Patents by Inventor Emiko Minowa

Emiko Minowa 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).

  • Aluminium and aluminium alloy having corrosion-resistant protective layer, and methods of making such a layer
    Patent number: 5055356
    Abstract: A body, particularly a thin layer, of aluminium or aluminium alloy is given a corrosion-resistant bright dense barrier-type protective layer. The layer has a thickness in the range 50 to 500 nm and comprises aluminium oxide and a chelate complex of aluminium and at least one organic chelating compound. The layer is formed by contacting the surface with a solution of the chelating compound of pH 2 to 7 and, optionally, performing oxidative electrolysis.
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: October 8, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Emiko Minowa, Shiro Kobayashi, Masahiko Itoh