Patents by Inventor Jung-Eun Yang

Jung-Eun Yang 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: 10961521
    Abstract: The present invention relates to a recombinant microorganism to which a gene coding for 2-hydroxyisocaproate-CoA transferase and a gene coding for polyhydroxyalkanoate synthase are introduced and which has a potential of producing polyhydroxyalkanoate bearing an aromatic monomer or a long-chain 2-HA monomer and a method for producing polyhydroxyalkanoate bearing an aromatic monomer or a long-chain 2-HA monomer, using the recombinant microorganism. According to the present invention, a biodegradable polymer bearing an aromatic monomer or a long-chain 2-HA monomer can be produced.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: March 30, 2021
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Sang Yup Lee, Jung Eun Yang, Si Jae Park
  • Publication number: 20190352622
    Abstract: The present invention relates to a recombinant microorganism to which a gene coding for 2-hydroxyisocaproate-CoA transferase and a gene coding for polyhydroxyalkanoate synthase are introduced and which has a potential of producing polyhydroxyalkanoate bearing an aromatic monomer or a long-chain 2-HA monomer and a method for producing polyhydroxyalkanoate bearing an aromatic monomer or a long-chain 2-HA monomer, using the recombinant microorganism. According to the present invention, a biodegradable polymer bearing an aromatic monomer or a long-chain 2-HA monomer can be produced.
    Type: Application
    Filed: February 26, 2018
    Publication date: November 21, 2019
    Inventors: Sang Yup LEE, Jung Eun YANG, Si Jae PARK
  • Publication number: 20140061609
    Abstract: Provided are novel compounds in accordance with Formula I for an organic electronic material and an organic electroluminescent device using same. The compound for an organic electronic material disclosed herein exhibits high electron transport efficiency and thus prevents crystallization upon manufacturing a device, and also facilitates the formation of a layer, thus improving current properties of the device. Thereby, OLED devices having improved power efficiency as well as reduced operating voltage can be manufactured.
    Type: Application
    Filed: October 13, 2011
    Publication date: March 6, 2014
    Inventors: Nam Kyun Kim, Seok-Keun Yoon, Jin Hee Kim, Hyo Jung Lee, Mi Ja Lee, Hee Choon Ahn, Doo-Hyeon Moon, Jung-Eun Yang, Hee Sook Kim, Soo-Jin Hwang, Young Jun Cho, Kyung Joo Lee, Hyuck Joo Kwon, Bong Ok Kim
  • Patent number: 8309276
    Abstract: The present invention discloses a process for preparing catalyst solution for a membrane-electrode assembly in a fuel cell, which comprises the steps of a) mixing a catalyst solution (Solution A) wherein catalyst particles are dispersed in water and an ion conductive resin solution (Solution B) wherein an ion conductive resin is dissolved in water, low boiling point organic solvent or a mixture thereof, to form a dispersion; b) mixing the dispersion obtained from step a) with functional additive dissolved in high boiling point solvent or a mixture of low boiling point solvent arid water (Solution C) to prepare catalyst ink dispersion; and c) aging the catalyst ink dispersion obtained from step b).
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: November 13, 2012
    Assignee: Hanwha Chemical Corporation
    Inventors: Byungchul Jang, Young Taek Kim, Jung-Eun Yang, Youngsu Jiong, Dong Hwan Ryu, Min-Ho Seo
  • Publication number: 20100330463
    Abstract: The present invention discloses a process for preparing catalyst solution for a membrane-electrode assembly in a fuel cell, which comprises the steps of a) mixing a catalyst solution (Solution A) wherein catalyst particles are dispersed in water and an ion conductive resin solution (Solution B) wherein an ion conductive resin is dissolved in water, low boiling point organic solvent or a mixture thereof, to form a dispersion; b) mixing the dispersion obtained from step a) with functional additive dissolved in high boiling point solvent or a mixture of low boiling point solvent arid water (Solution C) to prepare catalyst ink dispersion; and c) aging the catalyst ink dispersion obtained from step b).
    Type: Application
    Filed: November 6, 2007
    Publication date: December 30, 2010
    Applicant: HANWHA CHEMICAL CORPORATION
    Inventors: Byungchul Jang, Young Taek Kim, Jung-Eun Yang, Youngsu Jiong, Dong Hwan Ryu, Min-Ho Seo
  • Publication number: 20090202885
    Abstract: The present invention relates to a porous electrode used in a polymer electrolyte membrane fuel cell, and more particularly to a method of preparing a membrane-electrode assembly by forming a self-stand electrode layer by coating catalyst ink on a non-conductive substrate having a macropore and then joining it to a polymer electrolyte membrane. The porous self-stand electrode according to the present invention allows moisture and gas to be smoothly discharged and inflowed in a high current density operation region to improve the performance of a fuel cell, and can be freely cutted to simplify the preparation process of the membrane-electrode assembly.
    Type: Application
    Filed: December 3, 2008
    Publication date: August 13, 2009
    Inventors: Young Taek Kim, Min-ho Seo, Byungchul Jang, Dong Hwan Ryu, Jung-Eun Yang, Youngsu Jiong
  • Patent number: 7173155
    Abstract: The present invention relates to a terphenyl dihalide monomer having sulfonate groups and a process for preparing the same. More particularly, the present invention relates to a terphenyl dihalide monomer having sulfonate groups prepared by a process comprising obtaining a terphenyl dihalide derivative by Suzuki cross-coupling of a tetrahalobenzene and phenylboronic acid and introducing sulfonate groups into the phenyl rings at each end of the terphenyl dihalide derivative, the resultant monomer capable of being prepared into a polymer electrolyte having superior ion conductivity through nucleophilic aromatic substitution (SNAr) polymerization due to the presence of two halogen atoms and two conducting sulfonate groups in the monomer molecule, and a process for preparing the same.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: February 6, 2007
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Jae-Suk Lee, Sun-Young Chang, Kwan-Soo Lee, Myung-Hwan Jeong, Jung-Eun Yang