Patents by Inventor Kazuya Yanagisawa

Kazuya Yanagisawa 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 measuring endotoxin and apparatus used therefor
    Patent number: 4740460
    Abstract: Endotoxin contents in samples can be determined qualitatively, or quantitatively, singly or in parallel, with high precision in a short time by a process comprising applying a light to each sample solution, measuring an initial transmitted light amount I.sub.0 and a transmitted light amount at a time t, I(t), to give a ratio R(t)=I(t)/I.sub.0, and judging a gelation point by a threshold value of R(t), or further obtaining a gelation time from the gelation point. An apparatus used therefor is also disclosed.
    Type: Grant
    Filed: June 26, 1985
    Date of Patent: April 26, 1988
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Yoshitsugu Sakata, Haruki Oishi, Yasumichi Hatayama, Hiromi Shiraishi, Kazuya Yanagisawa