Patents by Inventor Fujio Makuta

Fujio Makuta 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).

  • Patent number: 7591965
    Abstract: A lead-free resistance paste and a lead-free resistor that is formed with the resistance paste and has a high resistance value and excellent electric characteristics are disclosed. The resistance paste is substantially made of electrically conductive particles, glass frit and an organic vehicle, wherein the electrically conductive particles are made of iridium dioxide (IrO2) alone, or of iridium dioxide and ruthenium dioxide (RuO2) which has an average particle diameter of 1.0 ?m or less, and the glass frit is glass frit that has an average particle diameter of 5 ?m or less and does not contain lead such as borosilicate glass.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: September 22, 2009
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Fujio Makuta, Toshiki Maeda
  • Publication number: 20060208234
    Abstract: A lead-free resistance paste and a lead-free resistor that is formed with the resistance paste and has a high resistance value and excellent electric characteristics are disclosed. The resistance paste is substantially made of electrically conductive particles, glass frit and an organic vehicle, wherein the electrically conductive particles are made of iridium dioxide (IrO2) alone, or of iridium dioxide and ruthenium dioxide (RuO2) which has an average particle diameter of 1.0 ?m or less, and the glass frit is glass frit that has an average particle diameter of 5 ?m or less and does not contain lead such as borosilicate glass.
    Type: Application
    Filed: March 16, 2006
    Publication date: September 21, 2006
    Inventors: Fujio Makuta, Toshiki Maeda
  • Publication number: 20050268747
    Abstract: A valve metal powder with optimized particle size distribution, and a solid electrolytic capacitor which uses this is provided. A valve metal powder for a solid electrolytic capacitor is used which is an agglomerate powder to be used for manufacturing an anode with a structure in which valve metal powder is formed in a layer on a valve metal base material, and contains at least 90% of all the powder within a particle size range of 1 ?m to 50 ?m. It is desirable that at least 90% of all the powder is contained within a particle size range of 1 ?m to 30 ?m. Moreover, preferably the product of BET specific surface area and specific gravity (d25) is greater than 17 m2/g.
    Type: Application
    Filed: August 20, 2004
    Publication date: December 8, 2005
    Inventors: Katsuhiro Yoshida, Tadamasa Asami, Fujio Makuta, Toshiyuki Osako, Tomio Tsujimura
  • Patent number: 5567358
    Abstract: The temperature coefficient of resistance (TCR) is made zero with reduced noise in a thick film resistor composition essentially consisting of Pb.sub.2 Ru.sub.2 O.sub.6-7, organic vehicle and non-conductive glass by adding Ta.sub.2 O.sub.5 up to five weight %.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: October 22, 1996
    Assignee: Sumitomo Metal Mining Company Limited
    Inventors: Fujio Makuta, Hiroshi Fukaya, Katsuhiro Kawakubo