Patents by Inventor Kazuhisa Tsukada

Kazuhisa Tsukada 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 dispersant for powdery hydraulic composition
    Patent number: 6437027
    Abstract: The present invention relates to a process for producing a powdery dispersant for preparing hydraulic compositions, which process includes adding an reducing agent to a solution predominantly containing a polycarboxylate polymer compound having a polyalkylene glycol chain, drying the resultant mixture, and pulverizing the dried product; the resultant powdery dispersant for preparing hydraulic compositions; and a hydraulic composition containing the dispersant. According to the present invention, there can be provided a powdery dispersant for preparing a hydraulic composition, which has excellent fluidity and dispersibility. The dispersant can be added to cement in advance.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: August 20, 2002
    Assignee: Taiheiyo Cement Corporation
    Inventors: Hirotaka Isomura, Hiroshi Hayashi, Kazuhisa Tsukada, Koichi Soeda, Kenjiro Makino, Masaki Takimoto
  • 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