Patents by Inventor Jitsuo Kuroawa

Jitsuo Kuroawa 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 gas phase polymerization and method for operating the same
    Patent number: 5380494
    Abstract: A fluidized bed-type polymerization apparatus has an upper blowing equipment installed at a definite height in the fluidized bed area. Through the equipment, a part of the circulating gas and a part, or the whole, of the fresh feed material is blown, thereby to prevent the formation of lumps of polymer in the fluidized bed portion, owing to improved intermixing at the upper portion of the fluidized bed, as well as efficient heat-removal at that portion.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: January 10, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hiroyuki Ogawa, Hideo Kusakabe, Ikuhiro Tamaru, Yoshizumi Sasaki, Jitsuo Kuroawa