Patents by Inventor Jin-Seok Choi

Jin-Seok 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).

  • Patent number: 11891361
    Abstract: The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: February 6, 2024
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Hyun-Ju La, Seong-Jong Park, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee
  • Patent number: 11794971
    Abstract: A laminated film for an eco-friendly packaging material, according to one embodiment, comprises: a paper layer for blocking oxygen and moisture; and a film layer that can be biodegraded or biologically disintegrated by means of at least one from among microorganisms, moisture, oxygen, light and heat, wherein the oxygen transmission rate of the laminated film can be 0.01-1 cc/m2 per day, and the moisture transmission rate thereof can be 0.01-1 cc/m2 per day.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: October 24, 2023
    Assignee: DONGWON SYSTEMS CORPORATION
    Inventors: Ki Ho Park, Jin Seok Choi, Ji Hun Kim
  • Patent number: 11678576
    Abstract: The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: June 13, 2023
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Yun-Ji Lee, Han-Kook Oh, Hye-Su Ji, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi
  • Patent number: 11665961
    Abstract: The present specification relates to a hetero-cyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: May 30, 2023
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Hyun-Ju La, Yu-Jin Heo, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee
  • Patent number: 11563185
    Abstract: The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: January 24, 2023
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Nam-Jin Lee, Min-Ji Park, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee
  • Patent number: 11552255
    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: Grant
    Filed: November 30, 2017
    Date of Patent: January 10, 2023
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Hyun-Ju La, Yu-Jin Heo, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee
  • Patent number: 11476425
    Abstract: The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: October 18, 2022
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Han-Kook Oh, Yun-Ji Lee, Hye-Su Ji, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi
  • Patent number: 11434228
    Abstract: The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: September 6, 2022
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Gi-Back Lee, Seong-Jong Park, Ji-Young Kim, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee
  • Patent number: 11427562
    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: Grant
    Filed: July 6, 2017
    Date of Patent: August 30, 2022
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Han-Kook Oh, Jun-Tae Mo, Yong-Geun Jung, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee
  • Patent number: 11420299
    Abstract: Disclosed is an automatic bolt fastening device which includes a main body frame, a lower arm installed in the main body frame to be rotatable in a rightward-leftward direction, a gripper installed in a tip portion of the lower arm to pick up the bolt from a bolt feeder, an upper arm installed in the main body frame on an upper side of the lower arm to be rotatable in the rightward-leftward direction, and a bolt fastener installed in a tip portion of the upper arm to be movable upward and downward, and fastening the bolt to the workpiece located on the assembly line after being moved to the assembly line by the upper arm in a state where the bolt fastener vacuum-suctions the bolt picked up by the gripper.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: August 23, 2022
    Assignee: J-rem Co., Ltd.
    Inventors: Jin Seok Choi, Kwang Geun Choi
  • Patent number: 11362282
    Abstract: The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: June 14, 2022
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Hye-Su Ji, Han-Kook Oh, Yun-Ji Lee, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi
  • Publication number: 20220161980
    Abstract: A laminated film for an eco-friendly packaging material, according to one embodiment, comprises: a paper layer for blocking oxygen and moisture; and a film layer that can be biodegraded or biologically disintegrated by means of at least one from among microorganisms, moisture, oxygen, light and heat, wherein the oxygen transmission rate of the laminated film can be 0.01-1 cc/m2 per day, and the moisture transmission rate thereof can be 0.01-1 cc/m2 per day.
    Type: Application
    Filed: April 7, 2020
    Publication date: May 26, 2022
    Applicant: DONGWON SYSTEMS CORPORATION
    Inventors: Ki Ho Park, Jin Seok Choi, Ji Hun Kim
  • Patent number: 11302873
    Abstract: The present application provides a hetero-cyclic compound capable of greatly enhancing a lifetime, 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: Grant
    Filed: December 19, 2017
    Date of Patent: April 12, 2022
    Assignee: LT MATERIALS CO, LTD.
    Inventors: Hyun Ju La, Yun Ji Lee, Gi Back Lee, Won Jang Jeong, Jin Seok Choi, Dae Hyuk Choi
  • Patent number: 11279538
    Abstract: The example embodiments relate to a lid packing material for food container, and a lid packing material for food container according to an aspect of the example embodiments includes: a substrate layer; and a heat-adhesion layer formed on the substrate layer, wherein the heat-adhesion layer includes at least two types of wax having different melting points.
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: March 22, 2022
    Assignee: DONGWON SYSTEMS CORPORATION
    Inventors: Jin Seok Choi, Sung Ji Choi
  • Publication number: 20220063030
    Abstract: Disclosed is an automatic bolt fastening device which includes a main body frame, a lower arm installed in the main body frame to be rotatable in a rightward-leftward direction, a gripper installed in a tip portion of the lower arm to pick up the bolt from a bolt feeder, an upper arm installed in the main body frame on an upper side of the lower arm to be rotatable in the rightward-leftward direction, and a bolt fastener installed in a tip portion of the upper arm to be movable upward and downward, and fastening the bolt to the workpiece located on the assembly line after being moved to the assembly line by the upper arm in a state where the bolt fastener vacuum-suctions the bolt picked up by the gripper.
    Type: Application
    Filed: February 11, 2021
    Publication date: March 3, 2022
    Applicant: J-rem Co., Ltd.
    Inventors: Jin Seok CHOI, Kwang Geun CHOI
  • Patent number: 11248008
    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: Grant
    Filed: November 24, 2017
    Date of Patent: February 15, 2022
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Won-Jang Jeong, Yun-Ji Lee, Gi-Back Lee, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee
  • Patent number: 11239427
    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: Grant
    Filed: July 6, 2017
    Date of Patent: February 1, 2022
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Gi-Back Lee, Han-Kook Oh, Yong-Geun Jung, Jun-Tae Mo, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee
  • Publication number: 20210323286
    Abstract: Disclosed is an eco-friendly packaging. The eco-friendly packaging with an accommodation space is formed by bonding multilayer films, and the multilayer films each include a first layer including a base layer including oriented polypropylene, and a coating layer applied to the outer surface of the base layer by coating, and a second layer laminated on the inner surface of the base layer, the second layer including cast polypropylene.
    Type: Application
    Filed: March 4, 2021
    Publication date: October 21, 2021
    Applicant: DONGWON SYSTEMS CORPORATION
    Inventors: Sung Ji Choi, Jin Seok Choi, Do Yeon Kim
  • Publication number: 20210316538
    Abstract: Disclosed are an eco-friendly container label and a method of manufacturing an eco-friendly container. The eco-friendly container label to be attached to a disposable container includes a first layer including a print layer, and a barrier layer stacked on one side of the print layer, a second layer including an adhesive layer formed of the same material as the print layer, the adhesive layer to be stacked on the surface of the disposable container, and an intermediate base layer stacked between the first layer and the second layer and configured to bond the adhesive layer and the print layer.
    Type: Application
    Filed: March 4, 2021
    Publication date: October 14, 2021
    Applicant: DONGWON SYSTEMS CORPORATION
    Inventors: Sung Ji Choi, Jin Seok Choi
  • Patent number: 11133477
    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: Grant
    Filed: July 11, 2017
    Date of Patent: September 28, 2021
    Assignee: LT MATERIALS CO., LTD.
    Inventors: Yun-Ji Lee, Jun-Tae Mo, Yong-Geun Jung, Won-Jang Jeong, Jin-Seok Choi, Dae-Hyuk Choi, Joo-Dong Lee