Patents by Inventor Kyoko Ohwaki

Kyoko Ohwaki 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).

  • Ink composition for detecting hydrogen peroxide and indicator for detection of hydrogen peroxide
    Patent number: 10195301
    Abstract: A primary object of the present invention is to provide a hydrogen peroxide gas detection indicator which allows more certain visual recognition of color changing according to the concentration of hydrogen peroxide gas. The structure of this invention relates to an ink composition for detecting hydrogen peroxide gas containing (1) at least one of styrene acrylic resins and styrene-maleic acid resins and (2) a methine dye. According to this invention, a color-changing layer is formed using the ink composition for detecting hydrogen peroxide gas, allowing color changing according to the concentration of hydrogen peroxide gas to be visually recognized.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: February 5, 2019
    Assignee: SAKURA COLOR PRODUCTS CORPORATION
    Inventors: Norihiro Yamaguchi, Kyoko Ohwaki