Patents by Inventor Koyoyuki Namura

Koyoyuki Namura 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).

  • Flame-retarded thermosetting resin composition, prepregs and electrical laminates made therefrom
    Patent number: 5360887
    Abstract: A flame-retarded thermosetting resin composition is provided by blending about 5 to 45 mole % of a phenylcyanate having at least one halogen substituent at the ortho or para position relative to the cyanato group, and about 55 to 95 mole % of a halogen-free bis-4-phenylcyanate. A flame retardancy of V-O grade of UL94 is achieved in the thermoset resin of the composition without compromising dielectric, heat resistance, moisture absorption and other properties.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: November 1, 1994
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hidenari Tsunemi, Toshinobu Nakata, Koyoyuki Namura