Patents by Inventor Yu Jeong SONG

Yu Jeong SONG 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).

  • Preparation method of polythiol for optical lenses by using metal sulfide
    Patent number: 10723697
    Abstract: Provided is a preparation of a thioether-based polythiol in a high purity using a metal monosulfide for the incorporation of a thioether group, wherein the content of such components as a metal polysulfide present in the metal monosulfide is controlled to a predetermined level or lower. As a result, an optical lens of high quality with a high refractive index can be produced using the polythiol.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: July 28, 2020
    Assignee: SKC CO., LTD.
    Inventors: Junghwan Shin, Seung Mo Hong, Jongmin Shim, Hyuk Hee Han, Jung Hwan Myung, Hyeon Myeong Seo, Yu Jeong Song, JooYoung Jung
  • POLYTHIOL COMPOSITION WITH IMPROVED LONG-TERM STORAGE STABILITY AND OPTICAL LENSES USING SAME
    Publication number: 20180282269
    Abstract: Disclosed is to prevent generation of byproducts or a deterioration in the physical properties of a polythiol composition that may be caused by active oxygen during storage thereof by way of controlling the content of active oxygen in the polythiol composition after the synthesis of the polythiol. As a result, it is possible to enhance the long-term storage stability of a polythiol composition after it has been synthesized until it is used in the polymerization reaction.
    Type: Application
    Filed: March 30, 2018
    Publication date: October 4, 2018
    Applicant: SKC CO., LTD.
    Inventors: Junghwan SHIN, Seung Mo HONG, Jongmin SHIM, Hyuk Hee HAN, Jung Hwan MYUNG, Hyeon Myeong SEO, Yu Jeong SONG
  • PREPARATION METHOD OF POLYTHIOL FOR OPTICAL LENSES BY USING METAL SULFIDE
    Publication number: 20180282270
    Abstract: Provided is a preparation of a thioether-based polythiol in a high purity using a metal monosulfide for the incorporation of a thioether group, wherein the content of such components as a metal polysulfide present in the metal monosulfide is controlled to a predetermined level or lower. As a result, an optical lens of high quality with a high refractive index can be produced using the polythiol.
    Type: Application
    Filed: March 30, 2018
    Publication date: October 4, 2018
    Applicant: SKC CO., LTD.
    Inventors: Junghwan SHIN, Seung Mo HONG, Jongmin SHIM, Hyuk Hee HAN, Jung Hwan MYUNG, Hyeon Myeong SEO, Yu Jeong SONG, JooYoung JUNG