Patents by Inventor Keizi Masada

Keizi Masada 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 of phosphating an iron substrate in a closed system using aromatic nitro compound accelerators
    Patent number: 4181539
    Abstract: A process for iron phosphating the surface of an iron substrate which comprises treating said surface with a phosphating solution comprising at least one of alkali metal and ammonium phosphates and at least one of aromatic nitro compounds as a phosphating accelerator in an aqueous medium and having a pH of about 3 to 6.5 in a closed system phosphating installation.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: January 1, 1980
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Ryoichi Murakami, Yukio Anegawa, Minoru Ishida, Keizi Masada