Patents by Inventor Giichi Sudoh

Giichi Sudoh 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).

  • Process for producing hydraulic cements
    Patent number: 4404031
    Abstract: A calcium sulfoaluminate clinker having a calcium sulfoaluminate compound 3CaO.3Al.sub.2 O.sub.3. CaSO.sub.4 as a main component, a Portland cement and a blast furnace granulated slag are mixed to produce cements which prevent the formation of efflorescence.
    Type: Grant
    Filed: January 4, 1982
    Date of Patent: September 13, 1983
    Assignee: Chichibu Cement Kabushikikaisha
    Inventors: Giichi Sudoh, Keiichi Minegishi, Kanjiro Ishizaki, Ikuo Uchida
  • Humidity sensor element
    Patent number: 4344062
    Abstract: A humidity sensor element comprising a metal oxide semiconductor sintered member having a composition composed of TiO.sub.2 and V.sub.2 O.sub.5, the member being formed with a pair of electrodes. When the element is used at a temperature of less than 400.degree. C., it is possible to detect the humidity as a variation of electric resistance.
    Type: Grant
    Filed: June 3, 1980
    Date of Patent: August 10, 1982
    Assignee: Chichibu Cement Co., Ltd.
    Inventors: Giichi Sudoh, Keiichi Minegishi, Tokuji Akiba, Tadao Kato, Norio Ogawa