Patents by Inventor Shigeyuki Nagasato

Shigeyuki Nagasato 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).

  • Patent number: 9657176
    Abstract: A C.I. Pigment Yellow 74 as an insoluble azo pigment is provided. This C.I. Pigment Yellow 74 is crystalline particles. The ratio (26.6°/11.7°) of a diffraction intensity of a peak at 26.6° to a diffraction intensity of a peak at 11.7° in terms of Bragg angle (2?±0.2°) as measured by powder X-ray diffraction using CuK ?-radiation is 0.85 to 1.12, and the average primary particle size is 20 to 130 nm. The use of this C.I. Pigment Yellow 74 as a colorant in a coloring composition enables to provide the coloring composition with excellent dispersibility and good particle size stability and storage stability compared with conventional pigments. The use of this coloring composition enables the formation (recording) of images having excellent clarity and transparency of such high levels that have not been achievable by conventional technologies.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: May 23, 2017
    Assignee: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
    Inventors: Ryo Hoshino, Shigeyuki Nagasato, Masahiro Takayama, Shigeru Inoue, Satoru Matsuzaki
  • Publication number: 20140335358
    Abstract: A C.I. Pigment Yellow 74 as an insoluble azo pigment is provided. This C.I. Pigment Yellow 74 is crystalline particles. The ratio (26.6°/11.7°) of a diffraction intensity of a peak at 26.6° to a diffraction intensity of a peak at 11.7° in terms of Bragg angle (2?±0.2°) as measured by powder X-ray diffraction using CuK ?-radiation is 0.85 to 1.12, and the average primary particle size is 20 to 130 nm. The use of this C.I. Pigment Yellow 74 as a colorant in a coloring composition enables to provide the coloring composition with excellent dispersibility and good particle size stability and storage stability compared with conventional pigments. The use of this coloring composition enables the formation (recording) of images having excellent clarity and transparency of such high levels that have not been achievable by conventional technologies.
    Type: Application
    Filed: December 19, 2012
    Publication date: November 13, 2014
    Inventors: Ryo Hoshino, Shigeyuki Nagasato, Masahiro Takayama, Shigeru Inoue, Satoru Matsuzaki