Patents by Inventor Shusuke Harada

Shusuke Harada 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).

  • Apparatus for producing spheroidal inorganic particulate material
    Patent number: 5253991
    Abstract: The present invention is directed to a spheroidal particulate inorganic material of an inorganic particulate material such as spheroidal cement or slag whose respective particles are of a substantially spheroidal shape and have smooth surfaces having improved flowability and filling properties. The spheroidal particulate material is produced by subjecting the respective particles of the particulate inorganic material to a high temperature flame treatment and rapid cooling in air, or by dispersing fine particles of the inorganic material and an organic or inorganic binder in a non-aqueous solvent to form a slurry and granulating the slurry. Compositions containing the spheroidal particulate inorganic material are used in civil engineering works and construction.
    Type: Grant
    Filed: September 4, 1991
    Date of Patent: October 19, 1993
    Assignee: Sumitomo Cement Co., Ltd.
    Inventors: Norio Yokota, Takahiko Yoshimura, Shusuke Harada, Masatoshi Onodera, Akihiko Miyauchi