Patents by Inventor Hiroyuki Oominato

Hiroyuki Oominato 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 FOR PRODUCING AQUEOUS PIGMENT DISPERSION
    Publication number: 20210387149
    Abstract: The problem to be solved by the present invention is to provide a method for producing an aqueous pigment dispersion that has certain dispersion stability with which the formation of coarse particles with time and the settling of a pigment and the like with time can be reduced and that can be used for producing an ink having excellent discharge stability. The present invention relates to a method for producing an aqueous pigment dispersion, the method including kneading a composition including a pigment including one or more materials selected from the group consisting of a violet pigment, a green pigment, and an orange pigment and a resin, the composition having a nonvolatile content of 50% by mass or more, under predetermined conditions and subsequently performing a centrifugation treatment.
    Type: Application
    Filed: November 7, 2019
    Publication date: December 16, 2021
    Applicant: DIC Corporation
    Inventors: Kohei Hayakawa, Kenji Sugo, Yoshihiro Sato, Yutaro Ueda, Hiroyuki Oominato, Shinichi Okada