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).

  • METHOD FOR MANUFACTURING SEPARATOR, SEPARATOR MANUFACTURED THEREBY, AND ELECTROCHEMICAL DEVICE COMPRISING SAME
    Publication number: 20190173069
    Abstract: A method for preparing a separator, a separator prepared using the same, and an electrochemical device including the same. More specifically, stability of the separator may be reinforced by preparing the separator using a slurry prepared by pre-dispersing an inorganic material and a dispersion resin, and then mixing a binder thereto when preparing the separator.
    Type: Application
    Filed: January 18, 2018
    Publication date: June 6, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Hyejin KWON, Houngsik YOO, Su Jin YOON, Dong Hyun KIM, Hyeon CHOI, Jean LEE
  • Method For Producing Super Absorbent Polymer And Super Absorbent Polymer
    Publication number: 20190134602
    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: Application
    Filed: June 15, 2017
    Publication date: May 9, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Ki Youl YOON, Hyo Sook JOO, Gi Cheul KIM, Hyeon CHOI, Ju Eun KIM
  • ULTRASONIC DIAGNOSTIC DEVICE AND CONTROL METHOD THEREFOR
    Publication number: 20190125300
    Abstract: Provided is an ultrasound diagnostic apparatus including a probe configured to induce displacement in tissue of an object by irradiating a first focused beam of a first frequency to the object; and a processor configured to obtain a first ultrasound image of the object in which displacement has been induced; to determine whether the induced displacement is appropriate based on the obtained first ultrasound image; when the induced displacement is not appropriate, to control the probe to irradiate a second focused beam of a second frequency different from the first frequency to the object, so as to induce displacement in the tissue of the object; and to process a second ultrasound image of the object in which displacement has been induced by the second focused beam.
    Type: Application
    Filed: November 4, 2016
    Publication date: May 2, 2019
    Inventors: Dong-geon KONG, Seong-hyeon CHOI, Hyoung-ki LEE
  • Super Absorbent Polymer And Preparation Method Thereof
    Publication number: 20190126240
    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: Application
    Filed: January 31, 2018
    Publication date: May 2, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Ki Youl Yoon, Hyo Sook Joo, Gi Cheul Kim, Hyeon Choi, Ju Eun Kim
  • Porous Super Absorbent Polymer And Preparation Method Thereof
    Publication number: 20190119452
    Abstract: The present disclosure relates to a preparation method of a porous super absorbent polymer exhibiting excellent absorption performance and improved absorption rate due to a novel pore structure, and a porous super absorbent polymer prepared therefrom. The porous super absorbent polymer includes a base resin powder including a cross-linked polymer of a water soluble ethylene-based unsaturated monomer containing acidic groups which are at least partially neutralized, and an inorganic filler contained in the cross-linked structure of the cross-linked polymer, wherein the base resin powder includes a plurality of pores having a diameter of a sub-micron (sub-?m) scale in the cross-linked structure, and an interconnected pore structure in the form of an open channel in which 90% or more of the pores are connected to each other.
    Type: Application
    Filed: December 15, 2017
    Publication date: April 25, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Ki Youl Yoon, Hyo Sook Joo, Gi Cheul Kim, Hyeon Choi, Ju Eun Kim
  • Superabsorbent polymer and method for preparing the same
    Patent number: 10258962
    Abstract: The present invention relates to superabsorbent polymer and a method for preparing the same. More specifically, the present invention relates to superabsorbent polymer with improved properties, comprising a dual cross-linking structure derived from alkyleneglycol multifunctional (meth)acrylate and modified nanoclay, and a method for preparing the same. According to the present invention, the modified nanoclay and alkyleneglycol multifunctional (meth)acrylate are used as internal crosslinking agents in the process of preparing superabsorbent polymer, thus contributing to improvement in the cross-linking degree and the properties of superabsorbent polymer.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: April 16, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Ju Eun Kim, Gi Cheul Kim, Sung Soo Park, Hyeon Choi, Hee Jung Choi, Hyo Sook Joo, Ki Youl Yoon
  • Preparation Method Of Porous Super Absorbent Polymer
    Publication number: 20190085104
    Abstract: The present disclosure relates to a preparation method of a porous super absorbent polymer including the steps of preparing a monomer neutralized solution by adding an internal cross-linking agent, an initiator, an inorganic filler, and a nonionic surfactant to a neutralized solution obtained by neutralizing at least 80 mol % of a water soluble ethylene-based unsaturated monomer containing acidic groups; high-shear mixing the monomer neutralized solution; preparing a hydrogel polymer from the high-shear mixed monomer neutralized solution by thermal polymerization or photopolymerization; and preparing a base resin powder by drying, pulverizing, and classifying the hydrogel polymer.
    Type: Application
    Filed: December 13, 2017
    Publication date: March 21, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Ki Youl Yoon, Hyo Sook Joo, Gi Cheul Kim, Hyeon Choi, Ju Eun Kim
  • Method and device for controlling access of terminal for efficient use of resources in mobile communication system
    Patent number: 10237876
    Abstract: Embodiments of the present disclosure provide terminal connection control method and apparatus in a base station of a mobile communication system which supports a Carrier Aggregation (CA) function.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: March 19, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam-Ryul Jeon, Ki-Back Kim, Han-Seok Kim, Hyun-Ho Im, Ji-Hyeon Choi
  • A Method For Preparing Superabsorbent Polymer, And Superabsorbent Polymer
    Publication number: 20190077927
    Abstract: The present invention relates to a method for preparing superabsorbent polymer that introduces a plate type and rod-shaped clay additive in the superabsorbent polymer, and thus exhibits basic properties of a superabsorbent polymer equivalent to or much better than the existing superabsorbent polymer through multi-crosslinking, and particularly, can improve absorbency under pressure (AUP), and a superabsorbent polymer obtained thereby.
    Type: Application
    Filed: June 21, 2017
    Publication date: March 14, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Ki Youl Yoon, Hyo Sook Joo, Gi Cheul Kim, Hyeon Choi, Ju Eun Kim
  • CARBON NANOTUBE DISPERSION LIQUID AND MANUFACTURING METHOD THEREOF
    Publication number: 20190051887
    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: Application
    Filed: August 26, 2016
    Publication date: February 14, 2019
    Inventors: Houngsik YOO, Jong Won LEE, Dong Hyun KIM, Gyemin KWON, Byoung Hoon AHN, Yelin KIM, Sang Hoon CHOY, Hyeon CHOI, Jungkeun YOO
  • Coupling body using Z-pin
    Patent number: 10184212
    Abstract: Coupling body devices, including methods of making the same, are provided and described. A method of manufacturing a coupling body, for example, can include forming a tube by braiding nonmetal fibers, forming a flange by rolling inwards an end of the tube, providing a metallic connector, inserting at least one Z-pin in an end portion of the connector, and coupling the tube and the connector by inserting the Z-pin in the flange and performing a composite material forming process.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: January 22, 2019
    Assignee: Korea Aerospace Research Institute
    Inventors: Ik Hyeon Choi, Ho Sung Lee, Gi Hyuk Choi, In Hee Hwang
  • Heating element having communication window
    Patent number: 10165627
    Abstract: Disclosed is a heating element, including: a substrate; a first bus bar provided on the substrate; a second bus bar which is provided on the substrate so as to be opposite to the first bus bar; and a heating pattern which is provided to electrically connect the first bus bar and the second bus bar, wherein the heating pattern includes a first pattern region which is in contact with the first bus bar and a second pattern region which is in contact with each of the second bus bar and the first pattern region and the first pattern region has an opening region which serves as a communication window.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: December 25, 2018
    Assignee: LG CHEM, LTD.
    Inventor: Hyeon Choi
  • COMPOSITION FOR TREATING OR PREVENTING LIVER DISEASES, CONTAINING SICYOS ANGULATUS EXTRACT AS ACTIVE INGREDIENT
    Publication number: 20180360897
    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: Application
    Filed: December 9, 2016
    Publication date: December 20, 2018
    Applicant: 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: 10141574
    Abstract: The present disclosure relates to a carbon nanotube dispersion including 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 Mathematical Formula 1, a method for preparing the same, and methods for preparing electrode slurry and an electrode using the same.
    Type: Grant
    Filed: September 5, 2016
    Date of Patent: November 27, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Houngsik Yoo, Kyungyeon Kang, Jongheon Seol, Jong Won Lee, Dong Hyun Kim, Gyemin Kwon, Jihee Woo, Yelin Kim, Dong Hyun Cho, Sang Hoon Choy, Hyeon Choi
  • Organic zinc catalyst, preparation method thereof, and method of preparing poly(alkylene carbonate) resin using the same
    Patent number: 10100147
    Abstract: An organic zinc catalyst having more uniform and fine particle size and showing more improved activity in a polymerization process for the preparation of a poly(alkylene carbonate) resin and a preparation method thereof, and a method of preparing a poly(alkylene carbonate) resin using the organic zinc catalyst, are provided. The preparation method of the organic zinc catalyst includes the steps of surface-treating a zinc precursor with a dispersant, and reacting the surface-treated zinc precursor with dicarboxylic acid to form a zinc dicarboxylate-based catalyst.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: October 16, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Seong Kyun Kang, Sung-Kyoung Kim, Jun Wye Lee, Eun Kyoung Park, Seung Young Park, Hyeon Choi
  • CARBON NANOTUBE DISPERSION AND METHOD FOR PRODUCING SAME
    Publication number: 20180269485
    Abstract: The present disclosure relates to a carbon nanotube dispersion liquid comprising bundle-type carbon nanotubes; a dispersion medium; and a polyvinyl butyral resin having a weight average molecular weight of greater than 50,000, a method for preparing the same, methods for preparing electrode slurry and an electrode using the same, and an electrode and a secondary battery prepared using the carbon nanotube dispersion liquid.
    Type: Application
    Filed: July 27, 2016
    Publication date: September 20, 2018
    Applicant: LG CHEM, LTD.
    Inventors: Houngsik YOO, Jongheon SEOL, Jong Won LEE, Dong Hyun KIM, Gyemin KWON, Yelin KIM, Jungkeun YOO, Dong Hyun CHO, Sang Hoon CHOY, Hyeon CHOI, Kyungyeon KANG, Jihee WOO
  • CARBON BLACK DISPERSION SOLUTION AND MANUFACTURING METHOD THEREFOR
    Publication number: 20180251638
    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: Application
    Filed: August 26, 2016
    Publication date: September 6, 2018
    Applicant: 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
  • Film for tire inner liner, method for manufacturing film for tire inner liner, pneumatic tire, and method for manufacturing pneumatic tire
    Patent number: 10065405
    Abstract: This disclosure relates to a film for a tire inner liner film that may exhibit uniform excellent physical properties over all directions when applied to a tire, and may secure excellent durability and fatigue resistance in a tire manufacturing process or in an automobile running process, a method for manufacturing the film for a tire inner liner, a pneumatic tire using the tire inner liner film, and a method for manufacturing the pneumatic tire using the tire inner liner film.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: September 4, 2018
    Assignee: KOLON INDUSTRIES, INC.
    Inventors: Yun-Jo Kim, Si-Min Kim, Dong-Jin Kim, Il Chung, Dong-Hyeon Choi
  • Preparation method of organic zinc catalyst and poly(alkylene carbonate) resin
    Patent number: 10047032
    Abstract: The present invention relates to a preparation method of an organic zinc catalyst capable of preparing an organic zinc catalyst having a finer and more uniform particle size and more improved activity during a polymerization process for preparing a poly(alkylene carbonate) resin, and a preparation method of a poly(alkylene carbonate) resin using the organic zinc catalyst. The preparation method of an organic zinc catalyst includes reacting a zinc precursor and a dicarboxylic acid in the presence of a dispersant to form a zinc dicarboxylate-based catalyst, wherein a reaction step is performed under a condition at which the number of moles of the dicarboxylic acid present in a reaction system is larger than that of the zinc precursor throughout the entire reaction step.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: August 14, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Sung Kyoung Kim, Seong Kyun Kang, Jun Wye Lee, Seung Young Park, Hyeon Choi
  • CARBON NANOTUBE DISPERSION LIQUID AND MANUFACTURING METHOD THEREOF
    Publication number: 20180226650
    Abstract: The present disclosure relates to a carbon nanotube dispersion including 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 Mathematical Formula 1, a method for preparing the same, and methods for preparing electrode slurry and an electrode using the same.
    Type: Application
    Filed: September 5, 2016
    Publication date: August 9, 2018
    Inventors: Houngsik YOO, Kyungyeon KANG, Jongheon SEOL, Jong Won LEE, Dong Hyun KIM, Gyemin KWON, Jihee WOO, Yelin KIM, Dong Hyun CHO, Sang Hoon CHOY, Hyeon CHOI