Patents by Inventor Jeong Hwan Koh

Jeong Hwan Koh 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: 20230256386
    Abstract: Disclosed is a device including a chamber configured as a tubular body, the chamber being connected to a ground power source; a power supply device disposed outside the chamber and configured to continuously apply voltage having a magnitude set as direct current or alternating current; an emitter configured as a hollow tubular body having a plurality of cusps formed on an outer surface thereof and configured to generate plasma, the emitter being disposed in the chamber, elongated in a direction parallel to a flow direction of the processing target gas, electrically connected to the power supply device, and configured to generate nonthermal plasma; a rod configured to electrically connect the emitter and the power supply device and support the emitter; and an insulator configured to electrically insulate the rod and the chamber and prevent arcing from occurring between the rod and the chamber.
    Type: Application
    Filed: July 29, 2020
    Publication date: August 17, 2023
    Inventors: Won Tae KOH, Jeong Hwan KOH, Chang Soo SON
  • Patent number: 10797347
    Abstract: The present specification provides an electrolyte including a phthalate phosphine-type anion, an additive for a secondary battery including the electrolyte, and a secondary battery including the additive.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: October 6, 2020
    Assignee: LG Chem, Ltd.
    Inventor: Jeong Hwan Koh
  • Patent number: 10490852
    Abstract: The present specification relates to an additive for an electrochemical device including a compound having a silyloxy group, and an electrolyte, an electrode and an electrochemical device.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: November 26, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Minji Gu, Jeong Hwan Koh, Soojung Yeo, Myung Jin Chun
  • Publication number: 20170162904
    Abstract: The present specification relates to an additive for an electrochemical device including a compound having a silyloxy group, and an electrolyte, an electrode and an electrochemical device.
    Type: Application
    Filed: April 24, 2015
    Publication date: June 8, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Minji Gu, Jeong Hwan Koh, Soojung Yeo, Myung Jin Chun
  • Publication number: 20160218393
    Abstract: The present specification provides an electrolyte including a phthalate phosphine-type anion, an additive for a secondary battery including the electrolyte, and a secondary battery including the additive.
    Type: Application
    Filed: September 30, 2014
    Publication date: July 28, 2016
    Applicant: LG CHEM, LTD.
    Inventor: Jeong Hwan Koh
  • Patent number: 8535833
    Abstract: A non-aqueous electrolyte solution for a lithium secondary battery comprises a lithium salt and an organic solvent. The non-aqueous electrolyte solution further comprises a specific siloxane compound and a sulfonate compound. This non-aqueous electrolyte solution solves the capacity degradation phenomenon, which appears in a lithium secondary battery using a non-aqueous electrolyte solution containing only a specific siloxane compound when the lithium secondary battery is used for a long time, so this non-aqueous electrolyte solution is especially useful for high-capacity batteries.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: September 17, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Soo-Jin Kim, Jeong-Ju Cho, Su-Jin Yoon, Yong-Joon Ha, Chul-Haeng Lee, Jeong-Hwan Koh
  • Patent number: 8349502
    Abstract: Disclosed is an electrolyte comprising a compound having both a sulfonate group and a cyclic carbonate group. The electrolyte forms a more stable and dense SEI layer on the surface of an anode, and thus improves the capacity maintenance characteristics and lifespan characteristics of a battery. Also, disclosed is a compound represented by the following Formula 1, and a method for preparing the same by reacting 4-(hydroxyalkyl)-1,3-dioxolan-2-one with a sulfonyl halide compound: wherein each of R1 and R2 independently represents a C1˜C6 alkylene group optionally containing a C1˜C6 alkyl group or C2˜C6 alkenyl group introduced thereto; R3 is selected from the group consisting of a hydrogen atom, C1˜C20 alkyl group, C3˜C8 cyclic alkyl group, C2˜C6 alkenyl group, halo-substituted alkyl group, phenyl group and benzyl group.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: January 8, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Jeong Hwan Koh, Yong Joon Ha, Jin Hyun Park, Chul Haeng Lee, Young Min Lim, Jeong Ae Ahn, Dmitry Pogozhev
  • Publication number: 20120034532
    Abstract: A non-aqueous electrolyte solution for a lithium secondary battery comprises a lithium salt and an organic solvent. The non-aqueous electrolyte solution further comprises a specific siloxane compound and a sulfonate compound. This non-aqueous electrolyte solution solves the capacity degradation phenomenon, which appears in a lithium secondary battery using a non-aqueous electrolyte solution containing only a specific siloxane compound when the lithium secondary battery is used for a long time, so this non-aqueous electrolyte solution is especially useful for high-capacity batteries.
    Type: Application
    Filed: April 29, 2010
    Publication date: February 9, 2012
    Applicant: LG Chem, Ltd.
    Inventors: Soo-Jin Kim, Jeong-Ju Cho, Su-Jin Yoon, Yong-Joon Ha, Chul-Haeng Lee, Jeong-Hwan Koh
  • Publication number: 20090280414
    Abstract: Disclosed is an electrolyte comprising a compound having both a sulfonate group and a cyclic carbonate group. The electrolyte forms a more stable and dense SEI layer on the surface of an anode, and thus improves the capacity maintenance characteristics and lifespan characteristics of a battery. Also, disclosed is a compound represented by the following Formula 1, and a method for preparing the same by reacting 4-(hydroxyalkyl)-1,3-dioxolan-2-one with a sulfonyl halide compound: wherein each of R1 and R2 independently represents a C1˜C6 alkylene group optionally containing a C1˜C6 alkyl group or C2˜C6 alkenyl group introduced thereto; R3 is selected from the group consisting of a hydrogen atom, C1˜C20 alkyl group, C3˜C8 cyclic alkyl group, C2˜C6 alkenyl group, halo-substituted alkyl group, phenyl group and benzyl group.
    Type: Application
    Filed: September 20, 2007
    Publication date: November 12, 2009
    Inventors: Jeong Hwan Koh, Yong Joon Ha, Jin Hyun Park, Chul Haeng Lee, Young Min Lim, Jeong Ae Ahn, Dmitry Pogozhev
  • Publication number: 20060094808
    Abstract: Provided are a vinyl chloride resin composition containing a vinyl chloride monomer and an organo-modified metal oxide nanoparticle which can be used in exterior construction materials due to markedly improved thermal stability and weather resistance, which are considered weaknesses of vinyl chloride resins, and a method of preparing the same.
    Type: Application
    Filed: October 27, 2005
    Publication date: May 4, 2006
    Inventors: Youngjin Kim, Bhomri Kim, Chayeon Seo, Jeong Hwan Koh
  • Patent number: 6753443
    Abstract: The present invention relates to a process for preparing a chiral ester according to the formula (100): by reacting (i) a racemic alcohol, (ii) a selected ruthenium complex to activate racemization of the racemic alcohol, (iii) a lipase to selectively acylate one enantiomer of the racemic alcohol, and (iv) an acyl donor compound to supply an acyl group to the lipase.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: June 22, 2004
    Assignees: Samsung Fine Chemicals Co., Ltd., Pohang University of Science and Technology
    Inventors: Jai Wook Park, Mahn-Joo Kim, Jeong Hwan Koh, Hyun Min Jung
  • Patent number: 6475773
    Abstract: The present invention relates to a method for preparing a chiral ester and more particularly, the method for preparing an optically pure chiral ester from an alkenyl ester at a high yield by mixing and reacting: an alkenyl ester; a ruthenium complex to activate reduction reaction of said alkenyl ester and racemization; a lipase to acylate selectively one of enantiomers of said alkenyl ester; and a reducing agent to supply a hydride to said ruthenium complex. Said optically pure chiral ester of the present invention can be prepared by one-step synthesis from various types of alkenyl esters at a high yield.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: November 5, 2002
    Assignee: Samsung Fine Chemicals Co., Ltd.
    Inventors: Jai Wook Park, Mahn-Joo Kim, Jeong Hwan Koh, Hyun Min Jung
  • Publication number: 20010012898
    Abstract: The present invention relates to a method for preparing a chiral ester and more particularly, the method for preparing an optically pure chiral ester from an alkenyl ester at a high yield by mixing and reacting:
    Type: Application
    Filed: December 1, 2000
    Publication date: August 9, 2001
    Inventors: Jai Wook Park, Mahn-Joo Kim, Jeong Hwan Koh, Hyun Min Jung