Patents by Inventor Yuya ICHIHARA

Yuya ICHIHARA 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).

  • Publication number: 20160053081
    Abstract: Provided is a pigment combination exhibiting excellent electrical properties including electrical insulating properties and environmental safety, and having a hue close to that of carbon black and giving a high coloring strength. The invention provides a pigment composition containing a plurality of organic pigments P1 and P2 as essential components and optionally further containing a third pigment P3, wherein the first pigment P1 is at least one phthalocyanine pigment, the second pigment P2 is at least one pigment selected from perylene pigments, azo pigments, perinone pigments, quinacridone pigments, and anthraquinone pigments, and each of the organic pigments P1, P2, and P3 is a pigment which contains no halogen in its molecular structure.
    Type: Application
    Filed: March 25, 2014
    Publication date: February 25, 2016
    Applicant: CLARIANT INTERNATIONAL LTD.
    Inventors: Daisuke HARADA, Yuya ICHIHARA
  • Publication number: 20150376412
    Abstract: The invention provides a black pigment composition capable of overcoming the drawbacks of carbon black pigments, which, when used as a toner colorant in particular, is able to reduce color shading over time and improve image qualities through an improvement in charging performances such as charge leakage and the like. The invention also provides a chromatic pigment composition able to reduce and correct the tinge of a carbon black pigment while improving fading stability, when the composition is added to a carbon black composition for electrophotographic toners. The black pigment composition contains, as essential pigments, a pigment P1 having a maximum absorption wavelength ?max (nm) within the range of 460??max?530 and a half-value wavelength (long wavelength side) of the absorption spectrum of 550 nm or more, and a pigment P2 having a maximum absorption wavelength ?max (nm) within the range of 600??max?700, as measured in the form of a dispersion in a solvent (methyl ethyl ketone).
    Type: Application
    Filed: January 25, 2014
    Publication date: December 31, 2015
    Applicant: CLARIANT INTERNATIONAL LTD.
    Inventors: Daisuke HARADA, Yuya ICHIHARA