Patents by Inventor Kayoko Fukushima

Kayoko Fukushima 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).

  • Organic pigment composition for color filters, method for producing the same, and color filter
    Patent number: 9908991
    Abstract: An organic pigment composition that allows a colored item to have good color saturation and high resistance to a change in hue even when subjected to a thermal history for a prolonged period. A color filter includes an organic pigment composition for color filters in a pixel portion. The organic pigment composition for color filters includes an organic pigment (A) having an average primary particle size of 100 nm or less; and a copolymer (B) of a (meth)acrylic acid ester having a phosphate group and another (meth)acrylic acid ester having no phosphate group, the amount of a nonvolatile component of the copolymer (B) being 0.1 to 15 parts relative to 100 parts of the organic pigment (A) on a mass basis.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: March 6, 2018
    Assignee: DIC CORPORATION
    Inventors: Masanori Fujimaki, Mayumi Tokuoka, Akira Kimura, Katsunori Shimada, Kayoko Fukushima, Masaharu Takahashi
  • ORGANIC PIGMENT COMPOSITION FOR COLOR FILTERS, METHOD FOR PRODUCING THE SAME, AND COLOR FILTER
    Publication number: 20150315361
    Abstract: Provided is an organic pigment composition that allows a colored item to have good color saturation and high resistance to a change in hue even when subjected to a thermal history for a prolonged period. A color filter includes an organic pigment composition for color filters in a pixel portion. The organic pigment composition for color filters includes an organic pigment (A) having an average primary particle size of 100 nm or less; and a copolymer (B) of a (meth)acrylic acid ester having a phosphate group and another (meth)acrylic acid ester having no phosphate group, the amount of a nonvolatile component of the copolymer (B) being 0.1 to 15 parts relative to 100 parts of the organic pigment (A) on a mass basis.
    Type: Application
    Filed: May 16, 2013
    Publication date: November 5, 2015
    Applicant: DIC CORPORATION
    Inventors: Masanori Fujimaki, Mayumi Tokuoka, Akira Kimura, Katsunori Shimada, Kayoko Fukushima, Masaharu Takahashi