Patents by Inventor Takeshi Arashima

Takeshi Arashima 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).

  • Agents for and method of reducing the fluidity drop of hydraulic cement compositions and method of producing such agents
    Patent number: 5919881
    Abstract: Water-soluble vinyl copolymers with number average molecular weight 500-20000, having two specified repetition units at a specified molar ratio and a specified end group can serve as an effective agent for reducing a drop in the fluidity of hydraulic cement compositions.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: July 6, 1999
    Assignee: Takemoto Yushi Kabushiki Kaisha
    Inventors: Mitsuo Kinoshita, Yoshimasa Miura, Takeshi Arashima, Tomoo Takahashi, Kazuhide Saito
  • Cement dispersion agents
    Patent number: 5362829
    Abstract: Cement dispersion agents composed of water-soluble vinyl copolymers obtained by aqueous solution radical polymerization of five specified kinds of monomers at a ratio within a specified range can provide improved fluidity to high-strength hardened concrete and mortar with extremely low water-to-cement ratio.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: November 8, 1994
    Assignee: Takemoto Yushi Kabushiki Kaisha
    Inventors: Mitsuo Kinoshita, Yoshimasa Miura, Takeshi Arashima