Patents by Inventor Yasuo Miyashita

Yasuo Miyashita 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).

  • Dielectric ceramic composition for multilayer capacitor
    Patent number: 4803591
    Abstract: A dielectric ceramic composition for multilayer ceramic capacitors is provided which consisting essentially of 94.70-99.39 mole % of barium titanate, 0.50-3.00 mole % of niobium pentoxide, 0.10-2.00 mole % of zinc oxide, and 0.01-0.30 mole % in terms of manganese dioxide.
    Type: Grant
    Filed: January 30, 1987
    Date of Patent: February 7, 1989
    Assignee: Mitsubishi Mining & Cement Company, Ltd.
    Inventors: Yasuo Miyashita, Masao Kashima
  • Composition for ceramic dielectrics
    Patent number: 4468472
    Abstract: A composition for ceramic dielectrics comprising BaO, CeO.sub.2, ZrO.sub.2, CaO and TiO.sub.2 in sintered state. The composition can also contain at least one of MnO.sub.2, Cr.sub.2 O.sub.3, FeO, NiO, and CoO as additive. As the composition is very fine in grain size, and has a prolonged life, it is very suitable for a raw material of such a product as a layer-built capacitor which is used in high electric field.
    Type: Grant
    Filed: December 13, 1982
    Date of Patent: August 28, 1984
    Assignee: Mitsubishi Mining & Cement Company, Ltd.
    Inventors: Masao Kashima, Yasuo Miyashita
  • Composition for ceramic dielectrics
    Patent number: 4468471
    Abstract: A temperature compensating composition for ceramic dielectrics comprising La.sub.2 O.sub.3 --TiO.sub.2 --CaO--MgO based composite as a main component and ZrO.sub.2 as an additive respectively sintered. As the composition is very fine in grain size, it is a very suitable raw material for such a product as a layer-built capacitor which is used in a high electric field.
    Type: Grant
    Filed: March 3, 1983
    Date of Patent: August 28, 1984
    Assignee: Mitsubishi Mining & Cement Company, Ltd.
    Inventors: Masao Kashima, Yasuo Miyashita
  • Ceramic capacitor
    Patent number: 4447853
    Abstract: There is disclosed a ceramic capacitor comprising a polycrystalline ceramic dielectric material disposed between electrodes of conductive material with the polycrystalline ceramic dielectric material having a thickness not more than 30 .mu.m and a particle size not more than one fifth of the thickness of the dielectric material.
    Type: Grant
    Filed: August 1, 1983
    Date of Patent: May 8, 1984
    Assignee: Mitsubishi Mining & Cement Company, Ltd.
    Inventors: Noboru Tomuro, Isao Ishiguchi, Shinjiro Tsujikawa, Masao Kashima, Yasuo Miyashita