Patents by Inventor Ki Jae Lee

Ki Jae Lee 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).

  • COPOLYCARBONATE COMPOSITION AND ARTICLE CONTAINING THE SAME
    Publication number: 20170158852
    Abstract: The present invention relates to a copolycarbonate resin composition comprising a copolycarbonate in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and a UV stabilizer. Since the present copolycarbonate resin composition has excellent weather resistance, the article prepared by using this composition exhibits less deteriorated surface quality and physical properties caused by ultraviolet rays or the like when exposed to the outside.
    Type: Application
    Filed: December 3, 2015
    Publication date: June 8, 2017
    Inventors: Un KO, Hyong Min BAHN, Young Young HWANG, Jung Jun PARK, Moo Ho HONG, Ki Jae LEE, Byoung Kyu CHUN, Young Wook SON, Tae Yun KO
  • COPOLYCARBONATE AND COMPOSITION COMPRISING THE SAME
    Publication number: 20170137568
    Abstract: The present invention relates to copolycarbonates and a molded article comprising the same. The copolycarbonate according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and thus has characteristics of providing excellent residence heat stability.
    Type: Application
    Filed: December 2, 2015
    Publication date: May 18, 2017
    Inventors: Byoung Kyu CHUN, Hyong Min BAHN, Young Young HWANG, Jung Jun PARK, Moo Ho HONG, Ki Jae LEE, Un KO, Young Wook SON
  • COPOLYCARBONATE AND COMPOSITION CONTAINING THE SAME
    Publication number: 20160376405
    Abstract: The present invention relates to copolycarbonates and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate and thus, has characteristics of providing improved impact strength at low-temperature and improved YI (yellow index) simultaneously.
    Type: Application
    Filed: November 16, 2015
    Publication date: December 29, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Jung Jun PARK, Hyong Min BAHN, Young Young HWANG, Moo Ho HONG, Ki Jae LEE, Min Jeong KIM, Byoung Kyu CHUN, Un KO, Young Wook SON
  • COPOLYCARBONATE AND COMPOSITION COMPRISING THE SAME
    Publication number: 20160369047
    Abstract: The present invention relates to a copolycarbonate and a composition comprising the same. The copolycarbonates according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and thus exhibits improved chemical resistance and impact strength simultaneously.
    Type: Application
    Filed: November 16, 2015
    Publication date: December 22, 2016
    Inventors: Young Young HWANG, Hyong Min BAHN, Jung Jun PARK, Moo Ho HONG, Ki Jae LEE, Young Wook SON, Byoung Kyu CHUN, Un KO
  • COPOLYCARBONATE AND COMPOSITION CONTAINING THE SAME
    Publication number: 20160369048
    Abstract: The present invention relates to a copolycarbonate and a composition comprising the same. The copolycarbonates according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and has small difference between an impact strength at room temperature and an impact strength at low-temperature and thereby exhibits an excellent impact resistance.
    Type: Application
    Filed: November 16, 2015
    Publication date: December 22, 2016
    Inventors: Jung Jun PARK, Hyong Min BAHN, Young Young HWANG, Moo Ho HONG, Ki Jae LEE, Young Wook SON, Byoung Kyu CHUN, Un KO
  • POLYCARBONATE RESIN COMPOSITION
    Publication number: 20160369095
    Abstract: The present invention relates to a polycarbonate resin composition which may improve melting properties of a copolycarbonate in which a polysiloxane structure is introduced in a main chain of the polycarbonate. The present polycarbonate resin composition comprises a polycarbonate together with a copolycarbonate and thus may improve melting properties while maintaining the physical properties of the copolycarbonate to the maximum.
    Type: Application
    Filed: November 16, 2015
    Publication date: December 22, 2016
    Inventors: Jung Jun PARK, Hyong Min BAHN, Young Young HWANG, Moo Ho HONG, Ki Jae LEE, Byoung Kyu CHUN, Un KO, Young Wook SON
  • COPOLYCARBONATE AND COMPOSITION CONTAINING THE SAME (As Amended)
    Publication number: 20160326313
    Abstract: The present invention relates to a copolycarbonate and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and thus has effects of improving impact strength at low temperature, YI (Yellow Index) and melt index simultaneously.
    Type: Application
    Filed: December 4, 2015
    Publication date: November 10, 2016
    Inventors: Young Wook SON, Moo Ho HONG, Ki Jae LEE, Jung Jun PARK
  • COPOLYCARBONATE AND COMPOSITION CONTAINING THE SAME
    Publication number: 20160326314
    Abstract: The present invention relates to a copolycarbonate and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and thus exhibits an excellent transparency and a high spiral flow while having a high impact strength at room temperature and a low melt index.
    Type: Application
    Filed: December 4, 2015
    Publication date: November 10, 2016
    Inventors: Young Wook SON, Hyong Min BAHN, Young Young HWANG, Jung Jun PARK, Moo Ho HONG, Ki Jae LEE, Byoung Kyu CHUN, Un KO
  • COPOLYCARBONATE AND COMPOSITION COMPRISING THE SAME
    Publication number: 20160297925
    Abstract: The present invention relates to copolycarbonates and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which specific siloxane compounds are introduced in the main chain of polycarbonate and thus exhibits the effects of improving impact strength at room temperature, impact strength at low-temperature, and melt index.
    Type: Application
    Filed: September 4, 2015
    Publication date: October 13, 2016
    Inventors: Hyong Min BAHN, Moo Ho HONG, Jung Jun PARK, Byoung Kyu CHUN, Young Young HWANG, Min Jeong KIM, Un KO, Ki Jae LEE
  • COPOLYCARBONATE AND COMPOSITION COMPRISING THE SAME
    Publication number: 20160297926
    Abstract: The present invention relates to a copolycarbonate and a molded article comprising the same. The copolycarbonates according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and has effects of improving impact strength at room temperature, impact strength at low temperature, and melt index properties.
    Type: Application
    Filed: November 16, 2015
    Publication date: October 13, 2016
    Inventors: Young Young HWANG, Hyong Min BAHN, Jung Jun PARK, Moo Ho HONG, Ki Jae LEE, Byoung Kyu CHUN, Un KO, Young Wook SON
  • COPOLYCARBONATE AND COMPOSITION COMPRISING THE SAME
    Publication number: 20160251481
    Abstract: The present invention relates to copolycarbonates and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which specific siloxane compounds are introduced in the main chain of polycarbonate and thus exhibits the effects of improving impact strength at room temperature, impact strength at low-temperature and melt index.
    Type: Application
    Filed: September 4, 2015
    Publication date: September 1, 2016
    Inventors: Young Young HWANG, Hyong Min BAHN, Jung Jun PARK, Moo Ho HONG, Ki Jae LEE, Byoung Kyu CHUN, Un KO, Young Wook SON
  • Polycarbonate having high fluidity and method of preparing the same
    Patent number: 9328197
    Abstract: Disclosed are polycarbonate having high fluidity through inclusion of an aliphatic polyhydric alcohol-substituted diphenol compound in a polycarbonate backbone and a method of preparing the same. The polycarbonate is polymerized by comprising a diphenol mixture and a carbonate precursor, the diphenol mixture comprising an aliphatic polyhydric alcohol-substituted diphenol compound according to Formula 1 and a bisphenol compound.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: May 3, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Un Ko, Hyong Min Bahn, Moo Ho Hong, Byoung Kue Chun, Young Young Hwang, Min Jeong Kim, Jung Jun Park, Ki Jae Lee
  • Terminally modified polyoxyalkylene glycol and polycarbonate resin composition having improved optical characteristics comprising the same
    Patent number: 9303121
    Abstract: Disclosed are a terminally modified polyoxyalkylene glycol which may dramatically improve color uniformity and machinability, when applied to a polycarbonate resin transmittance, a polycarbonate resin composition comprising the same, and a light guide plate manufactured using the same.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: April 5, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Hyong Min Bahn, Un Ko, Min Jeong Kim, Hyun Jung Ryu, Jae Chan Park, Jung Jun Park, Ki Heung Yoo, Ki Jae Lee, Byeong Hoon Lee, Byoung Kue Chun, Moo Ho Hong, Young Young Hwang
  • Copolycarbonate resin and article including the same
    Patent number: 9255179
    Abstract: According to the present disclosure, a copolycarbonate being economically prepared, and having improved low-temperature impact strength with improved transparency and flowability which are conflicting properties with each other, simultaneously, and a molded article including the same, may be provided.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: February 9, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Jung Jun Park, Min Jeong Kim, Un Ko, Ki Jae Lee, Moo Ho Hong, Hyong Min Bahn, Byoung Kyu Chun, Young Young Hwang
  • COPOLYCARBONATE RESIN AND ARTICLE INCLUDING THE SAME
    Publication number: 20150344623
    Abstract: According to the present disclosure, a copolycarbonate being economically prepared, and having improved low-temperature impact strength with improved transparency and flowability which are conflicting properties with each other, simultaneously, and a molded article including the same, may be provided.
    Type: Application
    Filed: September 16, 2014
    Publication date: December 3, 2015
    Inventors: Jung Jun PARK, Min Jeong KIM, Un KO, Ki Jae LEE, Moo Ho HONG, Hyong Min BAHN, Byoung Kyu CHUN, Young Young HWANG
  • POLYCARBONATE HAVING HIGH FLUIDITY AND METHOD OF PREPARING THE SAME (As Amended)
    Publication number: 20150299387
    Abstract: Disclosed are polycarbonate having high fluidity through inclusion of an aliphatic polyhydric alcohol-substituted diphenol compound in a polycarbonate backbone and a method of preparing the same. The polycarbonate is polymerized by comprising a diphenol mixture and a carbonate precursor, the diphenol mixture comprising an aliphatic polyhydric alcohol-substituted diphenol compound according to Formula 1 and a bisphenol compound.
    Type: Application
    Filed: September 30, 2014
    Publication date: October 22, 2015
    Inventors: Un KO, Hyong Min BAHN, Moo Ho HONG, Byoung Kue CHUN, Young Young HWANG, Min Jeong KIM, Jung Jun PARK, Ki Jae LEE
  • TERMINALLY MODIFIED POLYOXYALKYLENE GLYCOL AND POLYCARBONATE RESIN COMPOSITION HAVING IMPROVED OPTICAL CHARACTERISTICS COMPRISING THE SAME
    Publication number: 20150247003
    Abstract: Disclosed are a terminally modified polyoxyalkylene glycol which may dramatically improve color uniformity and machinability, when applied to a polycarbonate resin transmittance, a polycarbonate resin composition comprising the same, and a light guide plate manufactured using the same.
    Type: Application
    Filed: August 29, 2014
    Publication date: September 3, 2015
    Applicant: LG Chem Ltd.
    Inventors: Hyong Min Bahn, Un Ko, Min Jeong Kim, Hyun Jung Ryu, Jae Chan Park, Jung Jun Park, Ki Heung Yoo, Ki Jae Lee, Byeong Hoon Lee, Byoung Kue Chun, Moo Ho Hong, Young Young Hwang