Patents by Inventor Kouichi Ban

Kouichi Ban 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).

  • Heavy metal-binding agent process
    Patent number: 4039446
    Abstract: A novel heavy metal-binding agent is obtained by reacting a resin containing in its molecular chain --NH--, --NH.sub.2, or both thereof with carbon disulfide and, if necessary, treating the reaction product thus obtained with a base. As compared with conventionally known metal-binding agents, the present metal-binding agent can remove heavy metals more effectively from solutions or gases containing these metals even in a range of extremely low concentrations, and, hence, is useful for pollution control.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: August 2, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kouichi Ban, Yasumiti Namba, Yukihiro Sekine, Masaaki Matsuda