Patents by Inventor Masayoshi Tsukanome

Masayoshi Tsukanome 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).

  • Metal scavengers for treating waste water
    Patent number: 5387365
    Abstract: Metal scavengers suitable for use in the treatment of waste water are disclosed. The metal scavengers individually comprise a polyamine derivative and a polyethyleneimine derivative. The polyamine derivative is formed of a polyamine having a molecular weight not higher than 500 and contains, per molecule of the polyamine, at least one dithiocarboxyl group or a salt thereof as an N-substituting group substituted for an active hydrogen atom of the polyamine such that at least 30% of suitable active hydrogen atoms contained in the polyamine are substituted by the dithiocarboxyl group or salt thereof.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: February 7, 1995
    Assignee: Miyoshi Yushi Kabushiki Kaisha
    Inventors: Masafumi Moriya, Kazuo Hosoda, Masatoshi Yoshida, Masayoshi Tsukanome
  • Process for the removal of heavy metals from contaminants
    Patent number: 5347071
    Abstract: A process for the treatment of contaminants using metal scavenger is disclosed. The metal scavengers individually comprise a polyamine derivative and a polyethyleneimine derivative. The polyamine derivative is formed of a polyamine having a molecular weight not higher than 500 and contains, per molecule of the polyamine, at least one dithiocarboxyl group or a salt thereof as an N-substituting group substituted for an active hydrogen atom of the polyamine. The polyethyleneimine derivative is formed from a polyethyleneimine having an average molecular weight of at least 5,000 and contains, per molecule of the polyethyleneimine, at least one dithiocarboxyl group or a salt thereof as an N-substituting group substituted for an active hydrogen atom of the polyethyleneimine.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: September 13, 1994
    Assignee: Miyoshi Yushi Kabushiki Kaisha
    Inventors: Masafumi Moriya, Kazuo Hosoda, Masatoshi Yoshida, Masayoshi Tsukanome