Patents Assigned to Koyoh Corporation, Ltd.
  • Concrete product containing a mixture of microbial cells
    Patent number: 6989266
    Abstract: A cement paste containing microbial cells which has a sustained effect and an excellent function of purifying water. This cement paste contains a mixture of Bacillus subtilis, Bacillus thuringiensis and Bacillus sphaericus cells at a mixing ratio by mass of 0.1 to 50:0.1 to 50:0.1 to 50.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: January 24, 2006
    Assignee: Koyoh Corporation, Ltd.
    Inventors: Masayuki Koga, Yoko Koga