Patents by Inventor Sakae Shoji

Sakae Shoji 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).

  • Method for selectively capturing metal ions
    Patent number: 4054516
    Abstract: A method for selectively capturing metal ions by treating a solution conting ions of heavy metals, such as cupric ions, zinc ions, etc., at an adjusted pH value with a metal capturing agent comprising a condensation product of a higher fatty acid or derivative thereof with an excess of a polyamine, for example, a condensation product of decanoic acid and a polyamine. Heavy metal ions contained in effluents from mines and factories are selectively captured and separated according to this method.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: October 18, 1977
    Assignee: Director-General of the Agency of Industrial Science and Technology
    Inventors: Gaku Izumi, Makoto Sato, Sakae Shoji