Patents by Inventor Hyun-Jun Ju

Hyun-Jun Ju 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: 11952442
    Abstract: The present disclosure provides a method for preparing a vinyl chloride-based polymer, the method including a step of injecting an ionizable normal salt and polymerizing a vinyl chloride monomer in the presence of one or more emulsifiers and a polymerization initiator, wherein the ionizable normal salt includes a carbonate metal salt or a sulfite metal salt, and the ionizable normal salt is continuously injected in an amount of 70 to 1200 ppm based on the total weight of the vinyl chloride monomer when a polymerization conversion rate is in a range of 0% to 20%. The method capable of preparing a vinyl chloride-based polymer suitable as an eco-friendly material, while not affecting the rate of polymerization reaction and decreasing the generation amount of total volatile organic compounds by controlling the injection time, injection amount and kind of the ionizable normal salt, is provided.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: April 9, 2024
    Assignee: LG CHEM, LTD.
    Inventors: Jin Hyuck Ju, Hyun Min Lee, Hyun Kyou Ha, Kun Ji Kim, Kwang Jin Lee, Yang Jun Jeon, Jae Hyun Park
  • Patent number: 11952443
    Abstract: The present disclosure relates to a composition for preparing a vinyl chloride-based polymer and a method of preparing a vinyl chloride-based polymer using the same, and provides the composition giving excellent productivity for preparing a vinyl chloride-based polymer includes while maintaining excellent foaming and viscosity properties of a plastisol including the prepared vinyl chloride-based polymer, by including a pH regulator composed of a carbonate-based metal salt, and a transition metal catalyst in the composition, and controlling an amount of the transition metal catalyst, and controlling an amount of a reducing agent such that a trace amount or none of the reducing agent is included, and the method of preparing a vinyl chloride-based polymer using the same.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: April 9, 2024
    Assignee: LG CHEM, LTD.
    Inventors: Yang Jun Jeon, Hyun Min Lee, Hyun Kyou Ha, Kun Ji Kim, Kwang Jin Lee, Jin Hyuck Ju, Jae Hyun Park
  • Patent number: 7756819
    Abstract: Disclosed are an integrated authoring system for an electronic technical manual and a paper technical manual using logistics support analysis data, which is capable of authoring an interactive electronic technical manual (IETM) of Class IV level and a paper technical manual at the same time. The integrated authoring system for an electronic technical manual and a paper technical manual using logistics support analysis data comprises: an iCAST-LSA (intelligent computer based acquisition support tool-logistics support analysis) module; a TMM (Technical Manual Management) module for performing a technical manual management function by importing from the DB of the iCAST-LSA module or exporting to the DB of the iCAST-LSA module; an illustrated drawing manager module; and a TMA (Technical Manual Author) module for performing a manual author manager function for sending and receiving illustrated drawings (ID) or CGM data to and from the illustrated drawing manager module.
    Type: Grant
    Filed: August 17, 2005
    Date of Patent: July 13, 2010
    Assignee: Agency for Defense Development
    Inventors: Myung-Jin Jang, Byung-Jik Yoo, Kwang-Taek Lee, Hyun-Jun Ju
  • Publication number: 20060149770
    Abstract: Disclosed are an integrated authoring system for an electronic technical manual and a paper technical manual using logistics support analysis data, which is capable of authoring an interactive electronic technical manual (IETM) of Class IV level and a paper technical manual at the same time. The integrated authoring system for an electronic technical manual and a paper technical manual using logistics support analysis data comprises: an iCAST-LSA (intelligent computer based acquisition support tool-logistics support analysis) module; a TMM (Technical Manual Management) module for performing a technical manual management function by importing from the DB of the iCAST-LSA module or exporting to the DB of the iCAST-LSA module; an illustrated drawing manager module; and a TMA (Technical Manual Author) module for performing a manual author manager function for sending and receiving illustrated drawings (ID) or CGM data to and from the illustrated drawing manager module.
    Type: Application
    Filed: August 17, 2005
    Publication date: July 6, 2006
    Inventors: Myung-Jih Jang, Byung-Jik Yoo, Kwang-Taek Lee, Hyun-Jun Ju