Patents by Inventor Koichi Yasukata

Koichi Yasukata 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).

  • Hollow fiber membranes with fusion-bonded end portions
    Patent number: 5066397
    Abstract: A filter element comprising porous hollow fiber filter membranes arranged in a lengthwise direction and fusion-bonded together at one or both of their respective end portions to form a unified terminal block which has through-holes communicating with the hollows of the remaining unbonded portions of the membranes and having diameters substantially the same as the inner diameters of the membranes. The filter element not only is excellent in resistance to heat and chemicals, but also can realize an efficient filtration.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: November 19, 1991
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshihiko Muto, Kohei Watanabe, Koichi Yasukata, Tomoyuki Sakurai
  • Hollow fiber membranes with fusion-bonded end portions
    Patent number: 4980060
    Abstract: A filter element comprising porous hollow fiber filter membranes arranged in a lengthwise direction and fusion-bonded together at one or both of their respective end portions to form a unified terminal block which has through-holes communicating with the hollows of the remaining unbonded portions of the membranes and having diameters substantially the same as the inner diameters of the membranes. The filter element not only is excellent in resistance to heat and chemicals, but also can realize an efficient filtration.
    Type: Grant
    Filed: July 12, 1988
    Date of Patent: December 25, 1990
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshihiko Muto, Kohei Watanabe, Koichi Yasukata, Tomoyuki Sakurai