Patents by Inventor Jisu Jeong

Jisu 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).

  • Patent number: 12236178
    Abstract: A method of generating a circuit model used to simulate an integrated circuit may include generating first feature element data and second feature element data by classifying feature data of a target semiconductor device according to measurement conditions, generating first target data and second target data by preprocessing the first feature element data and the second feature element data, respectively, generating a first machine learning model using the first target data and extracting a second machine learning model using the second target data, and generating the circuit model used to simulate the integrated circuit using the first machine learning model and the second machine learning model.
    Type: Grant
    Filed: October 18, 2021
    Date of Patent: February 25, 2025
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yohan Kim, Changwook Jeong, Jisu Ryu
  • Publication number: 20250035698
    Abstract: An apparatus for testing electronic devices comprises: a base platform; a cover plate disposed on the base platform, and defining with the base platform an array of test chambers and at least one gap separating the test chambers from each other, wherein the cover plate has at each of the test chambers a top opening for placing an electronic device within the test chamber and a side wall around the opening; an array of test boards each being disposed under one of the array of test chambers, wherein each test board includes a socket connectable with the electronic device placed within the test chamber for testing; and an electromagnetic absorber material disposed within the at least one gap and attached onto the cover plate to absorb electromagnetic interferences between adjacent electronic devices when they are placed within the array of test chambers for testing.
    Type: Application
    Filed: July 23, 2024
    Publication date: January 30, 2025
    Inventors: SeungHyeon JEONG, HunTaek LEE, BumSoo PARK, JiSu LEE
  • Publication number: 20250001390
    Abstract: Provided are a carbon dioxide absorbent including an ionic liquid including a choline-based cation and a phenolate-based anion, and an aliphatic alcohol, and a method of separating carbon dioxide using the same. Since the carbon dioxide absorbent of the present disclosure is thermally and chemically stable, it may decrease by-products released into the atmosphere and thus, is environmentally friendly. The method of separating carbon dioxide using the absorbent is an economical method which allows energy saving with low renewable energy.
    Type: Application
    Filed: January 10, 2023
    Publication date: January 2, 2025
    Inventors: Lim Ok Pyun, Ilgu Jung, Byul Ha Na Min, Junga Lee, Jisu Jeong
  • Publication number: 20230405555
    Abstract: Provided is a carbon dioxide absorbent including an ionic liquid including an imidazole-based anion and an aliphatic alcohol. Since an alcohol solvent included in the carbon dioxide absorbent according to one embodiment has low toxicity and a very high boiling point, the carbon dioxide absorbent has no problem of release into the atmosphere and consequent environmental pollution, and is chemically stable to significantly lower the possibility of release of decomposition products into the atmosphere. In addition, the carbon dioxide absorbent is also effective, since it may absorb carbon dioxide with a higher equivalent than an absorbent input equivalent, and has low regeneration energy so that carbon dioxide is easily desorbed.
    Type: Application
    Filed: June 17, 2022
    Publication date: December 21, 2023
    Inventors: Ilgu Jung, Lim Ok Pyun, Byul Ha Na Min, Junga Lee, Jisu Jeong
  • Patent number: 9771453
    Abstract: Provided are a complex prepared from ammonium salt-containing ligands and having such an equilibrium structural formula that the metal center takes a negative charge of 2 or higher, and a method for preparing polycarbonate via copolymerization of an epoxide compound and carbon dioxide using the complex as a catalyst. When the complex is used as a catalyst for copolymerizing an epoxide compound and carbon dioxide, it shows high activity and high selectivity and provides high-molecular weight polycarbonate, and thus easily applicable to commercial processes. In addition, after forming polycarbonate via carbon dioxide/epoxide copolymerization using the complex as a catalyst, the catalyst may be separately recovered from the copolymer.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: September 26, 2017
    Assignee: SK Innovation Co., Ltd.
    Inventors: Myungahn Ok, Jisu Jeong, BunYeoul Lee, Sujith S., Anish Cyriac, JaeKi Min, JongEon Seong
  • Patent number: 9481762
    Abstract: The present invention relates to a method of manufacturing a polycarbonate including the process of copolymerizing epoxide compound and CO2 using cobalt(III) or chromium(III), where the ligands contains at least 3 ammonium cations, central metal has formal ?1 charge, and conjugated anions of the two cationic ammonium groups are acid-base homoconjugation, as catalyst. According to the present invention, the initial induction time can be reduced when the polycarbonate is manufactured and it is possible to improve the activity of the catalyst and the molecular weight of the obtained polymer.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: November 1, 2016
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jisu Jeong, Sujith Sudevan, Myung Ahn Ok, Jieun Yoo, BunYeoul Lee, Sung-Jae Na
  • Patent number: 9371420
    Abstract: There is provided a method for preparing a low-molecular weight poly(alkylene carbonate) of which the molecular weight and chain shape are precisely controlled, by introducing a phosphorous compound having a hydroxyl group as a chain transfer agent in order to regulate the molecular weight, in alternating copolymerizing an epoxide compound and carbon dioxide by using trivalent metal complex prepared from a Salen type ligand containing a quaternary ammonium salt, and a polymer prepared by the method. Since poly(alkylene carbonate) prepared according to the present invention includes a phosphate or phosphonate group in the polymer chain, it has flame-retarding property.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: June 21, 2016
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jisu Jeong, SungJae Na, Sujith Sudevan, MyungAhn Ok, YongGyu Han, KwangJin Chung, BunYeoul Lee, Anish Cyriac, SangHwan Lee
  • Publication number: 20160075824
    Abstract: Provided are a complex prepared from ammonium salt-containing ligands and having such an equilibrium structural formula that the metal center takes a negative charge of 2 or higher, and a method for preparing polycarbonate via copolymerization of an epoxide compound and carbon dioxide using the complex as a catalyst. When the complex is used as a catalyst for copolymerizing an epoxide compound and carbon dioxide, it shows high activity and high selectivity and provides high-molecular weight polycarbonate, and thus easily applicable to commercial processes. In addition, after forming polycarbonate via carbon dioxide/epoxide copolymerization using the complex as a catalyst, the catalyst may be separately recovered from the copolymer.
    Type: Application
    Filed: November 16, 2015
    Publication date: March 17, 2016
    Inventors: Myungahn OK, Jisu JEONG, BunYeoul LEE, Sujith S., Anish CYRIAC, JaeKi MIN, JongEon SEONG
  • Patent number: 9217057
    Abstract: Provided are a complex prepared from ammonium salt-containing ligands and having such an equilibrium structural formula that the metal center takes a negative charge of 2 or higher, and a method for preparing polycarbonate via copolymerization of an epoxide compound and carbon dioxide using the complex as a catalyst. When the complex is used as a catalyst for copolymerizing an epoxide compound and carbon dioxide, it shows high activity and high selectivity and provides high-molecular weight polycarbonate, and thus easily applicable to commercial processes. In addition, after forming polycarbonate via carbon dioxide/epoxide copolymerization using the complex as a catalyst, the catalyst may be separately recovered from the copolymer.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: December 22, 2015
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Myungahn Ok, Jisu Jeong, BunYeoul Lee, Sujith S., Anish Cyriac, JaeKi Min, JongEon Seong
  • Publication number: 20150175743
    Abstract: The present invention relates to a method of manufacturing a polycarbonate including the process of copolymerizing epoxide compound and CO2 using cobalt(III) or chromium(III), where the ligands contains at least 3 ammonium cations, central metal has formal ?1 charge, and conjugated anions of the two cationic ammonium groups are acid-base homoconjugation, as catalyst. According to the present invention, the initial induction time can be reduced when the polycarbonate is manufactured and it is possible to improve the activity of the catalyst and the molecular weight of the obtained polymer.
    Type: Application
    Filed: February 6, 2015
    Publication date: June 25, 2015
    Inventors: Jisu Jeong, Sujith Sudevan, Myung Ahn OK, Jieun Yoo, BunYeoul Lee, Sung-Jae Na
  • Patent number: 9023979
    Abstract: This invention relates to a method of preparing poly(alkylene carbonate) that has a molecular weight and polymer chain structure precisely controlled by adding a chain transfer agent composed of a compound having an alcohol or carboxylic acid functional group upon alternating copolymerization of an epoxide compound and carbon dioxide using a catalyst composed of a trivalent metal complex compound synthesized from a quaternary ammonium salt-containing Salen type ligand, and to a polymer compound prepared thereby. According to this invention, the polymer compound having a star-shaped chain as well as the polymer having a linear chain can be prepared. The low-molecular-weight poly(alkylene carbonate) has an —OH terminal group and can be used alone as a coating agent, etc., and also in mixtures with an isocyanate compound and thus can be easily utilized to prepare polyurethane.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: May 5, 2015
    Assignee: SK Innovation Co., Ltd.
    Inventors: JiSu Jeong, SungJae Na, Sujith Sudevan, MyungAhn Ok, Young Gyu Han, KwangJin Chung, BunYeoul Lee, Anish Cyriac
  • Patent number: 8987411
    Abstract: The present invention related to a method of manufacturing a polycarbonate including the process of copolymerizing epoxide compound and CO2 using cobalt(III) or chromium(III), where the ligands contains at least 3 ammonium cations, central metal has formal ?1 charge, and conjugated anions of the two cationic ammonium groups are acid-base homoconjugation, as catalyst. According to the present invention, the initial induction time can be reduced when the said polycarbonate is manufactured and it is possible to improve the activity of the catalyst and the molecular weight of the obtained polymer.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: March 24, 2015
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jisu Jeong, Sujith Sudevan, Myungahn Ok, Jieun Yoo, BunYeoul Lee, SungJae Na
  • Patent number: 8981043
    Abstract: The present invention related to a method of manufacturing a polycarbonate including the process of copolymerizing epoxide compound and CO2 using cobalt(III) or chromium(III), where the ligands contains at least 3 ammonium cations, central metal has formal ?1 charge, and conjugated anions of the two cationic ammonium groups are acid-base homoconjugation, as catalyst. According to the present invention, the initial induction time can be reduced when the said polycarbonate is manufactured and it is possible to improve the activity of the catalyst and the molecular weight of the obtained polymer.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: March 17, 2015
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jisu Jeong, Sujith Sudevan, Myungahn Ok, Jieun Yoo, BunYeoul Lee, SungJae Na
  • Publication number: 20140378651
    Abstract: There is provided a method for preparing a low-molecular weight poly(alkylene carbonate) of which the molecular weight and chain shape are precisely controlled, by introducing a phosphorous compound having a hydroxyl group as a chain transfer agent in order to regulate the molecular weight, in alternating copolymerizing an epoxide compound and carbon dioxide by using trivalent metal complex prepared from a Salen type ligand containing a quaternary ammonium salt, and a polymer prepared by the method. Since poly(alkylene carbonate) prepared according to the present invention includes a phosphate or phosphonate group in the polymer chain, it has flame-retarding property.
    Type: Application
    Filed: September 9, 2014
    Publication date: December 25, 2014
    Inventors: Jisu Jeong, SungJae Na, Sujith Sudevan, MyungAhn Ok, YongGyu Han, KwangJin Chung, BunYeoul Lee, Anish Cyriac, SangHwan Lee
  • Patent number: 8912307
    Abstract: There is provided a method for preparing a low-molecular weight poly(alkylene carbonate) of which the molecular weight and chain shape are precisely controlled, by introducing a phosphorous compound having a hydroxyl group as a chain transfer agent in order to regulate the molecular weight, in alternating copolymerizing an epoxide compound and carbon dioxide by using trivalent metal complex prepared from a Salen type ligand containing a quaternary ammonium salt, and a polymer prepared by the method. Since poly(alkylene carbonate) prepared according to the present invention includes a phosphate or phosphonate group in the polymer chain, it has flame-retarding property.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: December 16, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jisu Jeong, SungJae Na, Sujith Sudevan, MyungAhn Ok, YongGyu Han, KwangJin Chung, BunYeoul Lee, Anish Cyriac, SangHwan Lee
  • Patent number: 8900483
    Abstract: Disclosed is a polymer electrolyte composition, a gel-type polymer electrolyte obtained by mixing the same at normal temperature, and a dye-sensitized solar cell containing the electrolyte. Since the poly(alkylene carbonate)-based polymer is included, a crosslinking process by radiation of heat or UV is not required when the polymer electrolyte is manufactured, such that a manufacturing process is simple. Accordingly, the polymer electrolyte is useful for mass production of a solar cell and maintained in a uniform state without a phase separation between two components due to excellent affinity between the polymer and the organic solvent included in the electrolyte, and has excellent electrode-electrolyte interface property in the solar cell due to an adhesive property of the gelled polymer electrolyte.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: December 2, 2014
    Assignees: SK Innovation Co., Ltd., SK Global Chemical Co., Ltd.
    Inventors: Yonggyu Han, Sujith Sudevan, MyungAhn Ok, Jisu Jeong, SungJae Na, KwangJin Chung, Dong-Won Kim, YeonJeong Choi
  • Patent number: 8871898
    Abstract: Provided is a method for preparing poly(alkylene carbonate) containing ether linkages, by the copolymerization of an epoxy compound and carbon dioxide, with a trivalent metal complex prepared from a salen type ligand containing a quaternary ammonium salt, and a double metal cyanide (DMC) catalyst together. The amount of ether linkages can be controlled by regulating the weight ratio of two catalysts and the carbon dioxide pressure.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: October 28, 2014
    Assignees: SK Innovation Co., Ltd., SK Global Chemical Co., Ltd.
    Inventors: JiSu Jeong, SungJae Na, Sujith Sudevan, MyungAhn Ok, YongGyu Han, KwangJin Chung, BunYeoul Lee, Kodiyan Varghese Jobi
  • Publication number: 20140221605
    Abstract: Provided are a complex prepared from ammonium salt-containing ligands and having such an equilibrium structural formula that the metal center takes a negative charge of 2 or higher, and a method for preparing polycarbonate via copolymerization of an epoxide compound and carbon dioxide using the complex as a catalyst. When the complex is used as a catalyst for copolymerizing an epoxide compound and carbon dioxide, it shows high activity and high selectivity and provides high-molecular weight polycarbonate, and thus easily applicable to commercial processes. In addition, after forming polycarbonate via carbon dioxide/epoxide copolymerization using the complex as a catalyst, the catalyst may be separately recovered from the copolymer.
    Type: Application
    Filed: January 27, 2014
    Publication date: August 7, 2014
    Applicant: SK INNOVATION CO., LTD.
    Inventors: Myungahn Ok, Jisu Jeong, BunYeoul Lee, Sujith S., Anish Cyriac, JaeKi Min, JongEon Seong
  • Patent number: 8791274
    Abstract: Provided are a complex prepared from ammonium salt-containing ligands and having such an equilibrium structural formula that the metal center takes a negative charge of 2 or higher, and a method for preparing polycarbonate via copolymerization of an epoxide compound and carbon dioxide using the complex as a catalyst. When the complex is used as a catalyst for copolymerizing an epoxide compound and carbon dioxide, it shows high activity and high selectivity and provides high-molecular weight polycarbonate, and thus easily applicable to commercial processes. In addition, after forming polycarbonate via carbon dioxide/epoxide copolymerization using the complex as a catalyst, the catalyst may be separately recovered from the copolymer.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: July 29, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Myungahn Ok, Jisu Jeong, BunYeoul Lee, S. Sujith, Anish Cyriac, JaeKi Min, JongEon Seong
  • Publication number: 20140163179
    Abstract: Provided is preparation of poly(alkylene carbonate) by alternating copolymerization of carbon dioxide and epoxide. To be specific, provided are a method for preparing block or graft copolymers of the polymer compound and poly(alkylene carbonate) by alternating-copolymerization of an epoxide compound and carbon dioxide by using a metal (III) compound prepared from salen-type ligand with a quaternary ammonium salt as a catalyst in the presence of a polymer compound having a functional group of hydroxyl or carboxylic acid, and block or graft copolymers prepared by the method.
    Type: Application
    Filed: January 10, 2014
    Publication date: June 12, 2014
    Applicant: SK Innovation Co., Ltd.
    Inventors: JiSu Jeong, SungJae Na, Sujith Sudevan, MyungAhn Ok, YongGyu Han, KwangJin Chung, Bun Yeoul Lee, Anish Cyriac, SangHwan Lee