Patents by Inventor Byoungkue Chun

Byoungkue Chun 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).

  • Polycarbonate resin composition and optical molded article using the same
    Patent number: 11066516
    Abstract: The present invention relates to a polycarbonate resin composition for a light guide plate and an optical molded article using the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color tone uniformity required as the light guide plate, and also is excellent in processability and thus can be usefully used as a material of the light guide plate.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: July 20, 2021
    Assignee: LG Chem, Ltd.
    Inventors: Byoungkue Chun, Moo Ho Hong, Hyong Min Bahn, Un Ko
  • Polycarbonate resin composition and optical molded article using the same
    Patent number: 10995214
    Abstract: The present invention relates to a polycarbonate resin composition and an optical molded article comprising the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color stability and thus can ensure high transparency, and further can enhance the stability of a polycarbonate resin.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: May 4, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Byoungkue Chun, Un Ko, Young Wook Son, Moo Ho Hong, Hyong Min Bahn, Tae Yun Ko
  • POLYCARBONATE RESIN COMPOSITION AND OPTICAL MOLDED ARTICLE USING THE SAME
    Publication number: 20200317912
    Abstract: The present invention relates to a polycarbonate resin composition and an optical molded article comprising the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color stability and thus can ensure high transparency, and further can enhance the stability of a polycarbonate resin.
    Type: Application
    Filed: October 18, 2017
    Publication date: October 8, 2020
    Inventors: Byoungkue CHUN, Un KO, Young Wook SON, Moo Ho HONG, Hyong Min BAHN, Tae Yun KO
  • Method for preparing polycarbonate
    Patent number: 10538620
    Abstract: The present invention provides a method for preparing a polycarbonate by removing a solvent from a polycarbonate polymerization solution without impairing the physical properties of the polycarbonate.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: January 21, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Un Ko, Byoungkue Chun, Moo Ho Hong, Young Wook Son, Tae Yun Ko
  • Method for preparing polycarbonate
    Patent number: 10494478
    Abstract: The present invention provides a method for preparing a polycarbonate by removing a solvent from a polycarbonate polymerization solution without impairing the physical properties of the polycarbonate.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: December 3, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Un Ko, Byoungkue Chun, Moo Ho Hong, Young Wook Son, Tae Yun Ko
  • POLYCARBONATE RESIN COMPOSITION AND OPTICAL MOLDED ARTICLE USING THE SAME
    Publication number: 20190300648
    Abstract: The present invention relates to a polycarbonate resin composition for a light guide plate and an optical molded article using the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color tone uniformity required as the light guide plate, and also is excellent in processability and thus can be usefully used as a material of the light guide plate.
    Type: Application
    Filed: June 12, 2019
    Publication date: October 3, 2019
    Inventors: Byoungkue CHUN, Moo Ho HONG, Hyong Min BAHN, Un KO
  • Polycarbonate resin composition and optical molded article using the same
    Patent number: 10385163
    Abstract: The present invention relates to a polycarbonate resin composition for a light guide plate and an optical molded article using the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color tone uniformity required as the light guide plate, and also is excellent in processability and thus can be usefully used as a material of the light guide plate.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: August 20, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Byoungkue Chun, Moo Ho Hong, Hyong Min Bahn, Un Ko
  • METHOD FOR PREPARING POLYCARBONATE
    Publication number: 20190085122
    Abstract: The present invention provides a method for preparing a polycarbonate by removing a solvent from a polycarbonate polymerization solution without impairing the physical properties of the polycarbonate.
    Type: Application
    Filed: June 29, 2017
    Publication date: March 21, 2019
    Inventors: Un KO, Byoungkue CHUN, Moo Ho HONG, Young Wook SON, Tae Yun KO
  • POLYCARBONATE RESIN COMPOSITION
    Publication number: 20190016884
    Abstract: The present invention relates to a polycarbonate resin composition. The polycarbonate resin composition exhibits excellent optical properties, and thus can be used as a material for a light guide plate.
    Type: Application
    Filed: October 11, 2017
    Publication date: January 17, 2019
    Inventors: Young Wook SON, Byoungkue CHUN, Moo Ho HONG, Un KO, Tae Yun KO
  • POLYCARBONATE RESIN COMPOSITION AND OPTICAL MOLDED ARTICLE USING THE SAME
    Publication number: 20180051133
    Abstract: The present invention relates to a polycarbonate resin composition for a light guide plate and an optical molded article using the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color tone uniformity required as the light guide plate, and also is excellent in processability and thus can be usefully used as a material of the light guide plate.
    Type: Application
    Filed: January 11, 2017
    Publication date: February 22, 2018
    Inventors: Byoungkue CHUN, Moo Ho HONG, Hyong Min BAHN, Un KO
  • Hydroxypivalyl hydroxypivalate ester plasticizer composition and method of preparing the same
    Patent number: 7524896
    Abstract: Provided are a plasticizer composition including a hydroxypivalyl hydroxypivalate ester and a neopentylglycol ester, and a method of preparing the plasticizer composition. The plasticizer composition provides a polyvinyl chloride resin having excellent properties of heat loss, migration resistance and plasticization efficiency, and tensile strength, elongation, etc.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: April 28, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Hyunkyu Kim, Kyeseok Lee, Kyu Il Lee, Byoungkue Chun
  • Triethyleneglycol ester based plasticizer composition for polyvinyl chloride resin and method of preparing the same
    Patent number: 7326804
    Abstract: Provided is a novel triethyleneglycol based compound, a plasticizer composition for polyvinyl chloride resin including the same, and a method of preparing the plasticizer composition. In particular, the plasticizer composition for polyvinyl chloride resin includes the novel compound, 2-(2-(2-(2-ethylhexanoyloxy)ethoxy)ethoxy)ethyl 2-ethylhexanoate, and 2-(2-(2-phenylcarbonyloxyethoxy)ethoxy)ethyl benzoate in a proper mixture ratio. A polyvinyl chloride prepared using the plasticizer composition has low heating loss, excellent adhesion, high plasticization efficiency, high elongation, high tensile strength, and high transparency.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: February 5, 2008
    Assignee: LG Chem, Ltd.
    Inventors: Hyunkyu Kim, Kyeseok Lee, Kyu Il Lee, Byoungkue Chun
  • Hydroxypivalyl hydroxypivalate ester plasticizer composition and method of preparing the same
    Publication number: 20070015933
    Abstract: Provided are a plasticizer composition including a hydroxypivalyl hydroxypivalate ester and a neopentylglycol ester, and a method of preparing the plasticizer composition. The plasticizer composition provides a polyvinyl chloride resin having excellent properties of heat loss, migration resistance and plasticization efficiency, and tensile strength, elongation, etc.
    Type: Application
    Filed: July 17, 2006
    Publication date: January 18, 2007
    Inventors: Hyunkyu Kim, Kyeseok Lee, Kyu Lee, Byoungkue Chun
  • Triethyleneglycol ester based plasticizer composition for polyvinyl chloride resin and method of preparing the same
    Publication number: 20060229394
    Abstract: Provided is a novel triethyleneglycol based compound, a plasticizer composition for polyvinyl chloride resin including the same, and a method of preparing the plasticizer composition. In particular, the plasticizer composition for polyvinyl chloride resin includes the novel compound, 2-(2-(2-(2-ethylhexanoyloxy)ethoxy)ethoxy)ethyl 2-ethylhexanoate, and 2-(2-(2-phenylcarbonyloxyethoxy)ethoxy)ethyl benzoate in a proper mixture ratio. A polyvinyl chloride prepared using the plasticizer composition has low heating loss, excellent adhesion, high plasticization efficiency, high elongation, high tensile strength, and high transparency.
    Type: Application
    Filed: April 12, 2006
    Publication date: October 12, 2006
    Inventors: Hyunkyu Kim, Kyeseok Lee, Kyu Lee, Byoungkue Chun