in the presence of an encapsulated foaming agent and an inorganic foaming agent is provided. According to the method of preparing the superabsorbent polymer sheet of the present invention, a porous and flexible superabsorbent polymer sheet having an excellent initial absorption rate may be prepared.
    Type: Application
    Filed: April 30, 2019
    Publication date: October 15, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Kiyoul Yoon, Hyeon Choi, Gicheul Kim, Seongkyun Kang, Ju Eun Kim
  • Method for producing super absorbent polymer and super absorbent polymer
    Patent number: 10799851
    Abstract: The present invention relates to a super absorbent polymer having more improved absorbency under pressure and liquid permeability, and a method for producing the same. The super absorbent polymer comprises a base polymer powder including a cross-linked polymer of a monomer containing a water-soluble ethylenically unsaturated compound or its salt; and a surface cross-linked layer that is formed on the base polymer powder and is further cross-linked from the cross-linked polymer, wherein a glass hollow particle having a micron-scale particle size is included on the surface cross-linked layer.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: October 13, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Ki Youl Yoon, Hyo Sook Joo, Gi Cheul Kim, Hyeon Choi, Ju Eun Kim
  • Structure of shield cover and display device including the same
    Patent number: 10795193
    Abstract: A display device includes a display module, a circuit board, and a shield cover. The display module includes a display panel. The circuit board is disposed under the display module and is connected to a first side of the display panel. The shield cover includes a body portion, a side portion, and a first support portion. The body portion is disposed under the circuit board. The side portion extends in an upward direction from a first side of the body portion along a first side surface of the display module, the first side surface of the display module being adjacent to the first side of the display panel. The first support portion protrudes in the upward direction from a second side of the body portion adjacent to the first side of the body portion, the first support portion contacting a lower surface of the display module.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: October 6, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Byoung Jin Jin, Seung Jae Kang, Dong Jin Park, Jong Hyeon Choi
  • BACK SHEET FOR SOLAR MODULE AND MANUFACTURING METHOD THEREFOR
    Publication number: 20200313018
    Abstract: Provided are a backsheet for a solar cell module and a manufacturing method thereof. More particularly, the present invention relates to a novel backsheet for a photovoltaic module capable of replacing a structure in which a fluoride film/a polyethylene terephthalate (PET) film/a fluoride film or a white polyester film/a transparent polyester film/a white polyethylene film are stacked according to the related art with a single layer polyester film, and capable of being used in a double-sided light receiving photovoltaic module as well as a general front-sided light receiving photovoltaic module to replace a glass or fluorine-based polymer resin.
    Type: Application
    Filed: June 27, 2017
    Publication date: October 1, 2020
    Applicant: KOLON INDUSTRIES, INC.
    Inventor: Dong-Hyeon CHOI
  • SOLID HYDROGEN STORAGE DEVICE
    Publication number: 20200278085
    Abstract: A solid hydrogen storage device provides an improved heat-transfer efficiency by improving the contact properties between heat-exchange tubes and heat-transfer fins. The solid hydrogen storage device includes a heat-transfer fin including a plurality of tube through holes, a heating tube, and a cooling tube. The heating tube and the cooling tube respectively extend through the tube through holes, and the heating tube and the cooling tube have different coefficients of thermal expansion.
    Type: Application
    Filed: November 20, 2019
    Publication date: September 3, 2020
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Ji Hye PARK, Kyung Moon LEE, Dong Hoon NAM, Young Jin CHO, Seung Hyeon CHOI, Yun Su LEE, Hoon Mo PARK
  • CONTROLLED-RELEASE TYPE FERTILIZER WITH DECREASED FLOATING PROPERTY COMPRISING TRI-BLOCK COPOLYMER AND METHOD FOR PREPARING THE SAME
    Publication number: 20200270184
    Abstract: The present invention relates to a controlled-release type fertilizer with outstandingly decreased floating property, comprising a granular fertilize core; a coating layer (shell) formed on the surface of the granular fertilizer core, and comprising olefin-based resin; and additives attached on the coating layer, and comprising ethylene oxide-propylene oxide-ethylene oxide(EO-PO-EO) or propylene oxide-ethylene oxide-propylene oxide(PO-EO-PO) tri-block copolymer.
    Type: Application
    Filed: September 13, 2018
    Publication date: August 27, 2020
    Applicants: LG CHEM, LTD., FarmHannong Co., Ltd.
    Inventors: Mihee KIM, Hyosook JOO, Eun Kyoung PARK, Hyeon CHOI, Kiyoul YOON, Joon Seok LEE
  • A CONTROLLED-RELEASE TYPE FERTILIZER WITH DECREASED FLOATING PROPERTY COMPRISING POLYOXYETHYLENE ALKY(-ARYL) ETHER AND METHOD FOR PREPARING THE SAME
    Publication number: 20200270185
    Abstract: The present invention relates to a controlled-release type fertilizer with remarkably decreased floating property, comprising a granular fertilizer core; a coating layer (shell) formed on the surface of the granular fertilizer core, and comprising olefin-based resin; and additives attached on the coating layer, and comprising polyoxyethylene alkyl(-aryl)ether.
    Type: Application
    Filed: September 13, 2018
    Publication date: August 27, 2020
    Applicants: LG CHEM, LTD., FarmHannong Co., Ltd.
    Inventors: Mihee KIM, Hyosook JOO, Eun Kyoung PARK, Hyeon CHOI, Kiyoul YOON, Joon Seok LEE
  • NANOCOMPOSITE FOR HYDROGEN PRODUCTION HAVING IMPROVED LIFESPAN PERFORMANCE AND MANUFACTURING METHOD THEREOF
    Publication number: 20200261892
    Abstract: Disclosed are a nanocomposite including a catalytic material and a porous support having a structure of a blocky structure, a spherical structure, and a combination thereof and a manufacturing method thereof. The nanocomposite may have improved the lifespan performance while being applied to the oxidation-reduction reaction of a high temperature.
    Type: Application
    Filed: October 15, 2019
    Publication date: August 20, 2020
    Inventors: Seung Hyeon Choi, Kyung Moon Lee, Dong Hoon Nam, Hoon Mo Park, Ji Min Lee, Yong Ho Choa, Joo Hyun Park
  • COMPOSITE NANOFIBER CATALYST HAVING IMPROVED LIFESPAN PERFORMANCE AND MANUFACTURING METHOD THEREOF
    Publication number: 20200261890
    Abstract: Disclosed is a catalyst of a fiber form having improved the lifespan performance while being applied to the oxidation-reduction reaction of a high temperature and a manufacturing method thereof. Particularly, disclosed is a composite nanofiber catalyst including a support having a fiber form and a metal catalyst included in the support and a manufacturing method thereof.
    Type: Application
    Filed: October 15, 2019
    Publication date: August 20, 2020
    Inventors: Seung Hyeon Choi, Kyung Moon Lee, Dong Hoon Nam, Hoon Mo Park, Ji Min Lee, Yong Ho Choa, Joo Hyun Park
  • Method for producing super absorbent polymer and super absorbent polymer
    Patent number: 10744483
    Abstract: The present invention relates to a super absorbent polymer having more improved absorbency under pressure and liquid permeability, and a method for producing the same. The super absorbent polymer comprises a base polymer powder including a cross-linked polymer of a monomer containing a water-soluble ethylenically unsaturated compound or its salt; and a surface cross-linked layer that is formed on the base polymer powder and is further cross-linked from the cross-linked polymer, wherein a glass hollow particle having a micron-scale particle size is included on the surface cross-linked layer.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: August 18, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Ki Youl Yoon, Hyo Sook Joo, Gi Cheul Kim, Hyeon Choi, Ju Eun Kim
  • NEGATIVE ELECTRODE SLURRY COMPOSITION FOR LITHIUM SECONDARY BATTERY, AND METHOD FOR PREPARING THE SAME
    Publication number: 20200259162
    Abstract: A negative electrode slurry composition including (1) clay particles having, a plate-type structure and an average particle diameter (D50) of 10 nm to 2 ?m, (2) carboxymethylcellulose (CMC), (3) a negative electrode active material, and (4) an aqueous solvent, wherein a weight ratio of the carboxymethylcellulose and the clay particles is 9.5:0.5 to 4:6. The negative electrode slurry composition is capable of solving problems due to the deterioration of storage stability and dispersibility of solids in a negative electrode slurry composition haying a high solid content.
    Type: Application
    Filed: November 6, 2018
    Publication date: August 13, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jong Won LEE, Houng Sik YOO, Hyeon CHOI
  • Method of Preparing Superabsorbent Polymer Sheet
    Publication number: 20200239666
    Abstract: Provided is a method of preparing a superabsorbent polymer sheet, including polymerization of monomers in the presence of an encapsulated foaming agent and an inorganic foaming agent. According to the method of preparing the superabsorbent polymer sheet of the present invention, a porous flexible superabsorbent polymer sheet may be prepared.
    Type: Application
    Filed: September 10, 2019
    Publication date: July 30, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Kiyoul Yoon, Seongkyun Kang, Gicheul Kim, Hyeon Choi, Ju Eun Kim
  • METHODS FOR NONDESTRUCTIVE MEASUREMENTS OF THICKNESS OF UNDERLYING LAYERS
    Publication number: 20200208964
    Abstract: A method for nondestructive measurement of an underlying layer thickness includes irradiating, with a pump laser pulse, a sample to induce generation of an acoustic wave in the sample such that the acoustic wave propagates through the sample over time, where the sample includes a substrate, an underlying layer on the substrate, and an overlying layer on the underlying layer and the underlying layer is isolated from an exterior of the sample by at least the overlying layer, irradiating the sample with a probe laser pulse after irradiating the sample with the pump laser pulse, determining a reflectance variation of the sample over time, based on monitoring a variation of a reflection of the probe laser pulse from the sample over time, to generate a first graph showing a variation of reflectance of the sample over time, and determining a thickness of the underlying layer based on the first graph.
    Type: Application
    Filed: December 16, 2019
    Publication date: July 2, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Duck-mahn OH, Jong-an Kim, Si-hyeon Choi, Young-hoon Sohn, Yu-sin Yang, Chi-hoon Lee
  • Composition for treating or preventing liver diseases, containing sicyos angulatus extract as active ingredient
    Patent number: 10695390
    Abstract: The present invention relates to: a composition comprising a Sicyos angulatus extract or a fraction thereof as an effective ingredient for preventing, alleviating, or treating liver diseases; and a method for preventing or treating liver diseases, comprising a step of administering the composition to a subject suspected of having a liver disease.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: June 30, 2020
    Assignee: KOREA RESEARCH INSTITUTE OF BIOSCIENCE AND BIOTECHNOLOGY
    Inventors: Chul Ho Lee, Yong-Hoon Kim, Jung Ran Noh, Dong Hui Choi, Jung Hwan Hwang, Kyoung Shim Kim, Yun-Jung Seo, In-Bok Lee, Jung-Hyeon Choi
  • Carbon nanotube dispersion liquid and manufacturing method thereof
    Patent number: 10686185
    Abstract: The present disclosure relates to a carbon nanotube dispersion including entangled-type carbon nanotubes, a dispersion medium, and partially hydrogenated nitrile rubber having a residual double bond (RDB) value of 0.5% by weight to 40% by weight calculated according to the following Mathematical Formula 1, wherein dispersed particle diameters of the carbon nanotubes have particle size distribution D50 of 2 ?m to 5 ?m, a method for preparing the same, and methods for preparing electrode slurry and an electrode using the same.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: June 16, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Houngsik Yoo, Jong Won Lee, Dong Hyun Kim, Gyemin Kwon, Byoung Hoon Ahn, Yelin Kim, Sang Hoon Choy, Hyeon Choi, Jungkeun Yoo
  • SYSTEM AND METHOD FOR PRODUCING HYDROGEN USING BY PRODUCT GAS
    Publication number: 20200172395
    Abstract: Disclosed is a system for producing hydrogen from a byproduct gas generated during a steelmaking process or a coal chemistry process, including a reformer for reforming the byproduct gas using steam (H2O), a separator for separating a reformed gas supplied from the reformer into a reduction gas and hydrogen gas (H2), a first reactor for reducing ferric oxide (Fe2O3) into ferrous oxide (FeO) using the reduction gas supplied from the separator, and a second reactor for producing ferrous-ferric oxide (Fe3O4) and hydrogen gas (H2) by mixing the ferrous oxide (FeO) supplied from the first reactor with steam (H2O), wherein the concentration of hydrogen gas (H2) in the reformed gas discharged from the reformer is higher than the concentration of hydrogen gas (H2) in the byproduct gas.
    Type: Application
    Filed: November 13, 2019
    Publication date: June 4, 2020
    Inventors: Seung Hyeon CHOI, Kyung Moon LEE, Jung Joo PARK, Hoon Mo PARK, Gwang Woo HAN, Joong Myeon BAE, Ji Woo OH