Patents by Inventor Tadashi Yamasaki

Tadashi Yamasaki 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 for producing porous aluminum anode element
    Patent number: 4140599
    Abstract: A porous aluminum anode element having an increased effective surface area is prepared by an electrolytic etching process using an etchant solution containing CrO.sub.4 .sup.-- in a higher concentration and a lower current density than those heretofore proposed. Currents of a digital signal type, such as a pulse current, or those of triangular, sawtooth, trapezoidal or staircase waveform, are preferred.
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: February 20, 1979
    Assignee: Fujitsu Limited
    Inventors: Tadashi Yamasaki, Kentaro Hirata