Patents by Inventor Kazutoshi Kiyokawa

Kazutoshi Kiyokawa 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: 20090081472
    Abstract: One embodiment of this invention is an anti-reflection (AR) film including a transparent substrate film; a hard coat layer; and an AR layer produced by a dry coating technique, wherein the hard coat layer and the AR layer are formed on at least one side of the transparent substrate film, and a strain, at which the AR film cracks when stretched at a constant rate of 1 mm/min. or less, is in the range 0.65-1.10%.
    Type: Application
    Filed: September 18, 2008
    Publication date: March 26, 2009
    Applicant: Toppan Printing Co., Ltd.
    Inventors: Yuki Watanabe, Kazutoshi Kiyokawa, Jyunko Awa, Yasunori Kurauchi
  • Publication number: 20090052041
    Abstract: An anti-reflection (AR) film has a transparent substrate film; a hard coat layer which is formed on one surface of the transparent substrate film; and an AR layer which is formed on the hard coat layer. And the AR layer has a four-layer stacked structure of alternate high and low refractive index material layers; the total thickness of the low refractive index material layer is in the range 90-130 nm; and the arithmetic mean roughness Ra of the AR layer surface is in the range 1.5-3.0 nm.
    Type: Application
    Filed: August 18, 2008
    Publication date: February 26, 2009
    Applicant: Toppan Printing, Co., Ltd.
    Inventors: Yuki Watanabe, Kazutoshi Kiyokawa, Jyunko Awa, Yasunori Kurauchi
  • Publication number: 20080261008
    Abstract: An anti-reflection film, including: a transparent base film; and an anti-reflection stacked member provided on the hard coating, having, in alternation, a high-refractivity oxide thin film layer and a low-refractivity oxide thin film layer, wherein: an outermost layer of the anti-reflection stacked member is the low-refractivity oxide thin film layer; the low-refractivity oxide thin film layer is a silicon oxide thin film; a thickness of the silicon oxide thin film is in a range of 75 nm or greater, and 100 nm or smaller; the silicon oxide thin film has a first layer on a side of the transparent base film, and a second layer on an outside of the first layer; and a composition ratio Si/O (A) of silicon to oxygen in the first layer and a composition ratio Si/O (B) of silicon to oxygen in the second layer satisfies a relationship, Si/O (A)>Si/O (B).
    Type: Application
    Filed: April 16, 2008
    Publication date: October 23, 2008
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Kazutoshi Kiyokawa, Yuki Watanabe, Takayuki Tani, Yasunori Kurauchi