Patents by Inventor Masaki Sazawa

Masaki Sazawa 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).

  • Freeze-preventing material and method for preventing pavement surface from freezing
    Patent number: 6126850
    Abstract: A freeze-preventing material comprises cement, salt, and water-absorbing resins. The freeze-preventing material is scattered on the pavement surface in the form of slurry to prevent the pavement surface from freezing. Thereby a freeze-preventing effect is maintained for a long period of time owing to the water-absorbing resins which absorb and retain the salt in large amounts. The anti-freezing effect can be restored by spraying the pavement with the salt again.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: October 3, 2000
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Nobuya Ishioka, Tetsuhiko Yamaguchi, Masaki Sazawa, Kenichi Kitamura