Patents by Inventor Toru Naraki

Toru Naraki 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).

  • Method of determination of pivka
    Patent number: 5516640
    Abstract: To provide a simple immunochemical assay of a PIVKA of every kind (PIVKA-VII, -IX, -X, -C, -S or -Z: protein induced by vitamin K absence) corresponding to a vitamin K-dependent protein. It has been confirmed that a PIVKA of every kind can be determined according to the double antibody sandwich method wherein use is made of a solid-supported anti-PIVKA-II monoclonal antibody. There is also disclosed a reagent for determination of a PIVKA of every kind according to the above-mentioned method.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: May 14, 1996
    Assignee: Eisai Co., Ltd.
    Inventors: Keisuke Watanabe, Toru Naraki, Yoshihiro Iwasaki