Patents by Inventor Sakae Higashidate

Sakae Higashidate 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).

  • No radical measuring method and apparatus
    Patent number: 5424216
    Abstract: An NO radical measuring method comprising the steps of mixing a test sample solution containing NO radicals with hydrogen peroxide or an analogous substance thereto and luminol or an analogous substance thereto, and measuring the intensity of chemiluminescence. The method enables a trace amount of NO radical to be measured with accuracy and in real time. An apparatus used for this method is also disclosed.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: June 13, 1995
    Assignees: Jasco Corporation, Masaaki Hirobe
    Inventors: Tetsuo Nagano, Kazuya Kikuchi, Masaaki Hirobe, Hiroshi Hayakawa, Yasunobu Hirata, Tsuneaki Sugimoto, Sakae Higashidate
  • Extraction and separation method and apparatus using supercritical fluid
    Patent number: 5013443
    Abstract: Extraction and separation method and apparatus using a supercritical fluid for extracting a specified component from a sample by a supercritical fluid and introducing the supercritical fluid containing the extracted component into a silica gel column coated with silver nitrate so as to separate the extracted component.By the combination of the extracting operation by a supercritical fluid under mild conditions and chromatography taking the advantage of the selectivity of the silica gel column coated with silver nitrate to olefins, the extract is obtained at a high concentration without producing denaturation.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: May 7, 1991
    Assignee: Nihon Bunko Kogyo Kabushiki Kaisha
    Inventors: Sakae Higashidate, Yoshio Yamauchi, Muneo Saito