Patents by Inventor Kozo Higuchi

Kozo Higuchi 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).

  • Process for the production of adsorbents of nitrohumic acid series with an improved alkali-resistance
    Patent number: 3994830
    Abstract: An adsorbent of nitrohumic acid series with an improved alkali-resistance is prepared by insolubilizing calcium nitrohumate, kneading the insolubilized product with a water-soluble polyacrylamide in the presence of water, shaping the mixture into a desired form and then subjecting it to a heat treatment followed by an acid treatment. The adsorbent thus obtained can effectively be used for removing heavy metals from an alkaline effluent without causing any deterioration of adsorptive quality and coloration of the effluent.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: November 30, 1976
    Assignees: Agency of Industrial Science & Technology, Hokutan Chemical Industry Co. Ltd.
    Inventors: Kazuki Terajima, Shigeru Tomita, Yoshindo Matsuda, Keiji Abe, Kozo Higuchi, Keigo Iwashita, Nobuyuki Nishiyama, Yasuo Kato