Patents by Inventor Bunji Yamaguchi

Bunji Yamaguchi 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).

  • Patent number: 6958184
    Abstract: A fire-resistant sheet-like molded article comprising a resin composition and having the relationship between the initial thickness t (mm) and temperature difference ?T(° C.) between one side and the reverse side after heating of said one side at 500° C. for 1 hour as represented by: ?T?0.015t4?0.298t3+1.566t2+30.151t, and having the initial bulk density at 25° C. of 0.8 to 8.0 g/cm3 and the bulk density after 1 hour of heating at 500° C. of 0.05 to 0.5 g/cm3 is provided along with a method of fabricating a fire-resistant structural steel and fire-resistant wall.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: October 25, 2005
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Masaki Tono, Bunji Yamaguchi, Kazuyuki Yahara, Hitomi Muraoka, Norio Numata
  • Publication number: 20030008119
    Abstract: A fire-resistant sheet-like molded article comprising a resin composition and having the relationship between the initial thickness t (mm) and temperature difference &Dgr;T(° C.) between one side and the reverse side after heating of said one side at 500° C.
    Type: Application
    Filed: April 2, 2002
    Publication date: January 9, 2003
    Inventors: Masaki Tono, Bunji Yamaguchi, Kazuyuki Yahara, Hitomi Muraoka, Norio Numata
  • Patent number: 6410122
    Abstract: A fire-resistant sheet-like molded article having flame resistance and capable of producing good fire-resisting properties as the result of residues after combustion having sufficient shape-retaining property and, further, having good workability, a fire-resistant laminate for covering structural steels and a fire-resistant structural material for walls in which said molded article is used as well as a method of fabricating a fire-resistant structural steel and a fire-resistant wall. A fire resistant sheet-like molded article comprising a resin composition and having the-relationship between the initial thickness t (mm) and temperature difference &Dgr;T (° C.) between one side and the reverse side after heating of said one side at 500° C. for 1 hour as represented by: &Dgr;T≧0.015t4−0.298t3+1.566t2+30.151t, and having the initial bulk density at 25° C. of 0.8 to 2.0 g/cm3 and the bulk density after 1 hour of heating at 500° C. of 0.05 to 0.5 g/cm3.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: June 25, 2002
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Masaki Tono, Bunji Yamaguchi, Kazuyuki Yahara, Hitomi Muraoka, Norio Numata