Patents by Inventor Eiji Niki

Eiji Niki 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).

  • Ion selective field-effect sensor
    Patent number: 4352726
    Abstract: An ion selective field-effect sensor selectively sensitive to a particular cation to be measured is disclosed. In the sensor is used a giant heterocyclic compound selectively forming a complex with the particular cation as an ion sensitive film provided on a surface of a field-effect semiconductor device.
    Type: Grant
    Filed: October 28, 1980
    Date of Patent: October 5, 1982
    Assignee: Takashi Mukaibo
    Inventors: Takuo Sugano, Eiji Niki, Yoichi Okabe, Tatsuo Akiyama