Patents by Inventor Yoko Sumida

Yoko Sumida 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 the supercritical extraction and separation of solid samples
    Patent number: 5178735
    Abstract: A method of extracting and separating substances contained in a solid sample, especially from ginkgo leaves, which comprises introducing a supercritical fluid into a dispersion in which the solid sample is dispersed, separating the supercritical fluid containing dissolved substances to be extracted.
    Type: Grant
    Filed: December 28, 1989
    Date of Patent: January 12, 1993
    Assignee: Chlorine Engineers
    Inventors: Akiyoshi Manabe, Tetsuro Yamashita, Katsuhisa Harada, Tsuneo Tokumori, Yoko Sumida