Patents by Inventor Yoshiaki Iguchi

Yoshiaki Iguchi 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: 5683489
    Abstract: A method for producing iron carbide by bringing iron ore into contact with a reducing gas containing hydrogen and a carbon compound at a specified reaction temperature to reduce and carburize the iron ore with the participation of a sulfur component, the method includes measuring the reaction temperature, partial pressure P(H.sub.2) of the hydrogen and partial pressure P(H.sub.2 S) of hydrogen sulfide contained in the reducing gas, calculating sulfur activity as in the reducing gas from equation (1) shown below, and adjusting the partial pressure P(H.sub.2 S) of the hydrogen sulfide in the reducing gas to obtain as=1.0 to 2.0. at reaction temperatures of 550.degree. C. and above but less than 650.degree. C., as=0.7 to 2.0 at 650.degree. C., and as=0.05 to 1.0 at over 650.degree. C. and up to 950.degree. C.:as=(P(H.sub.2 S)/P(H.sub.2))/(P(H.sub.2 S)/P(H.sub.2))E (1)where (P(H.sub.2 S)/P(H.sub.2)) represents the ratio between the partial pressures of H.sub.2 S and H.sub.2 in the reducing gas and (P(H.sub.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: November 4, 1997
    Assignees: Shoji Hayashi, Yoshiaki Iguchi, Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Shoji Hayashi, Yoshiaki Iguchi, Yukihiro Hida, Satoshi Sawai
  • Patent number: 4901044
    Abstract: A quarter-wave distributed-constant dielectric filter or resonator having a ceramic body which typically is composed principally of barium titanate. The ceramic filter body has one or more resonance holes extending therethrough. A conductive covering of silver or the like on the filter body has a portion formed on the surface defining each resonance hole. Mounted in each resonance hole is a prefabricated capacitor having a first terminal extending from within the resonance hole. The second terminal is electrically coupled to the conductive covering on the surface of the resonance hole. The capacitance of the capacitor or capacitors can be known before they are mounted to the filter body, so that the filter is readily manufacturable to exact electrical characteristics desired.
    Type: Grant
    Filed: January 5, 1989
    Date of Patent: February 13, 1990
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Masao Igarashi, Isao Akiyama, Kazuhiro Kumagai, Yoshinobu Takeda, Mamoru Yamaki, Yoshiaki Iguchi, Satoshi Kazama