Patents by Inventor Hitoshi Kitagishi

Hitoshi Kitagishi 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: 20160238769
    Abstract: A resin film according to an embodiment of the present invention includes: a substrate film; and an antistatic layer formed on one side of the substrate film and including a binder resin and a conductive material. The binder resin includes a polyurethane-based resin; the antistatic layer has an arithmetic average surface roughness Ra of 10 nm or more; and the conductive material includes a conductive polymer.
    Type: Application
    Filed: April 29, 2016
    Publication date: August 18, 2016
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hitoshi Kitagishi, Satoru Kunikata, Minoru Miyatake
  • Patent number: 9411081
    Abstract: The present invention provides a method of manufacturing a polarizing plate having sufficient heat resistance, without deteriorating the dye-affinity and the like of the polarizing film and without the necessity of transferring or detaching the polarizing film. Provided is a method of manufacturing a polarizing plate (10) that includes a polyester resin base (11) and a polarizing film including a polyvinyl alcohol resin laminated on the polyester resin base. The method includes the steps of: stretching a laminate that includes a polyvinyl alcohol resin layer (12) laminated on the polyester resin base (11); dyeing the polyvinyl alcohol resin layer (12); and crystallizing the polyester resin base (11). The crystallization step is performed after the dyeing step.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: August 9, 2016
    Assignee: NITTO DENKO CORPORATION
    Inventors: Takashi Shimizu, Takashi Kamijo, Hitoshi Kitagishi, Minoru Miyatake, Shusaku Goto, Takeharu Kitagawa, Tomohiro Mori, Nobuyuki Haida
  • Patent number: 9340681
    Abstract: A resin film according to an embodiment of the present invention includes: a substrate film; and an antistatic layer formed on one side of the substrate film and including a binder resin and a conductive material. The binder resin includes a polyurethane-based resin; the antistatic layer has an arithmetic average surface roughness Ra of 10 nm or more; and the conductive material includes a conductive polymer.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: May 17, 2016
    Assignee: NITTO DENKO CORPORATION
    Inventors: Hitoshi Kitagishi, Satoru Kunikata, Minoru Miyatake
  • Patent number: 9310523
    Abstract: A laminate according to an embodiment of the present invention includes: a resin substrate; a polyvinyl alcohol-based resin layer formed on one side of the resin substrate; and an antistatic layer formed on another side of the resin substrate and comprising a binder resin and a conductive material. The binder resin includes a polyurethane-based resin; the antistatic layer has an arithmetic average surface roughness Ra of 10 nm or more; and the conductive material includes a conductive polymer.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: April 12, 2016
    Assignee: NITTO DENKO CORPORATION
    Inventors: Satoru Kunikata, Hitoshi Kitagishi, Minoru Miyatake
  • Publication number: 20140065364
    Abstract: A resin film according to an embodiment of the present invention includes: a substrate film; and an antistatic layer formed on one side of the substrate film and including a binder resin and a conductive material. The binder resin includes a polyurethane-based resin; the antistatic layer has an arithmetic average surface roughness Ra of 10 nm or more; and the conductive material includes a conductive polymer.
    Type: Application
    Filed: August 20, 2013
    Publication date: March 6, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hitoshi Kitagishi, Satoru Kunikata, Minoru Miyatake
  • Publication number: 20140065429
    Abstract: A laminate according to an embodiment of the present invention includes: a resin substrate; a polyvinyl alcohol-based resin layer formed on one side of the resin substrate; and an antistatic layer formed on another side of the resin substrate and comprising a binder resin and a conductive material. The binder resin includes a polyurethane-based resin; the antistatic layer has an arithmetic average surface roughness Ra of 10 nm or more; and the conductive material includes a conductive polymer.
    Type: Application
    Filed: August 20, 2013
    Publication date: March 6, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Satoru Kunikata, Hitoshi Kitagishi, Minoru Miyatake
  • Publication number: 20130249129
    Abstract: The present invention provides a method of manufacturing a polarizing plate having sufficient heat resistance, without deteriorating the dye-affinity and the like of the polarizing film and without the necessity of transferring or detaching the polarizing film. Provided is a method of manufacturing a polarizing plate (10) that includes a polyester resin base (11) and a polarizing film including a polyvinyl alcohol resin laminated on the polyester resin base. The method includes the steps of; stretching a laminate that includes a polyvinyl alcohol resin layer (12) laminated on the polyester resin base (11); dyeing the polyvinyl alcohol resin layer (12); and crystallizing the polyester resin base (11). The crystallization step is performed after the dyeing step.
    Type: Application
    Filed: December 1, 2011
    Publication date: September 26, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takashi Shimizu, Takashi Kamijo, Hitoshi Kitagishi, Minoru Miyatake, Shusaku Goto, Takeharu Kitagawa, Tomohiro Mori, Nobuyuki Haida
  • Publication number: 20100047484
    Abstract: Provided is a polarizer protective film of thin type, which has excellent heat resistance and excellent transparency as well as excellent UV-absorbing ability, has good external appearance of a film surface, and can be stably produced by film forming. The polarizer protective film of the present invention includes a resin layer (A) and a resin layer (B1) in the stated order, in which the resin layer (A) is a resin layer containing a (meth) acrylic resin as a main component and contains a UV absorber at a ratio of 0.5 to 10 wt % with respect to a resin component contained in the resin layer (A), and the resin layer (B1) is a resin layer containing a (meth) acrylic resin as a main component and contains a UV absorber at a ratio of more than 0 wt % and 2 wt % or less with respect to a resin component contained in the resin layer (B1).
    Type: Application
    Filed: December 5, 2007
    Publication date: February 25, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hitoshi Kitagishi, Daisuke Hattori, Nobuyuki Haida, Tsutomu Hani, Hiroyuki Takao
  • Publication number: 20100033810
    Abstract: Provided is a polarizer protective film of thin type, which has excellent heat resistance and excellent transparency as well as excellent UV-absorbing ability, has good external appearance of a film surface, and can be stably produced by film forming. The polarizer protective film of the present invention includes a resin layer (A) and a resin layer (B1) in the stated order, in which the resin layer (A) is a resin layer containing a (meth)acrylic resin as a main component and contains a UV absorber at a ratio of 0.5 to 10 wt % with respect to a resin component contained in the resin layer (A), and the resin layer (B1) is a resin layer containing, as a main component, a thermoplastic resin other than a (meth) acrylic resin.
    Type: Application
    Filed: December 5, 2007
    Publication date: February 11, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Nobuyuki Haida, Daisuke Hattori, Tsutomu Hani, Hiroyuki Takao, Hitoshi Kitagishi