Patents by Inventor Kazuo Dairaku

Kazuo Dairaku 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 apparatus and batch-wise process for producing vinyl chloride resin
    Patent number: 5278262
    Abstract: In a process for the microsuspension of emulsion polymerization of vinyl chloride using a polymerization apparatus equipped with an agitator the improvement where the ratio (H/D) of the effective height (H) of the apparatus to the effective inner diameter (D) of the apparatus is 4 or more.
    Type: Grant
    Filed: May 19, 1992
    Date of Patent: January 11, 1994
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Tomishima, Kazuo Dairaku, Takekazu Maeda, Nobuki Toba, Hideyuki Kametani, Keizo Hayashi, Mitsumasa Hasegawa, Masahiro Tsujinaka
  • Polymerization apparatus having an effective height/effective inner diameter ratio of at least 4 and a circumferential agitative diameter/effective inner ratio diameter of from 0.7 to 0.9
    Patent number: 5169918
    Abstract: In a process for the microsuspension or emulsion polymerization of vinyl chloride using a polymerization apparatus equipped with an agitator the improvement where the ratio (H/D) of the effective height (H) of the apparatus to the effective inner diameter (D) of the apparatus is 4 or more.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: December 8, 1992
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Tomishima, Kazuo Dairaku, Takekazu Maeda, Nobuki Toba, Hideyuki Kametani, Keizo Hayashi, Mitsumasa Hasegawa, Masahiro Tsujinaka
  • Method for measuring a concentration of saccharides having a low molecular weight and sensor for measuring the same
    Patent number: 4865995
    Abstract: A method for measuring the concentration of low molecular weight saccharides in a liquid by placing the liquid in contact with one side of a membrane which allows saccharides to pass through, but not polysaccharides. A detecting liquid containing polysaccharides is placed in contact with the other side of the membrane. The detecting liquid is also in contact with a ligand which has a higher affinity for the saccharides than for the polysaccharides. The concentration of saccharides is calculated from the measured change in the concentration of polysaccharides in the detecting liquid. A sensor for measuring the concentration of low molecular weight saccharides based on the same method is also described.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: September 12, 1989
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventor: Kazuo Dairaku
  • Method and apparatus for measuring concentrations of gaseous or volatile substances in liquids
    Patent number: 4257257
    Abstract: A carrier gas is passed through a liquid-repellent porous partition tubing having channels extending through the wall of the tubing and immersed in the liquid to be tested, causing a gaseous or volatile substance to permeate through the wall and diffuse into the carrier gas in the tubing. The carrier gas flowing out from the outlet of the tubing and containing a quantity of the substance in equilibrium with the liquid phase is led to a detector connected to the outlet, whereby the concentration of the gaseous or volatile substance in the liquid can be detected continuously or intermittently with high efficiency. The tubing, which is liquid-repellent, prevents ingress of the liquid into the channels but permits the gaseous or volatile substance to diffuse into the carrier gas through a gas layer in the channels at an exceedingly high velocity, thus affording measurements with a short response time.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: March 24, 1981
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kazuo Dairaku, Kazuo Kuki