Patents by Inventor Isao NOUCHI

Isao NOUCHI 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 analyzing metal component and method of manufacturing purified polymer product
    Patent number: 11933706
    Abstract: A method of analyzing a metal component contained as an impurity in a polymer composition that contains a polymer and an organic solvent including a step (i) of preparing a dispersion by mixing the polymer composition with an acid aqueous solution, a step (ii) of separating the dispersion prepared in the step (i) into a dispersoid layer containing the polymer and a dispersion medium layer containing the metal component, and a step (iii) of quantifying the metal component contained in the dispersion medium layer separated in the step (ii).
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: March 19, 2024
    Assignee: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Kohei Suzuki, Isao Nouchi, Toshio Nomura
  • METHOD OF ANALYZING METAL COMPONENT AND METHOD OF MANUFACTURING PURIFIED POLYMER PRODUCT
    Publication number: 20210310911
    Abstract: A method of analyzing a metal component contained as an impurity in a polymer composition that contains a polymer and an organic solvent including a step (i) of preparing a dispersion by mixing the polymer composition with an acid aqueous solution, a step (ii) of separating the dispersion prepared in the step (i) into a dispersoid layer containing the polymer and a dispersion medium layer containing the metal component, and a step (iii) of quantifying the metal component contained in the dispersion medium layer separated in the step (ii).
    Type: Application
    Filed: March 29, 2021
    Publication date: October 7, 2021
    Applicant: TOKYO OHKA KOGYO CO., LTD.
    Inventors: Kohei SUZUKI, Isao NOUCHI, Toshio NOMURA