Patents by Inventor Il Hwan YANG

Il Hwan YANG 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 preparing aromatic carbonate
    Patent number: 9765013
    Abstract: A method for preparing an aromatic carbonate, of the present invention, comprises the steps of: (A) preparing a reaction mixture containing an aliphatic carbonate by reacting an organometallic compound and carbon dioxide; and (B) preparing an aromatic carbonate by reacting the reaction mixture and an aromatic alcohol. The method for preparing an aromatic carbonate allows an aromatic carbonate to be economically prepared in a high yield by using carbon dioxide as a carbonyl supply source.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: September 19, 2017
    Assignee: Lotte Advanced Materials Co., Ltd.
    Inventors: Chang Hoon Lee, Dong Baek Kim, Yeon Ju Lee, O Sung Kwon, Il Hwan Yang
  • Method for Preparing Aromatic Carbonate
    Publication number: 20160237019
    Abstract: A method for preparing an aromatic carbonate, of the present invention, comprises the steps of: (A) preparing a reaction mixture containing an aliphatic carbonate by reacting an organometallic compound and carbon dioxide; and (B) preparing an aromatic carbonate by reacting the reaction mixture and an aromatic alcohol. The method for preparing an aromatic carbonate allows an aromatic carbonate to be economically prepared in a high yield by using carbon dioxide as a carbonyl supply source.
    Type: Application
    Filed: January 16, 2014
    Publication date: August 18, 2016
    Inventors: Chang Hoon LEE, Dong Baek KIM, Yeon Ju LEE, O Sung KWON, Il Hwan YANG
  • Polycarbonate resin, production method for same, and molded article comprising same
    Patent number: 9394403
    Abstract: The polycarbonate resin of the present invention comprises: a repeating unit represented by formula 1 of claim 1; and a repeating unit represented by formula 2 of claim 1. The polycarbonate resin has excellent scratch resistance, transparency and tensile elongation.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: July 19, 2016
    Assignee: Cheil Industries Inc.
    Inventors: Jong Chan Hur, O Sung Kwon, Il Hwan Yang, Dong Geun Lee, Bok Nam Jang, Jun Ho Chi, Woo Suk Chei
  • Polycarbonate Resin, Production Method for Same, and Molded Article Comprising Same
    Publication number: 20150299388
    Abstract: The polycarbonate resin of the present invention comprises: a repeating unit represented by formula 1 of claim 1; and a repeating unit represented by formula 2 of claim 1. The polycarbonate resin has excellent scratch resistance, transparency and tensile elongation.
    Type: Application
    Filed: January 30, 2013
    Publication date: October 22, 2015
    Inventors: Jong Chan HUR, O Sung KWON, Il Hwan YANG, Dong Geun LEE, Bok Nam JANG, Jun Ho CHI, Woo Suk CHEI