Patents by Inventor Byungchan HWANG

Byungchan HWANG 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).

  • Polymer composition
    Patent number: 11866551
    Abstract: The present invention provides a composition containing an electron-donating polymer (D) and an electron-withdrawing polymer (A), wherein the electron-donating polymer (D) has a constitutional unit represented by the following formula (1a), Y1a in the following formula (1a) is a divalent group represented by the following formula (3a), and the electron-withdrawing polymer (A) has a constitutional unit represented by the following formula (4a): wherein the symbols in the formulas are as described in the DESCRIPTION.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: January 9, 2024
    Assignees: NISSAN CHEMICAL CORPORATION, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Masamichi Nishihara, Shiyan Feng, Byungchan Hwang, Liana Christiani, Kazunari Sasaki, Shoichi Kondo, Taichi Nakazawa, Takamasa Kikuchi
  • POLYMER COMPOSITION
    Publication number: 20210047464
    Abstract: The present invention provides a composition containing an electron-donating polymer (D) and an electron-withdrawing polymer (A), wherein the electron-donating polymer (D) has a constitutional unit represented by the following formula (1a), Y1a in the following formula (1a) is a divalent group represented by the following formula (3a), and the electron-withdrawing polymer (A) has a constitutional unit represented by the following formula (4a): wherein the symbols in the formulas are as described in the DESCRIPTION.
    Type: Application
    Filed: February 8, 2019
    Publication date: February 18, 2021
    Applicants: NISSAN CHEMICAL CORPORATION, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Masamichi NISHIHARA, Shiyan FENG, Byungchan HWANG, Liana CHRISTIANI, Kazunari SASAKI, Shoichi KONDO, Taichi NAKAZAWA, Takamasa KIKUCHI