Patents by Inventor Takashi Nakauma

Takashi Nakauma 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).

  • Polymerization in a tubular reactive using an abrading element to remove scale adhesion
    Patent number: 5453470
    Abstract: Continuous polymerization method using a tubular continuous polymerization apparatus, wherein a peg 1 for tube cleaning is passed through a polymerization solution in polymerization tube 6 while contacting with the inner wall of the tube during the polymerization. The apparatus used in the method is equipped with polymerization tube 6; a first raw material inlet tube 8 connected with polymerization tube 6; a peg inlet tube 4 connected with polymerization tube 6; a second raw material inlet tube 10 connecting tube 8 with tube 4; valve 5 for opening and shutting between polymerization tube 6 and tube 8; valve 3 for opening and shutting between tube 10 and tube 4; and valve 7 for opening and shutting a connection between the tube 8 and tube 10.
    Type: Grant
    Filed: July 6, 1994
    Date of Patent: September 26, 1995
    Assignee: Showa Highpolymer Co., Ltd.
    Inventors: Juichi Kasai, Yasuo Kaneko, Takashi Nakauma, Yutaka Toukai