Patents by Inventor Eun Ji Shin

Eun Ji Shin 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: 20250136742
    Abstract: A multi-block copolymer and a method for preparing the same which are capable of providing a resin composition with excellent compatibility and high impact strength due to a chain structure close to symmetry are described herein.
    Type: Application
    Filed: September 30, 2022
    Publication date: May 1, 2025
    Applicant: LG Chem, Ltd.
    Inventors: Hyun Mo Lee, Seul Ki Im, Dae Woong Lee, Ji Hyun Park, Yun Kon Kim, Eun Ji Shin, Seok Pil Sa
  • Publication number: 20250100953
    Abstract: Provided are a ligand compound of Formula 1 having a novel structure, which shows high catalyst activity and high selectivity to 1-hexene and 1-octene, and may perform ethylene oligomerization with excellent efficiency, an organochromium compound, a catalyst composition comprising the organochromium compound and a method for oligomerizing ethylene using the same, wherein all the variables are as described herein.
    Type: Application
    Filed: March 3, 2023
    Publication date: March 27, 2025
    Applicant: LG Chem, Ltd.
    Inventors: Seok Sun Kim, Seok Pil Sa, Tae Hee Kim, Seung Hwan Jung, Eun Ji Shin, Yeon Ho Cho, Won Taeck Lim, Hee Jeong KIm
  • Publication number: 20250027049
    Abstract: The present invention relates to an islet-like organoid in which insulin secretion can be optically regulated by differentiating, into pancreatic islets, human pluripotent stem cells (monSTIM1-hPSC) obtained by knocking-in monSTIM1, which is an inducer of Ca2+ concentration increase (Ca2+ transient), into the AAVS1 locus of the stem cells. Since it has been confirmed in vitro and in the body of a diabetic mouse model that the islet-like organoid of the present invention can secrete insulin through an intracellular calcium influx increased by light irradiation, the islet-like organoid can be effectively used in the treatment of diabetic patients.
    Type: Application
    Filed: November 29, 2022
    Publication date: January 23, 2025
    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Yong Mahn Han, Wondo Heo, Ji Eun Choi, Jinsu Lee, Eun Ji Shin
  • Patent number: 12187823
    Abstract: A ligand compound having a novel structure, a transition metal compound including the same, a catalyst composition including the transition metal compound, and a method of preparing an olefin polymer using the catalyst composition are disclosed herein. In some embodiments, the transition metal compound is represented by Formula 1. In some embodiments, the ligand compound is represented by Formula 2.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: January 7, 2025
    Assignee: LG Chem, Ltd.
    Inventors: Seul Ki Im, Eun Ji Shin, Seok Pil Sa, Ki Soo Lee, Bun Yeoul Lee, Jun Won Baek, Hyun Ju Lee
  • Publication number: 20250000912
    Abstract: Hypoimmunogenic stem cells and hypoimmunogenic cells differentiated or derived from stem cells are disclosed. The hypoimmunogenic stem cells and the hypoimmunogenic cells differentiated or derived therefrom are capable of inhibiting immune rejection upon transplantation by increasing the expression or activity level of immune activity inhibitory factors. A method of preparing the same and a cell therapeutic agent using the same are also disclosed.
    Type: Application
    Filed: August 30, 2024
    Publication date: January 2, 2025
    Inventors: Jae Young LEE, Kang In LEE, Young Ju SON, Nan Yeong GO, Eun Ji SHIN, Hwan Yeul YU
  • Publication number: 20240360266
    Abstract: A multi-block copolymer including a polystyrene-based block and a polyolefin-based block, and having a high molecular weight and a low content of homo-polystyrene, and a method for producing the multi-block copolymer are described herein.
    Type: Application
    Filed: September 30, 2022
    Publication date: October 31, 2024
    Applicant: LG CHEM, LTD.
    Inventors: Seul Ki Im, Hyun Mo Lee, Ji Hyun Park, Eun Ji Shin, Yun Kon Kim, Seok PII Sa
  • Publication number: 20240360265
    Abstract: A multiblock copolymer, a method for preparing same, and a thermoplastic resin composition comprising polypropylene and the multiblock copolymer are described herein. The block copolymer has excellent processability and excellent compatibility with polypropylene, and the thermoplastic resin composition of the present disclosure using the same shows excellent low temperature impact strength and may be usefully used as a thermoplastic resin composition for the manufacture of a product requiring high impact resistance such as automotive parts.
    Type: Application
    Filed: September 30, 2022
    Publication date: October 31, 2024
    Applicant: LG Chem, Ltd.
    Inventors: Ji Hyun Park, Jung Won Park, Chang Jong Kim, Eun Ji Shin, Seok Pil Sa, Seul Ki Im, Hyun Mo Lee, Yun Kon Kim
  • Publication number: 20240352176
    Abstract: A multiblock copolymer having a structure in which polystyrene chains are attached to both terminals of a polyolefin chain, a resin composition comprising same, and methods for preparing them are described herein.
    Type: Application
    Filed: September 30, 2022
    Publication date: October 24, 2024
    Applicant: LG Chem, Ltd.
    Inventors: Sol Cho, Ji Hyun Park, Seul Ki Im, Hyun Mo Lee, Yun Kon Kim, Eun Ji Shin, Seok Pil Sa
  • Patent number: 12122905
    Abstract: A polyolefin-polystyrene multi-block copolymer and a method of producing the same is disclosed herein. In some embodiments, the polyolefin-polystyrene multi-block copolymer has a first complex viscosity of 40,000 Pa·s to 350,000 Pa·s at a temperature of 160° C. and a first frequency of 0.5 rad/s, and has a second complex viscosity of 900 Pa·s to 3,500 Pa·s at a temperature of 160° C. and a second frequency of 125 rad/s. The polyolefin-polystyrene multi-block copolymer has a structure in which polystyrene chains are attached to both ends of a polyolefin chain.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: October 22, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Hyun Mo Lee, Seok Pil Sa, Seul Ki Im, Ji Hyun Park, Yun Kon Kim, Ki Soo Lee, Eun Ji Shin
  • Patent number: 12116445
    Abstract: A polyolefin-polystyrene multi-block copolymer and method of making the same is disclosed herein. In some embodiments, a polyolefin-polystyrene multi-block copolymer having a ratio of a loss modulus (E?) to a storage modulus (E?) satisfying the following conditions (a) and (b) over a temperature range of ?80° C. to 40° C., wherein the ratio is represented by a loss tangent (tan ?) value and is obtained by dynamic mechanical analysis (DMA), (a) a maximum of the tan ? value in a peak present in the temperature range is 0.20 to 0.35, and (b) a half-width of the peak ranges from 32.0° C. to 50.0° C. The polyolefin-polystyrene multi-block copolymer has a structure in which polystyrene chains are attached to both ends of a polyolefin chain.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: October 15, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Ji Hyun Park, Dae Woong Lee, Sung Hyun Park, Seok Pil Sa, Seul Ki Im, Hyun Mo Lee, Yun Kon Kim, Ki Soo Lee, Myung Han Lee, Eun Ji Shin
  • Publication number: 20240287223
    Abstract: A ligand compound represented by the following Formula 1, which shows high catalyst activity and high selectivity to 1-hexene and 1-octene, and may perform ethylene oligomerization with excellent efficiency, an organochromium compound, a catalyst composition comprising the organochromium compound and a method for oligomerizing ethylene using the same, are described: wherein all the variables are described herein.
    Type: Application
    Filed: March 3, 2023
    Publication date: August 29, 2024
    Applicant: LG Chem, Ltd.
    Inventors: Seok Pil Sa, Seok Sun Kim, Tae Hee Kim, Seung Hwan Jung, Eun Ji Shin, Yeon Ho Cho, Won Taeck Lim, Hee Jeong Kim
  • Publication number: 20240182693
    Abstract: Provided is a thermoplastic resin composition comprising polypropylene and a multi-block copolymer. The thermoplastic resin composition including the polypropylene and the multi-block copolymer exhibits excellent scratch resistance, and thus may be usefully used as a resin composition in the manufacturing of products requiring scratch resistance, such as automotive interior materials.
    Type: Application
    Filed: September 30, 2022
    Publication date: June 6, 2024
    Applicant: LG Chem, Ltd.
    Inventors: Yun Kon Kim, Eun Ji Shin, Seok Pil Sa, Seul Ki Im, Hyun Mo Lee, Ji Hyun Park
  • Publication number: 20240166999
    Abstract: Mesenchymal stem cells, a preparation method therefor, and a cell therapeutic agent using same have hemocompatibility since thrombosis thereof is suppressed after the expression or activation level of blood coagulation initiating factor CD142 is reduced or inhibited. When intravascularly administered, the mesenchymal stem cells have improved hemocompatibility since thrombosis thereof, which can be caused by the administered mesenchymal stem cells, is suppressed.
    Type: Application
    Filed: January 29, 2024
    Publication date: May 23, 2024
    Inventors: Eun Ji SHIN, Kang In LEE, Yu Ri CHOI, Hye Jung SHIN, Jae Young LEE, Hwan Yeul YU
  • Publication number: 20240139254
    Abstract: Provided are mesenchymal stem cells, a preparation method therefor, and a use thereof, the mesenchymal stem cell having oxidative stress resistance by reducing or inhibiting the expression or activity level of KEAP1, which is a negative regulator of Nrf2, so as to increase the activity of Nrf2.
    Type: Application
    Filed: January 9, 2024
    Publication date: May 2, 2024
    Inventors: Eun Ji SHIN, Kang In LEE, Yu Ri CHOI, Hye Jung SHIN, Jae Young LEE
  • Publication number: 20230340243
    Abstract: The present invention relates to a thermoplastic resin composition including a polyolefin-polystyrene-based multiblock copolymer having a structure in which a polystyrene chain is attached to both ends of a polypropylene and polyolefin chain, and the thermoplastic resin composition according to the present invention has excellent elongation and tensile strength as well as high fluidity properties, and thus, may exhibit excellent molding processability.
    Type: Application
    Filed: July 30, 2021
    Publication date: October 26, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Hyun Mo Lee, Seul Ki Im, Ji Hyun Park, Yun Kon Kim, Seung Jung Yu, Seok Pil Sa, Ki Soo Lee, Eun Ji Shin
  • Patent number: 11795321
    Abstract: A method for producing a block copolymer composition including a diblock copolymer and a triblock copolymer each containing a polyolefin-based block and a polystyrene-based block is disclosed herein. In some embodiments, the method includes reacting an organic zinc compound with one or more kinds of olefin-based monomers in the presence of a transition metal catalyst to form an intermediate having an olefin-based polymer block, reacting the intermediate styrene-based monomer in the presence of an alkyllithium compound to form a product having a styrene-based polymer block, and reacting the product with water, oxygen, or an organic acid to form a block copolymer wherein the number of moles of the alkyllithium compound used to form the product is larger than the number of moles of the organic zinc compound used to form the intermediate.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: October 24, 2023
    Inventors: Seok Pil Sa, Eun Ji Shin, Yoon Ki Hong, Hyun Mo Lee, Ki Soo Lee, Bun Yeoul Lee
  • Publication number: 20230331753
    Abstract: The present invention relates to a ligand compound represented by the following Formula 1, an organochromium compound, a catalyst system including the organochromium compound and a method for oligomerizing ethylene using the same: wherein Cy, and R1 to R4 are described herein.
    Type: Application
    Filed: September 15, 2021
    Publication date: October 19, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Seok Sun Kim, Tae Hee Kim, Seok Pil Sa, Se Young Kim, Eun Ji Shin
  • Publication number: 20230303753
    Abstract: The present invention relates to a method for preparing a polyolefin-polystyrene-based multiblock copolymer having a uniform structure and showing excellent physical properties through continuous type coordination polymerization and batch type anionic polymerization.
    Type: Application
    Filed: August 25, 2021
    Publication date: September 28, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Yun Kon Kim, Seul Ki Im, Hyun Mo Lee, Ji Hyun Park, Dong Min Kim, Mi Kyung Kim, Ki Soo Lee, Eun Ji Shin, Seok Pil Sa, Seung Jung Yu
  • Publication number: 20230295189
    Abstract: The present invention relates to a chain transfer agent including an organozinc compound, a preparation method thereof, and a method for preparing a block copolymer using the same. A chain transfer agent prepared by a preparation method including preparing a Grignard reagent containing styrene residues, and reacting the prepared Grignard reagent with alkyl zinc alkoxide, which is a zinc compound, has not catalyst poison and by-products, and contains 96 wt % or more of a target compound. A block copolymer polymerized using the chain transfer agent and a resin composition including the block copolymer have excellent mechanical properties.
    Type: Application
    Filed: July 30, 2021
    Publication date: September 21, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Seok Pil Sa, Eun Ji Shin, Ki Soo Lee, Bun Yeoul Lee, Jong Chul Lee
  • Publication number: 20230287207
    Abstract: The present invention relates to a thermoplastic resin composition including a polyolefin-polystyrene-based multi-block copolymer having a structure in which a polystyrene chain is attached to both ends of a polypropylene and polyolefin chain, and the thermoplastic resin composition according to the present invention has significantly improved low-temperature and room temperature impact strength properties as well as high fluidity properties, and thus, may exhibit excellent molding processability.
    Type: Application
    Filed: July 30, 2021
    Publication date: September 14, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Ji Hyun Park, Seul Ki Im, Hyun Mo Lee, Yun Kon Kim, Seung Jung Yu, Seok Pil Sa, Ki Soo Lee, Eun Ji Shin