Patents by Inventor Itsuo Katakuse

Itsuo Katakuse 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).

  • Semiconductor ion emitter for mass spectrometry
    Patent number: 4301369
    Abstract: A semiconductor ion emitter for a mass spectrometer, comprises an electrode having semiconductor whiskers provided on the conductive surface of a base. A process for manufacturing such semiconductor ion emitter, includes steps of evaporating gold onto a wire having a diameter of about 60 .mu.m, preheating the coated wire, and supplying a gas containing the semiconductor for growth of the whiskers on the gold plated wire. An apparatus for such process comprises a vacuum vessel for enclosing the wire, means for controllably heating the wire and means for controllably supplying a gas containing the semiconductor into the vacuum vessel.
    Type: Grant
    Filed: February 13, 1979
    Date of Patent: November 17, 1981
    Assignee: The President of Osaka University
    Inventors: Takekiyo Matsuo, Itsuo Katakuse, Hisashi Matsuda