Patents by Inventor Dae-Jong Seo

Dae-Jong Seo 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: 10773237
    Abstract: The present invention relates to a method for preparing a super absorbent polymer exhibiting improved liquid permeability, gel strength, absorption rate and the like while maintaining excellent absorption performance. The method for preparing the super absorbent polymer comprises the steps of: carrying out a crosslinking polymerization of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups in the presence of an internal crosslinking agent to form a hydrogel polymer including a cross-linked polymer; drying, pulverizing, and classifying the hydrogel polymer to form a base polymer powder; and surface-crosslinking the base polymer powder by using a surface crosslinking liquid containing a surface crosslinking agent of an alkylene carbonate having 2 to 5 carbon atoms, in the presence of hydrophobic silica particles having a water-contact angle of more than 10° and 150° or less and hydrophilic silica particles having a water-contact angle of 10° or less.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: September 15, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Hyung Ki Yoon, Dae Woo Nam, Hyemin Lee, Chang Sun Han, Sung Jong Seo
  • Publication number: 20200207760
    Abstract: An organic compound, an organic light emitting diode including the compound, and an organic light emitting device including the organic light emitting diode are disclosed. The organic compound may include a fused hetero aromatic moiety having a p-type property and an aza-acridine moiety having an n-type property bonded to the fused hetero aromatic moiety via an aromatic or a hetero aromatic linker. The organic compound has relatively high energy level since it includes plural fused hetero aromatic rings. Holes and electrons can be recombined in an emitting material layer in a balanced manner since the organic compound has a bipolar property. The organic light emitting diode and the organic light emitting device including the organic compound have enhanced luminous efficiency and luminous lifetime.
    Type: Application
    Filed: December 16, 2019
    Publication date: July 2, 2020
    Applicants: LG Display Co., Ltd, Korea University Research and Business Foundation
    Inventors: Bo-Min Seo, Dae-Wi Yoon, Joong-Hwan Yang, Dong-Hoon Choi, Su-Na Choi, Hyung-Jong Kim, Mallesham GODUMALA
  • Publication number: 20200168558
    Abstract: A semiconductor package includes: a frame having a first surface and a second surface opposing each other, and including a through-hole and a wiring structure connected to the first surface and the second surface; a connection structure disposed on the first surface of the frame and including a redistribution layer; a semiconductor chip disposed in the through-hole and including connection pads connected to the redistribution layer; an encapsulant encapsulating the semiconductor chip and covering the second surface of the frame; and a plurality of electrical connection metal members disposed on the second surface of the frame and connected to the wiring structure. The wiring structure includes a shielding wiring structure surrounding the through-hole, and the plurality of electrical connection metal members include a plurality of grounding electrical connection metal members connected to the shielding wiring structure.
    Type: Application
    Filed: June 6, 2019
    Publication date: May 28, 2020
    Inventors: Yoon Seok SEO, Dae Hyun PARK, Sang Jong LEE, Chul Kyu KIM, Jae Hyun LIM
  • Patent number: 10305946
    Abstract: Disclosed is a method and apparatus for providing a group call service using mobile voice over Internet protocol (mVolP). According to one embodiment, an interface is provided to transmit a request signal for a group call to members of a group chat room, and from among the group chat room members, it may be determined which members are able to participate in a group call as group call members. A new group call chat room may be created and include the group call members. The request signal may be transmitted in the created new group call chat room.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: May 28, 2019
    Assignee: KAKAO CORP.
    Inventors: Young Joon Ryu, Hyang Deok Yim, Choon Taek Kim, Jung Taek Kim, Se Jong Seo, Dae Gil Kim, Dong Kuk Woo, Seok Kyoo Lee, Ki Yong Sim, Jun Jae Kim, Chang Ho Park, Hyun Seok Hwang, Seong Hark Kang
  • Patent number: 9070930
    Abstract: The present invention relates to a method for manufacturing an electrode having an organic/inorganic composite porous coating layer comprising porous inorganic particles and a binder polymer, wherein the porous inorganic particles have pores having such a size that lithium ions (Li+) solvated in an electrolyte solvent can pass therethrough. The method comprises the steps of dispersing inorganic precursors and heat-decomposable compounds in a dispersion medium, misting the inorganic precursor solution, and performing a thermal decomposition and a crystallization processes, to thereby prepare porous inorganic particles, adding and mixing the porous inorganic particles to a polymer solution in which a binder polymer is dissolved, and coating the mixture onto a preliminarily formed electrode and drying the coating layer.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: June 30, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Dae-Jong Seo, Sang-Young Lee, Seok-Koo Kim, Jang-Hyuk Hong
  • Patent number: 8822073
    Abstract: Disclosed is an electrode comprising an organic/inorganic composite introduced onto either surface or both surfaces thereof, the organic/inorganic composite comprising inorganic particle or aggregates thereof having a unique spectrum or color pattern according to a predetermined rule, and a polymer capable of interconnecting and fixing the inorganic particles. Also, disclosed are an electrochemical device comprising the above electrode, and a method for identifying the origin or kind of an electrode itself or an electrochemical device comprising the same by using the above electrode.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: September 2, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Sang-Young Lee, Dae-Jong Seo, Dong-Myung Kim, Seok-Koo Kim, Hyun-Min Jang
  • Patent number: 8318360
    Abstract: The present invention provides an organic/inorganic composite porous separator, which comprises: (a) a porous substrate having pores; and (b) an organic/inorganic composite layer formed by coating at least one region selected from the group consisting of a surface of the substrate and a part of pores present in the substrate with a mixture of inorganic porous particles and a binder polymer, wherein the inorganic porous particles have a plurality of macropores with a diameter of 50 nm or greater in the particle itself thereby form a pore structure, a manufacturing method thereof, and an electrochemical device using the same. As an additional pathway for lithium ions is created due to a number of pores existing in the inorganic porous particle itself, degradation in the battery performance can be minimized, and energy density per unit weight can be increased by the weight loss effect.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: November 27, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Dae Jong Seo, Seok Koo Kim, Jang Hyuk Hong, Joon Yong Sohn, Sang Young Lee, Soon Ho Ahn
  • Publication number: 20120088029
    Abstract: The present invention relates to a method for manufacturing an electrode having an organic/inorganic composite porous coating layer comprising porous inorganic particles and a binder polymer, wherein the porous inorganic particles have pores having such a size that lithium ions (Li+) solvated in an electrolyte solvent can pass therethrough. The method comprises the steps of dispersing inorganic precursors and heat-decomposable compounds in a dispersion medium, misting the inorganic precursor solution, and performing a thermal decomposition and a crystallization processes, to thereby prepare porous inorganic particles, adding and mixing the porous inorganic particles to a polymer solution in which a binder polymer is dissolved, and coating the mixture onto a preliminarily formed electrode and drying the coating layer.
    Type: Application
    Filed: December 16, 2011
    Publication date: April 12, 2012
    Applicant: LG CHEM, LTD.
    Inventors: Dae-Jong SEO, Sang-Young LEE, Seok-Koo KIM, Jang-Hyuk HONG
  • Patent number: 8062795
    Abstract: Disclosed is a separator comprising inorganic particle or aggregates thereof having a unique spectrum or color pattern according to a predetermined rule. Also, disclosed are an electrochemical device comprising the above separator and a method for identifying the origin or kind of the separator itself or the electrochemical device comprising the same by using the above separator. Further, disclosed is a method for manufacturing the aforementioned separator, the method comprising a step of forming a specific pattern by coating inorganic particles having a unique spectrum or color pattern on at least one area selected from the group consisting of a surface of a porous substrate and a porous part of the substrate.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: November 22, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Sang-Young Lee, Dae-Jong Seo, Dong-Myung Kim, Seok-Koo Kim, Hyun-Min Jang
  • Publication number: 20110045168
    Abstract: The present invention provides an organic/inorganic composite porous separator, which comprises: (a) a porous substrate having pores; and (b) an organic/inorganic composite layer formed by coating at least one region selected from the group consisting of a surface of the substrate and a part of pores present in the substrate with a mixture of inorganic porous particles and a binder polymer, wherein the inorganic porous particles have a plurality of macropores with a diameter of 50 nm or greater in the particle itself thereby form a pore structure, a manufacturing method thereof, and an electrochemical device using the same. As an additional pathway for lithium ions is created due to a number of pores existing in the inorganic porous particle itself, degradation in the battery performance can be minimized, and energy density per unit weight can be increased by the weight loss effect.
    Type: Application
    Filed: November 1, 2010
    Publication date: February 24, 2011
    Applicant: LG CHEM, LTD.
    Inventors: Dae Jong SEO, Seok Koo KIM, Jang Hyuk HONG, Joon Yong SOHN, Sang Young LEE, Soon Ho AHN
  • Patent number: 7883799
    Abstract: The present invention provides an organic/inorganic composite porous separator, which comprises: (a) a porous substrate having pores; and (b) an organic/inorganic composite layer formed by coating at least one region selected from the group consisting of a surface of the substrate and a part of pores present in the substrate with a mixture of inorganic porous particles and a binder polymer, wherein the inorganic porous particles have a plurality of macropores with a diameter of 50 nm or greater in the particle itself thereby form a pore structure, a manufacturing method thereof, and an electrochemical device using the same. As an additional pathway for lithium ions is created due to a number of pores existing in the inorganic porous particle itself, degradation in the battery performance can be minimized, and energy density per unit weight can be increased by the weight loss effect.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: February 8, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Dae Jong Seo, Seok Koo Kim, Jang Hyuk Hong, Joon Yong Sohn, Sang Young Lee, Soon Ho Ahn
  • Publication number: 20100290044
    Abstract: Disclosed is an electrode comprising an organic/inorganic composite introduced onto either surface or both surfaces thereof, the organic/inorganic composite comprising inorganic particle or aggregates thereof having a unique spectrum or color pattern according to a predetermined rule, and a polymer capable of interconnecting and fixing the inorganic particles. Also, disclosed are an electrochemical device comprising the above electrode, and a method for identifying the origin or kind of an electrode itself or an electrochemical device comprising the same by using the above electrode.
    Type: Application
    Filed: July 18, 2007
    Publication date: November 18, 2010
    Applicant: LG Chem, Ltd.
    Inventors: Sang-Young Lee, Dae-Jong Seo, Dong-Myung Kim, Seok-Koo Kim, Hyun-Min Jang
  • Publication number: 20100285371
    Abstract: Disclosed is a separator comprising inorganic particle or aggregates thereof having a unique spectrum or color pattern according to a predetermined rule. Also, disclosed are an electrochemical device comprising the above separator and a method for identifying the origin or kind of the separator itself or the electrochemical device comprising the same by using the above separator. Further, disclosed is a method for manufacturing the aforementioned separator, the method comprising a step of forming a specific pattern by coating inorganic particles having a unique spectrum or color pattern on at least one area selected from the group consisting of a surface of a porous substrate and a porous part of the substrate.
    Type: Application
    Filed: September 21, 2007
    Publication date: November 11, 2010
    Applicant: LG CHEM, LTD.
    Inventors: Sang-Young Lee, Dae-Jong Seo, Dong-Myung Kim, Seok-Koo Kim, Hyun-Min Jang
  • Publication number: 20100167124
    Abstract: Disclosed is an electrode whose surface includes an organic/inorganic composite porous coating layer comprising porous inorganic particles and a binder polymer, wherein the porous inorganic particles have pores having such a size that lithium ions (Li+) solvated in an electrolyte solvent can pass therethrough. A method for manufacturing the electrode and an electrochemical device using the electrode are also disclosed. The organic/inorganic composite porous coating layer formed on the electrode according to the present invention provides an additional pathway for lithium ion conduction due to a plurality of pore structures present in the porous inorganic particles. Thus, when the organic/inorganic composite porous coating layer is used instead of a conventional polymer-based separator in a battery, the battery can provide improved quality and an increased energy density per unit weight due to a reduced weight of the organic/inorganic composite porous coating layer.
    Type: Application
    Filed: February 16, 2007
    Publication date: July 1, 2010
    Applicant: LG Chem, Ltd.
    Inventors: Dae-Jong Seo, Sang-Young Lee, Seok-Koo Kim, Jang-Hyuk Hong
  • Patent number: 7638241
    Abstract: Disclosed is an organic/inorganic composite separator including: a porous substrate having pores; and a porous active layer containing a mixture of inorganic particles and a binder polymer with which at least one surface of the porous substrate is coated. The organic/inorganic composite separator of the present invention may be useful to enhance peeling and scratch resistances and improve a lamination characteristic by introducing a porous active layer onto a porous substrate having pores, the porous active layer having heterogeneity of morphology toward a thickness direction in which a content ratio of the binder polymer/inorganic particles present in a surface layer is higher than that of the binder polymer/inorganic particles present inside the surface layer. Accordingly, the stability and performances of a battery can be improved together since the detachment of inorganic particles from the porous active layer may be reduced during the assembly process of the electrochemical device.
    Type: Grant
    Filed: December 6, 2006
    Date of Patent: December 29, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Sang-Young Lee, Dae-Jong Seo, Joon-Yong Sohn, Seok-Koo Kim, Jang-Hyuk Hong, Young-Soo Kim, Hyun-Min Jang
  • Publication number: 20080311479
    Abstract: Disclosed is an electrode having a current collector coated with an electrode active material, wherein non-coated regions of the electrode and boundary regions of intermittently pattern-coated electrodes are coated with a porous active layer including a mixture of inorganic particles and a binder polymer. The electrode of the present invention may be useful to improve safety of a battery and also minimize reduction in the capacity of a battery by introducing the porous active layer onto non-coated regions of the electrode and/or boundary regions of the intermittently pattern-coated electrodes to prevent internal short circuit caused by the contact between both electrodes, wherein the boundary regions are coated with the electrode active material but vulnerable to the electrical short circuit.
    Type: Application
    Filed: December 6, 2006
    Publication date: December 18, 2008
    Applicant: LG CHEM, LTD.
    Inventors: Sang-Young Lee, Dae-Jong Seo, Joon-Yong Sohn, Seok-Koo Kim, Jang-Hyuk Hong, Young-Soo Kim, Hyun- Min Jang
  • Publication number: 20080292968
    Abstract: Disclosed is an organic/inorganic composite separator including: a porous substrate having pores; and a porous active layer containing a mixture of inorganic particles and a binder polymer with which at least one surface of the porous substrate is coated. The organic/inorganic composite separator of the present invention may be useful to enhance peeling and scratch resistances and improve a lamination characteristic by introducing a porous active layer onto a porous substrate having pores, the porous active layer having heterogeneity of morphology toward a thickness direction in which a content ratio of the binder polymer/inorganic particles present in a surface layer is higher than that of the binder polymer/inorganic particles present inside the surface layer. Accordingly, the stability and performances of a battery can be improved together since the detachment of inorganic particles from the porous active layer may be reduced during the assembly process of the electrochemical device.
    Type: Application
    Filed: December 6, 2006
    Publication date: November 27, 2008
    Applicant: LG CHEM, LTD.
    Inventors: Sang-Young Lee, Dae-Jong Seo, Joon-Yong Sohn, Seok-Koo Kim, Jang-Hyuk Hong, Young-Soo Kim, Hyun-Min Jang