Patents Assigned to Hokkaido
  • Patent number: 6835322
    Abstract: A composition for a snow- or ice-accretion inhibiting member which has a static friction coefficient of less than 1.3 relative to snow having a temperature range of 0 to −10° C. The composition of the present invention can show not only a good snow- or ice-accretion inhabiting property upon snowfall but also an improved snow slipping-off property upon temperature rise.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: December 28, 2004
    Assignee: Hokkaido
    Inventors: Mitsunori Yoshida, Katsuo Kobayashi, Takeshi Sawai
  • Patent number: 5585319
    Abstract: A process for preparing an oil sorbent excellent in oil sorptivity and water repellency and a device preparing the same are disclosed. The process for preparing an oil sorbent comprises mechanically fibrillating, or shredding and grinding lignocellulose material while substantially maintaining cell structure; and heating the resultant at a temperature of 250 to 450.degree. C. or 350 to 400.degree. C. for a predetermined period of time; followed by predetermined cooling to form an oil sorbent. The device for continuously preparing an oil sorbent having such a basic structure that three pipes with a "ellipse-shaped" cross-section each of which includes therein a screw type transferring means are arranged on top of one another, and the heating and the cooling are effected externally.
    Type: Grant
    Filed: February 8, 1994
    Date of Patent: December 17, 1996
    Assignee: Hokkaido
    Inventors: Masaru Saitoh, Katsuo Umehara, Nobuya Minemura, Fumito Nakamura, Yukihiro Kato, Hiromu Endoh