Patents by Inventor Byong-wa Chun

Byong-wa Chun 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).

  • Cement and cement composition having improved rheological properties
    Patent number: 5583183
    Abstract: An improved hydraulic cement and resultant hydraulic cement composition having an imidized acrylic polymer uniformly distributed therein.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: December 10, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David C. Darwin, Ellis M. Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo
  • Cement and cement composition having improved rheological properties
    Patent number: 5393343
    Abstract: An improved hydraulic cement and resultant hydraulic cement composition having an imidized acrylic polymer uniformly distributed therein.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: February 28, 1995
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David C. Darwin, Ellis M. Gartner, Byong-Wa Chun, Hideo Koyata, Lawrence L. Kuo