Patents by Inventor Yasunori Kouda

Yasunori Kouda 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).

  • Low temperature-fired porcelain articles and electronic parts including such porcelain articles
    Patent number: 6379805
    Abstract: A low temperature-fired porcelain article includes a barium component in an amount of 40 to 65 wt % when calculated as BaO, a silicon component in an amount of 25 to 46 wt % when calculated as SiO2, an aluminum component in an amount of 0.1 to 20 wt % when calculated as Al2O3, a boron component in an amount of 0.3 to 1.5 wt % when calculated as B2O3, and a zinc component in an amount of 0.5 to 20 wt % when calculated as ZnO, optionally also a chromium component in an amount of 0.5 to 3.5 wt % when calculated as Cr2O3 wherein the porcelain article has a dielectric constant ∈r of not more than 10, a quality coefficient Q of not less than 2500, and preferably has an absolute value of a temperature coefficient &tgr;f of the resonance frequency of not more than 30 ppm/° C.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: April 30, 2002
    Assignee: NGK Insulators, Ltd.
    Inventors: Takeshi Oobuchi, Yasunori Kouda, Hideyuki Baba