Patents by Inventor Won-jang Jeong

Won-jang Jeong 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).

  • HETEROCYCLIC COMPOUND AND ORGANIC LIGHT EMITTING ELEMENT USING SAME
    Publication number: 20190263834
    Abstract: The present application relates to a hetero-cyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.
    Type: Application
    Filed: November 24, 2017
    Publication date: August 29, 2019
    Applicant: HEESUNG MATERIAL LTD.
    Inventors: Won-Jang JEONG, Yun-Ji LEE, Gi-Back LEE, Jin-Seok CHOI, Dae-Hyuk CHOI, Joo-Dong LEE
  • HETEROCYCLIC COMPOUND, AND ORGANIC LIGHT-EMITTING DEVICE USING SAME
    Publication number: 20190233398
    Abstract: The present application provides a hetero-cyclic compound capable of significantly enhancing lifespan, efficiency, electrochemical stability and thermal stability of an organic light emitting device, and an organic light emitting device containing the hetero-cyclic compound in an organic compound layer.
    Type: Application
    Filed: July 6, 2017
    Publication date: August 1, 2019
    Applicant: HEESUNG MATERIAL LTD.
    Inventors: Han-Kook OH, Jun-Tae MO, Yong-Geun JUNG, Won-Jang JEONG, Jin-Seok CHOI, Dae-Hyuk CHOI, Joo-Dong LEE
  • HETEROCYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING SAME
    Publication number: 20180366652
    Abstract: The present application provides a hetero-cyclic compound which may significantly improve the service life, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device in which the hetero-cyclic compound is contained in an organic compound layer.
    Type: Application
    Filed: December 1, 2016
    Publication date: December 20, 2018
    Applicant: HEESUNG MATERIAL LTD.
    Inventors: Jun-Tae MO, Yong-Geun JUNG, Won-Jang JEONG, Dae-Hyuk CHOI, Joo-Dong LEE
  • HETEROCYCLIC COMPOUND AND ORGANIC LIGHT EMITTING ELEMENT USING SAME
    Publication number: 20180323379
    Abstract: The present application provides a hetero-cyclic compound which may significantly improve the service life, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device in which the hetero-cyclic compound is contained in an organic compound layer.
    Type: Application
    Filed: November 8, 2016
    Publication date: November 8, 2018
    Applicant: HEESUNG MATERIAL LTD.
    Inventors: Mi-Jin KIM, Won-Jang JEONG, Jin-Seok CHOI
  • Naphthalenyloxypropenyl derivatives having inhibitory activity against histone deacetylase and pharmaceutical composition comprising the same
    Patent number: 8053435
    Abstract: The present invention discloses novel naphthalenyloxypropenyl derivatives useful for inhibiting the enzyme activity of histone deacetylase, leading effective suppression of cancer cell proliferation.
    Type: Grant
    Filed: November 1, 2007
    Date of Patent: November 8, 2011
    Assignees: Korea Research Institute of Chemical Technology, Crystalgenomics, Inc.
    Inventors: Cheol Hae Lee, Hee Jung Jung, Jae Hak Kim, Won Jang Jeong, Joong Myung Cho, Seong Gu Ro, Young Lan Hyun, Cheol Soon Lee, Dongkyu Shin
  • NAPHTHALENYLOXYPROPENYL DERIVATIVES HAVING INHIBITORY ACTIVITY AGAINST HISTONE DEACETYLASE AND PHARMACEUTICAL COMPOSITION COMPRISING THE SAME
    Publication number: 20100069630
    Abstract: The present invention discloses novel naphthalenyloxypropenyl derivatives useful for inhibiting the enzyme activity of histone deacetylase, leading effective suppression of cancer cell proliferation.
    Type: Application
    Filed: November 1, 2007
    Publication date: March 18, 2010
    Applicants: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY, CRYSTALGENOMICS, INC
    Inventors: Cheol Hae Lee, Hee Jung Jung, Jae Hak Kim, Won Jang Jeong, Joong Myung Cho, Seong Gu Ro, Young Lan Hyun, Cheol Soon Lee
  • Intermediate of carbapenem antibiotics and process for the preparation thereof
    Patent number: 6858727
    Abstract: There is disclosed an azetidinone compound of the formula (I): wherein R is hydrogen, or a hydroxy protecting group, R1 and R2 are each independently alkyl of 1-15 carbon atoms, benzyl or cyclized together with the carbon atom to which they are attached to form a 5 or 6-membered cyclic hydrocarbon or a heterocyclic radical having one or two hetero ring atoms, said hetero ring atoms being selected from the group consisting of O and S; R3 is lower alkyl or —COO(lower alkyl) R4 is phenyl, or phenyl substituted with halogen, lower alkoxy or nitro which is useful as a synthetic intermediate to the 1??-methylcarbapenem-type antibacterial agent.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: February 22, 2005
    Assignees: Dong Wha Pharm, Ind. Co., Ltd., Korea Research Institute of Chemical Technology
    Inventors: Cheol-hae Lee, Bong-jin Kim, Do-kyu Pyun, Won-jang Jeong, Jae-hak Kim, Hee-jung Chung, Hyun-jung Kwak, Eun-jung Kim, Shin-seup Song, Yong-ho Chung
  • Intermediate of carbapenem antibiotics and process for the preparation thereof
    Publication number: 20030191106
    Abstract: There is disclosed an azetidinones compound of the formula (I): Wherein, R is hydrogen, or hydroxy protecting group, R1 and R2 are each independently alkyl of 1-15 carbon atoms, benzyl or cycloalkyl of 5-6 carbon atom which may have substituent(s), R3 is low alkyl, or low alkyl ester, R4 is aryl, or aryl substituted with halogen, alkoxy of 1-6 carbon atom, nitro groups which is useful as a synthetic intermediate of the 1′&bgr;-methylcarbapenem-type antibacterial agent.
    Type: Application
    Filed: February 10, 2003
    Publication date: October 9, 2003
    Inventors: Cheol-hae Lee, Bong-jin Kim, Do-kyu Pyun, Won-jang Jeong, Jae-hak Kim, Hyung-jung Chung, Hyung-Jung Kwak, Eun-jung Kim, Shin-seup Song, Yong-Ho Chung