Patents by Inventor Motoi Shitaka

Motoi Shitaka 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).

  • Monoazo lake pigment composition and gravure ink using the same
    Patent number: 6989055
    Abstract: A monoazo lake pigment composition containing a monoazo lake pigment obtained from a laked pigment aqueous slurry prepared by conducting coupling of a diazo component obtained by diazotizing an aromatic amine having a soluble group and a coupler component and conducting laking after or simultaneously with the coupling, wherein the laking is carried out in the presence of a water-soluble acrylic polymer in an amount of 0.1 to 40 parts by weight per 100 parts of the above coupler component, and a gravure ink containing the above pigment composition and a gravure ink vehicle.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: January 24, 2006
    Assignee: Toyo Ink Mfg. Co., Ltd.
    Inventors: Kenji Kitamura, Shigeki Kato, Hitoshi Maki, Shoko Goto, Motoi Shitaka, Osamu Shiromaru
  • Monoazo lake pigment composition and gravure ink using the same
    Publication number: 20040025748
    Abstract: A monoazo lake pigment composition containing a monoazo lake pigment obtained from a laked pigment aqueous slurry prepared by conducting coupling of a diazo component obtained by diazotizing an aromatic amine having a soluble group and a coupler component and conducting laking after or simultaneously with the coupling, wherein the laking is carried out in the presence of a water-soluble acrylic polymer in an amount of 0.1 to 40 parts by weight per 100 parts of the above coupler component, and a gravure ink containing the above pigment composition and a gravure ink vehicle.
    Type: Application
    Filed: August 6, 2003
    Publication date: February 12, 2004
    Inventors: Kenji Kitamura, Shigeki Kato, Hitoshi Maki, Shoko Goto, Motoi Shitaka, Osamu Shiromaru