Patents by Inventor Sadao Iida

Sadao Iida 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).

  • Chemical dissolving solution for metals
    Patent number: 4459216
    Abstract: An aqueous acidic chemical dissolving solution comprising hydrogen peroxide, an inorganic acid and a specific aromatic compound is applicable to etching, pickling and surface treatment of various kinds of metals with a good stabilization effect and a good life, giving a metal surface with good luster.
    Type: Grant
    Filed: May 6, 1983
    Date of Patent: July 10, 1984
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Toshihiro Nakazato, Itaru Ikeya, Sadao Iida, Toshihiko Yamazaki, Yutaka Oshida