Patents by Inventor Taeko Soma

Taeko Soma 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).

  • Use of phenol derivative in colorimetric analysis of metal ions
    Patent number: 5376552
    Abstract: A phenol derivative obtained by reacting a carboxylic acid anhydride with a phenol compound, followed by condensation with iminodiacetic acid and formaldehyde, or a salt thereof is effective as an agent for adjusting color forming sensitivity in a colorimetric analysis of metal ions in a fluid such as a living body fluid.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: December 27, 1994
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Kuniaki Tokuda, Taeko Soma, Naoki Teno