Patents by Inventor Tamiko Takahashi

Tamiko Takahashi 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).

  • Crystalline L-carnosine zinc complex having antiulcer activity
    Patent number: 4981846
    Abstract: A novel crystalline L-carnosine zinc complex is produced by reacting L-carnosine, a zinc salt and an alkali metal compound in an anhydrous or hydrous polar organic solvent.The crystalline L-carnosine zinc complex substantially corresponds to the formula C.sub.9 H.sub.12 N.sub.4 O.sub.3 Zn and has physical properties clearly different from the known amorphous L-carnosine zinc complex.As compared with the amorphous complex, the crystalline complex is very low in impurity, stable to heat and moisture, and easy to filtrate, and has higher anti-ulcer activity.
    Type: Grant
    Filed: July 20, 1988
    Date of Patent: January 1, 1991
    Assignee: Hamari Chemicals, Ltd.
    Inventors: Takefumi Matsukura, Tamiko Takahashi, Yasuhiro Nishimura, Masahiro Takaya, Hajime Fujimura