Patents by Inventor Hisatsugu Nakaya

Hisatsugu Nakaya 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 for manufacturing aluminum foils used as electrolytic capacitor electrodes
    Patent number: 5417839
    Abstract: Aluminum foils used as a material of electrodes in electrolytic capacitors are manufactured by a method which comprises a step of forming at first an initial internal oxide coating 5 to 50 .ANG. thick on the surface of the aluminum foils before they are electrochemically or chemically etched later. The aluminum foils are then subjected to high temperature heat treatment such that the whole thickness of the oxide coating does not exceed 70 .ANG..
    Type: Grant
    Filed: August 9, 1994
    Date of Patent: May 23, 1995
    Assignee: Showa Aluminum Corporation
    Inventors: Masashi Sakaguchi, Tadao Fujihira, Kiyoshi Tada, Hisatsugu Nakaya, Shozo Umetsu, Takashi Tamura