Patents by Inventor Tadashi Tomikura

Tadashi Tomikura 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).

  • Maltooligoside derivative, reagent for determining .alpha.-amylase activity containing the same as effective ingredient and a process for determining the .alpha.-amylase activity using same
    Patent number: 5302514
    Abstract: The present invention provides a maltooligoside derivative represented by the formula: ##STR1## wherein n denotes an integer 3-5, R represents an aromatic chromophoric group, X represents a group >CHCH.sub.2 N.sub.3 or >C.dbd.CH.sub.2, and Y represents a hydrogen atom, a substituted or unsubstituted hydrocarbon group or an alkyl- or arylsulfonyl group, a reagent for determining .alpha.-amylase activity which comprises said maltooligoside derivative as an effective ingredient, and a process for determining .alpha.-amylase activity, characterized in that said maltooligoside derivative and coupled enzymes are added to an .alpha.-amylase containing sample to conduct an enzymatic reaction and a liberated aromatic chromophoric compound is quantitatively determined. The compound of the present invention is very useful as a substrate for determining .alpha.-amylase activity, and .alpha.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: April 12, 1994
    Assignees: Kikkoman Corporation, Daiichi Pure Chemicals Co. Ltd., Seishin Pharmaceutical Co., Ltd.
    Inventors: Shoichi Tokutake, Tadashi Tomikura, Kazuo Kotani, Kazunori Saito, Kohichiro Tobe