Patents by Inventor Kiyotaka Takematsu

Kiyotaka Takematsu 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: 20200025458
    Abstract: A liquid flow path portion of a vapor chamber according to this invention includes a first main flow groove, a second main flow groove and a third main flow groove. A first convex array including a plurality of first convex portions arranged via a first communicating groove is provided between the first main flow groove and the second main flow groove. A second convex array including a plurality of second convex portions arranged via a second communicating groove is provided between the second main flow groove and the third main flow groove. The main flow groove includes a first intersection at which at least a part of the first communicating groove faces each second convex portion and a second intersection at which at least a part of the second communicating groove faces each first convex portion.
    Type: Application
    Filed: February 23, 2018
    Publication date: January 23, 2020
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Shinichiro TAKAHASHI, Kenro HIRATA, Takayuki OTA, Taizo HASHIMOTO, Kiyotaka TAKEMATSU
  • Patent number: 6476969
    Abstract: An antireflection film containing a transparent substrate film, a hard coat layer on the substrate film, and first and second refractive index layers on the hard coat layer. The hard coat layer has a refractive index higher than the refractive index of the transparent substrate film; the first refractive index layer has a refractive index higher than the refractive index of the hard coat layer; the second refractive index layer has a refractive index lower than the refractive index of the hard coat layer.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: November 5, 2002
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematsu, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri, Hiroshi Yamada, Toshio Yoshihara
  • Publication number: 20020051295
    Abstract: The present invention provides a transparent functional film comprising a transparent plastic substrate film and a hard coat layer provided thereon, wherein functional ultrafine particles are present in a highly localized form, thereby enabling the functional ultrafine particles to effectively exhibit their function and, at the same time, the hard coat layer to have a good adhesion to the functional ultrafine particle layer; and also an antireflection film and processes for producing the transparent functional film and the antireflection film.
    Type: Application
    Filed: September 12, 2001
    Publication date: May 2, 2002
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematsu, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri, Hiroshi Yamada, Toshio Yoshihara
  • Patent number: 6335832
    Abstract: An antireflection film containing a transparent substrate film, a hard coat layer on the substrate film, and first and second refractive index layers on the hard coat layer. The hard coat layer has a refractive index higher than the refractive index of the transparent substrate film; the first refractive index layer has a refractive index higher than the refractive index of the hard coat layer; the second refractive index layer has a refractive index lower than the refractive index of the hard coat layer.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: January 1, 2002
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematsu, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri, Hiroshi Yamada, Toshio Yoshihara
  • Publication number: 20010021446
    Abstract: This invention provides an anti-reflection film for use in various displays which prevents the reflection of light on the surface and enables necessary visual information to be clearly discerned. The anti-reflection film has a hard coat layer 4, an intermediate refractive index layer 3, a high refractive index layer 2 and a low refractive index layer 1 formed in this sequence on a transparent base film 5, such that the refractive indices of the adjacent layers satisfy the relationship 2.20>refractive index of the high refractive index layer>refractive index of the intermediate refractive index layer>refractive index of the low refractive index layer>1.40.
    Type: Application
    Filed: January 5, 2001
    Publication date: September 13, 2001
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Kiyotaka Takematsu, Hiroomi Katagiri
  • Patent number: 6207263
    Abstract: This invention provides an anti-reflection film for use in various displays which prevents the reflection of light on the surface and enables necessary visual information to be clearly discerned. The anti-reflection film has a hard coat layer 4, an intermediate refractive index layer 3, a high refractive index layer 2 and a low refractive index layer 1 formed in this sequence on a transparent base film 5, such that the refractive indices of the adjacent layers satisfy the relationship 2.20>refractive index of the high refractive index layer>refractive index of the intermediate refractive index layer>refractive index of the low refractive index layer >1.40.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: March 27, 2001
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kiyotaka Takematsu, Hiroomi Katagiri
  • Patent number: 6033743
    Abstract: An antireflection film, containing ultrafine particles, formed of a resin composition having excellent dispersibility of ultrafine particles in a binder resin and capable of preventing whitening, a polarizing plate, and a liquid crystal display device are provided.At least one resin layer is provided on a transparent substrate film directly or through other layer(s), and at least one of the resin layer has a controlled refractive index and is formed of a resin composition containing ultrafine particles. The outermost layer has a lower refractive index than an underlying layer in direct contact therewith. The resin composition contains a carboxyl-containing (meth)acrylate as part or the whole of a binder resin component. A polyfunctional acrylate having in its molecule three or more acryloyl groups may be added to the binder resin component in order to further enhance the properties of the hard coating.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: March 7, 2000
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hiroko Suzuki, Kiyotaka Takematsu, Mitsuru Tsuchiya, Hiroomi Katagiri
  • Patent number: 5976297
    Abstract: The present invention provides a transparent functional film comprising a transparent plastic substrate film and a hard coat layer provided thereon, wherein functional ultrafine particles are present in a highly localized form, thereby enabling the functional ultrafine particles to effectively exhibit their function and, at the same time, the hard coat layer to have a good adhesion to the functional ultrafine particle layer; and also an antireflection film and processes for producing the transparent functional film and the antireflection film.A functional ultrafine particle layer 2 is formed on a release film 1. Separately, a resin composition for a hard coat layer is coated on a transparent plastic substrate film 3.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: November 2, 1999
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematsu, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri, Hiroshi Yamada, Toshio Yoshihara
  • Patent number: 5770306
    Abstract: An antireflection film, containing ultrafine particles, formed of a resin composition having excellent dispersibility of ultrafine particles in a binder resin and capable of preventing whitening, a polarizing plate, and a liquid crystal display device are provided.At least one resin layer is provided on a transparent substrate film directly or through other layer(s), and at least one of the resin layer has a controlled refractive index and is formed of a resin composition containing ultrafine particles. The outermost layer has a lower refractive index than an underlying layer in direct contact therewith. The resin composition contains a carboxyl-containing (meth)acrylate as part or the whole of a binder resin component. A polyfunctional acrylate having in its molecule three or more acryloyl groups may be added to the binder resin component in order to further enhance the properties of the hard coating.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: June 23, 1998
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hiroko Suzuki, Kiyotaka Takematsu, Mitsuru Tsuchiya, Hiroomi Katagiri
  • Patent number: 5747152
    Abstract: A transparent functional film comprising a transparent plastic substrate film and a hard coat layer provided thereon, wherein functional ultrafine particles are present in a highly localized form, thereby enabling the functional ultrafine particles to effectively exhibit their function and, at the same time, the hard coat layer to have a good adhesion to the functional ultrafine particle layer; and also an antireflection film and processes for producing the transparent functional film and the antireflection film.
    Type: Grant
    Filed: December 1, 1994
    Date of Patent: May 5, 1998
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematsu, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri, Hiroshi Yamada, Toshio Yoshihara