Patents by Inventor Cheol Jun SONG

Cheol Jun SONG 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).

  • POLYCARBONATE AND METHOD FOR PREPARING SAME
    Publication number: 20240132662
    Abstract: The present application relates to a polycarbonate including a unit represented by Chemical Formula 1, a composition including the same and a molded article prepared from the composition.
    Type: Application
    Filed: January 7, 2022
    Publication date: April 25, 2024
    Inventors: Hanbit Jang, Seoyoung Im, Hoyong Lee, Cheol Jun Song
  • POLYCARBONATE AND METHOD FOR PREPARING SAME
    Publication number: 20240117114
    Abstract: The present application relates to a polycarbonate including units represented by Chemical Formula 1a or 1b and Chemical Formula 1c, a composition including the same, and a molded article prepared from the composition.
    Type: Application
    Filed: January 12, 2022
    Publication date: April 11, 2024
    Inventors: Seoyoung Im, Hanbit Jang, Hoyong Lee, Cheol Jun Song
  • POLYCARBONATE, AND METHOD FOR PREPARING SAME
    Publication number: 20240101758
    Abstract: The present application relates to a polycarbonate including a unit represented by Chemical Formula 1a; and a unit represented by Chemical Formula 1b, a composition including the same and a molded article prepared from the composition.
    Type: Application
    Filed: January 7, 2022
    Publication date: March 28, 2024
    Inventors: Jaemyeng Jeong, Hoyong Lee, Cheol Jun Song, Bethy Kim, Seoyoung Im, Hanbit Jang
  • Diamine compound, and polyimide precursor and polyimide film using same
    Patent number: 11926706
    Abstract: Disclosed is a novel diamine compound in which an imide ring is directly bonded to a (hetero)aryl ring in a molecule, and a polyimide film prepared by polymerizing the novel diamine compound exhibits improved thermal properties and storage stability.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: March 12, 2024
    Assignee: LG CHEM, LTD.
    Inventors: Minju Kim, Jinyoung Park, Hoyong Lee, Cheol Jun Song
  • POLYCARBONATE AND METHOD FOR PREPARING SAME
    Publication number: 20230340195
    Abstract: The present disclosure relates to polycarbonate a diol compound represented by Chemical Formula 1; at least one compound of compounds represented by Chemical Formulae 2 and 3; and a carbonate precursor-derived repeating unit, and a method for preparing the same.
    Type: Application
    Filed: October 15, 2021
    Publication date: October 26, 2023
    Inventors: Byunghee Hwang, Bethy Kim, Seoyoung Im, Hoyong Lee, Cheol Jun Song
  • POLYCARBONATE COMPOSITION AND MOLDED ARTICLES THEREOF
    Publication number: 20230212390
    Abstract: The present disclosure relates to a polycarbonate composition. The polycarbonate composition is a composition in which polyalkylene glycol end-capped with a specific compound is blended in polycarbonate together with two specific antioxidants in a predetermined amount, and can provide a molded article which has high light transmittance, is transparent and particularly has excellent long-term color stability.
    Type: Application
    Filed: October 21, 2021
    Publication date: July 6, 2023
    Inventors: Hyong Min BAHN, Un KO, Cheol Jun SONG, Jeeseon KIM, Jaemyeng JEONG, Hanbit JANG, Sugil YUM, Mooho HONG, Jungmoon BAE
  • Nitrogen-containing compound, color conversion film comprising same, and backlight unit and display device each comprising same
    Patent number: 11498931
    Abstract: The present specification relates to a nitrogen-containing compound, and a color conversion film, a backlight unit and a display apparatus including the same.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: November 15, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Seonkyoung Son, Milim Lee, Hoyong Lee, Cheol Jun Song, Jeeseon Kim, Hyungwook Yu
  • Nitrogen-containing cyclic compound and color conversion film comprising same
    Patent number: 11479549
    Abstract: The present specification relates to a compound containing nitrogen, and a color conversion film, a backlight unit, and a display device, including the same.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: October 25, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Milim Lee, Seonkyoung Son, Cheol Jun Song, Minju Kim, Hoyong Lee
  • DIAMINE COMPOUND, AND POLYIMIDE PRECURSOR AND POLYIMIDE FILM USING SAME
    Publication number: 20220041809
    Abstract: Disclosed is a novel diamine compound in which an imide ring is directly bonded to a (hetero)aryl ring in a molecule, and a polyimide film prepared by polymerizing the novel diamine compound exhibits improved thermal properties and storage stability.
    Type: Application
    Filed: January 22, 2020
    Publication date: February 10, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Minju KIM, Jinyoung PARK, Hoyong LEE, Cheol Jun SONG
  • DIAMINE COMPOUND, AND POLYIMIDE PRECURSOR AND POLYIMIDE FILM USING SAME
    Publication number: 20220017461
    Abstract: Disclosed is a novel diamine compound comprising a structure in which diphenyl sulfide in a molecule is bonded through an amide bond to a phenyl ring substituted with an amine group. A polyimide film prepared by polymerizing the novel diamine compound exhibits improved mechanical and thermal properties and an enhanced refractive index.
    Type: Application
    Filed: February 14, 2020
    Publication date: January 20, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Jeeseon KIM, Kyunghwan KIM, Hoyong LEE, Cheol Jun SONG
  • POLYIMIDE PRECURSOR COMPOSITION AND POLYIMIDE FILM, SUBSTRATE FOR DISPLAY DEVICE, AND OPTICAL DEVICE PREPARED BY USING SAME
    Publication number: 20210238351
    Abstract: The present disclosure provides a polyimide film having improved heat resistance and refractive index by using a polyimide precursor composition comprising a diamine of Chemical Formula 1 and an acid dianhydride of Chemical Formula 2 as polymerization components, thereby reducing the difference in refractive index from the upper layer to improve bottom emission efficiency.
    Type: Application
    Filed: January 28, 2020
    Publication date: August 5, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jiyeon SUNG, Hoyong LEE, Cheol Jun SONG, Kyunghwan KIM, Mi Eun KANG
  • NITROGEN-CONTAINING COMPOUND, COLOR CONVERSION FILM COMPRISING SAME, AND BACKLIGHT UNIT AND DISPLAY DEVICE EACH COMPRISING SAME
    Publication number: 20210107925
    Abstract: The present specification relates to a nitrogen-containing compound, and a color conversion film, a backlight unit and a display apparatus including the same.
    Type: Application
    Filed: December 7, 2018
    Publication date: April 15, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Seonkyoung SON, Milim LEE, Hoyong LEE, Cheol Jun SONG, Jeeseon KIM, Hyungwook YU
  • Nitrogenous compound and color conversion film comprising same
    Patent number: 10961260
    Abstract: The present specification relates to a compound containing nitrogen, and a color conversion film, a backlight unit, and a display device, including the same.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: March 30, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Seonkyoung Son, Cheol Jun Song, Milim Lee, Hoyong Lee
  • Nitrogen-containing cyclic compound and color conversion film comprising same
    Patent number: 10954227
    Abstract: The present specification relates to a compound containing nitrogen, and a color conversion film, a backlight unit, and a display device, including the same.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: March 23, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Seonkyoung Son, Milim Lee, Cheol Jun Song, Minju Kim, Hoyong Lee
  • COMPOUND AND COLOR CONVERSION FILM COMPRISING SAME
    Publication number: 20210002294
    Abstract: The present specification relates to a compound represented by Formula 1, and a color conversion film, a backlight unit, and a display device each including the compound.
    Type: Application
    Filed: November 8, 2019
    Publication date: January 7, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Seonkyoung SON, Seongmi CHO, Hoyong LEE, Cheol Jun SONG
  • NITROGEN-CONTAINING CYCLIC COMPOUND AND COLOR CONVERSION FILM COMPRISING SAME
    Publication number: 20200407352
    Abstract: The present specification relates to a compound containing nitrogen, and a color conversion film, a backlight unit, and a display device, including the same.
    Type: Application
    Filed: April 22, 2019
    Publication date: December 31, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Milim LEE, Seonkyoung SON, Cheol Jun SONG, Minju KIM, Hoyong LEE
  • Nitrogenous cyclic compound and color changing film comprising same
    Patent number: 10858375
    Abstract: The present specification relates to a compound containing nitrogen, and a color conversion film, a backlight unit, and a display device, including the same.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: December 8, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Milim Lee, Seonkyoung Son, Cheol Jun Song, Sang Pil Moon, Hoyong Lee
  • NITROGENOUS COMPOUND AND COLOR CONVERSION FILM COMPRISING SAME
    Publication number: 20200331932
    Abstract: The present specification relates to a compound containing nitrogen, and a color conversion film, a backlight unit, and a display device, including the same.
    Type: Application
    Filed: November 14, 2017
    Publication date: October 22, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Seonkyoung SON, Cheol Jun SONG, Milim LEE, Hoyong LEE
  • NITROGEN-CONTAINING CYCLIC COMPOUND AND COLOR CONVERSION FILM COMPRISING SAME
    Publication number: 20200299290
    Abstract: The present specification relates to a compound containing nitrogen, and a color conversion film, a backlight unit, and a display device, including the same.
    Type: Application
    Filed: April 22, 2019
    Publication date: September 24, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Seonkyoung SON, Milim LEE, Cheol Jun SONG, Minju KIM, Hoyong LEE
  • Nitrogen-containing compound and color conversion film comprising same
    Patent number: 10766910
    Abstract: The present specification relates to a compound containing nitrogen, and a color conversion film, a backlight unit, and a display device, including the same.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: September 8, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Milim Lee, Seonkyoung Son, Cheol Jun Song, Hoyong Lee