Patents by Inventor Chang Kwon Chung

Chang Kwon Chung 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).

  • Method for selecting material of injection-molded article and method for manufacturing injection-molded article
    Patent number: 11292165
    Abstract: The present application relates to a method for selecting an injection-molded article and a method for manufacturing an injection-molded article. An injection-molded article having excellent crack stability can be produced using the material selected using the described selection method without having to manufacture test articles through injection molding.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: April 5, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Hyun Sup Lee, Soon Ho Sun, Yi Young Choi, Ki Soo Lee, Bog Ki Hong, Sung Hyun Park, Myung Han Lee, Chang Kwon Chung
  • Extrusion die and extrusion method of sheet using the same
    Patent number: 11267180
    Abstract: The present invention relates to an extrusion die and a method for extruding a sheet using the same, and according to one aspect of the present invention, there is provided an extrusion die comprising a storage part configured to hold a raw material, the storage part defining a first width, a pressure part configured to move the raw material through the storage part, a first die defining a second width less than the first width, such that a flow width of the raw material becomes narrower, a second die in fluid communication with the first die, the second die defining a width that increases from the second width to a third width, such that the flow width of the raw material passing through the first die becomes wider and a flow thickness becomes smaller, and a heating part configured to heat the raw material passing through the second die.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: March 8, 2022
    Inventors: Chae Gyu Lee, Myung Han Lee, Byeong In Ahn, Kyung Hwan Yoon, Chang Kwon Chung
  • METHOD FOR SELECTING MATERIAL OF INJECTION-MOLDED ARTICLE AND METHOD FOR MANUFACTURING INJECTION-MOLDED ARTICLE
    Publication number: 20200282609
    Abstract: The present application relates to a method for selecting an injection-molded article and a method for manufacturing an injection-molded article.
    Type: Application
    Filed: September 29, 2017
    Publication date: September 10, 2020
    Inventors: Hyun Sup LEE, Soon Ho SUN, Yi Young CHOI, Ki Soo LEE, Bog Ki HONG, Sung Hyun PARK, Myung Han LEE, Chang Kwon CHUNG
  • Extrusion Die and Extrusion Method of Sheet Using the Same
    Publication number: 20190375144
    Abstract: The present invention relates to an extrusion die and a method for extruding a sheet using the same, and according to one aspect of the present invention, there is provided an extrusion die comprising a storage part configured to hold a raw material, the storage part defining a first width, a pressure part configured to move the raw material through the storage part, a first die defining a second width less than the first width, such that a flow width of the raw material becomes narrower, a second die in fluid communication with the first die, the second die defining a width that increases from the second width to a third width, such that the flow width of the raw material passing through the first die becomes wider and a flow thickness becomes smaller, and a heating part configured to heat the raw material passing through the second die.
    Type: Application
    Filed: January 26, 2018
    Publication date: December 12, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Chae Gyu Lee, Myung Han Lee, Byeong In Ahn, Kyung Hwan Yoon, Chang Kwon Chung