Patents Examined by Marcheschi
  • Method of treating fly ash and fly ash cement
    Patent number: 5286292
    Abstract: Commercially available fly ash is prepared and charged in a vessel. A halogen gas is supplied to the vessel and is brought into contact with the fly ash in the vessel.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: February 15, 1994
    Assignee: Onoda Cement Co., Ltd.
    Inventors: Kazuhisa Tsukada, Takeshi Kuroda, Takane Mukaino, Yukinori Saiki