Patents by Inventor Youkreol Na

Youkreol Na 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).

  • Modified conjugated diene-based polymer, preparation method therefor, and rubber composition comprising same
    Patent number: 9695256
    Abstract: Disclosed is a method of preparing a modified conjugated diene-based polymer, including (a) polymerizing a conjugated diene monomer, or a conjugated diene monomer and an aromatic vinyl monomer, using the compound represented by Chemical Formula 1 in the presence of a solvent, thus obtaining an active polymer having a metal end, and (b) modifying the active polymer with the compound represented by Chemical Formula 2.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: July 4, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Sangmi Lee, Noma Kim, Romi Lee, Jinyoung Kim, Youkreol Na
  • MODIFIED CONJUGATED DIENE-BASED POLYMER, PREPARATION METHOD THEREFOR, AND RUBBER COMPOSITION COMPRISING SAME
    Publication number: 20160208023
    Abstract: Disclosed is a method of preparing a modified conjugated diene-based polymer, including (a) polymerizing a conjugated diene monomer, or a conjugated diene monomer and an aromatic vinyl monomer, using the compound represented by Chemical Formula 1 in the presence of a solvent, thus obtaining an active polymer having a metal end, and (b) modifying the active polymer with the compound represented by Chemical Formula 2.
    Type: Application
    Filed: October 17, 2014
    Publication date: July 21, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Sangmi Lee, Noma Kim, Romi Lee, Jinyoung Kim, Youkreol Na