Patents by Inventor Tatsuo Maruo

Tatsuo Maruo 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 transporting, storing, and producing a particulate water-absorbent resin
    Patent number: 6817557
    Abstract: The present invention provides: a process for treating a particulate water-absorbent resin, which enables to carry out pulverization stably in a process for producing a particulate water-absorbent resin, and transportation or storage of the particulate water-absorbent resin stably during or after producing the particulate water-absorbent resin, and to prevent contamination of cohered matters of the particulate water-absorbent resin; and involves no or little deterioration of properties. The process for treating a particulate water-absorbent resin is characterized by carrying out at least one selected from the group consisting of: (1) heating at least one portion of a surface getting contact with the particulate water-absorbent resin from the outside, (2) maintaining the temperature of at least one portion of a surface getting contact with the particulate water-absorbent resin at 30 to 150° C.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: November 16, 2004
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Hiroyuki Kakita, Tatsuo Maruo, Takumi Hatsuda, Yoshio Irie
  • Process for transporting, storing, and producing a particulate water-absorbent resin
    Publication number: 20010011123
    Abstract: The present invention provides: a process for treating a particulate water-absorbent resin, which enables to carry out pulverization stably in a process for producing a particulate water-absorbent resin, and transportation or storage of the particulate water-absorbent resin stably during or after producing the particulate water-absorbent resin, and to prevent contamination of cohered matters of the particulate water-absorbent resin; and involves no or little deterioration of properties. The process for treating a particulate water-absorbent resin is characterized by carrying out at least one selected from the group consisting of: (1) heating at least one portion of a surface getting contact with the particulate water-absorbent resin from the outside, (2) maintaining the temperature of at least one portion of a surface getting contact with the particulate water-absorbent resin at 30 to 150° C.
    Type: Application
    Filed: January 4, 2001
    Publication date: August 2, 2001
    Inventors: Hiroyuki Kakita, Tatsuo Maruo, Takumi Hatsuda, Yoshio Irie
  • Process for classifying particulate hydrophilic polymer and sieving device
    Patent number: 6164455
    Abstract: The present invention provides a process for classifying a particulate hydrophilic polymer and a sieving device, which can carry out a classification in a small separation particle diameter with high efficiency and exhibit classification ability inherent in the sieving device. The process comprises the step of classifying a particulate hydrophilic polymer in dry particle size with a sieving device, wherein the sieving device is used in a heated and/or thermally insulated state. The sieving device comprises a thermally insulating means.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: December 26, 2000
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Hiroyuki Kakita, Tatsuo Maruo, Sumio Okuda, Takumi Hatsuda