Patents by Inventor Minoru Sugai

Minoru Sugai 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 of adsorbing heavy metals
    Patent number: 3969244
    Abstract: Particulate polycondensates of thiourea, thiosemicarbazide, or thiocarbazide with aldehydes and phenolic or amine constituents adsorb heavy metals from aqueous solutions of their compounds, also mercury from its vapors.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: July 13, 1976
    Assignees: Hokuetsu Carbon Industry Co., Ltd, Yoshitaka Kobayashi
    Inventors: Yoshitaka Kobayashi, Kinjiro Sugai, deceased, by Katsuno Suqai, legal successor, by Hajime Sugai, legal successor, by Minoru Sugai, legal successor, by Shunji Sugai, legal successor, by Hiroshi Sugai, legal successor, Minoru Sugai