Patents by Inventor Shinji Hirota

Shinji Hirota 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).

  • Water absorbent, comprising magnetic material and water absorbent resin
    Patent number: 5298179
    Abstract: There is provided a water absorbent comprising a magnetic material and a highly water-absorbable resin. Said water absorbent is contacted with a moisture-containing powder and the water absorbent that has absorbed the moisture is then separated from the powder by means of a magnet, whereby the moisture content of the moisture-containing powder can be decreased. Said water absorbent is produced by forming a mixture composed of the highly water-absorbable resin, water and the magnetic material and then drying said mixture.
    Type: Grant
    Filed: July 3, 1991
    Date of Patent: March 29, 1994
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Keizo Ukita, Shinji Hirota, Masaaki Inoue