Patents by Inventor Shuichi Kakubari

Shuichi Kakubari 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).

  • Intergranular insulation type polycrystalline ceramic semiconductive composition
    Patent number: 3933668
    Abstract: An intergranular insulation type semiconductive ceramic composition comprising a major proportion of strontium titanate (SrTiO.sub.3), a minor amount of niobium oxide (Nb.sub.2 O.sub.5) or tantalum oxide (Ta.sub.2 O.sub.5), a minor amount of either germanium oxide (GeO.sub.2) or zinc oxide (ZnO) and having diffused therein either bismuth oxide (Bi.sub.2 O.sub.3) or a mixture of bismuth oxide, lead oxide (PbO) and boric oxide (B.sub.2 O.sub.3). The material is especially useful as a capacitor.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: January 20, 1976
    Assignees: Sony Corporation, Taiyo Yuden Co., Ltd.
    Inventors: Yasunori Takahashi, Nobutatsu Yamaoka, Yoshifumi Yamaoka, Shuichi Kakubari