Patents by Inventor Eiko Watanabe

Eiko Watanabe 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).

  • Polyhydric phenol compounds, epoxy resins, epoxy resin compositions and cured products thereof
    Patent number: 6420464
    Abstract: Resin compositions having a low viscosity, a low hygroscopicity, high adhesive properties and a high heat resistance as well as being light in weight and excellent in mechanical properties are provided. The resin compositions include polyhydric phenol compounds represented by the formula (1) and epoxy resins represented by the formula (3).
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: July 16, 2002
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Kenichi Kuboki, Yoshitaka Kajiwara, Eiko Watanabe, Yoshio Shimamura, Katsuhiko Oshimi