Patents by Inventor Ryota Hatsuda

Ryota Hatsuda 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).

  • Method of manufacturing polarizer, polarizer, polarizing plate, optical film, method of manufacturing composite polarizing plate, composite polarizing plate and image display
    Patent number: 8305547
    Abstract: A method of manufacturing a polarizer is provided that makes it possible to virtually simultaneously perform a contact of a hydrophilic polymer film with liquid and stretch of the hydrophilic polymer film in a width direction by a tenter method, or the like, using a small and simple manufacturing equipment. A method of manufacturing a polarizer includes a width direction stretching process for stretching a hydrophilic polymer film 1 in the width direction, which is continuously supplied, by gripping both ends in a width direction thereof with grip means 2 and moving the grip means 2 in a longitudinal direction of the film 1 as well as by bringing the film 1 into contact with liquid and also moving the grip means 2, which grips at least one of both ends in the width direction of the film 1, outwardly in the width direction of the film 1; and a dyeing process for dyeing the film 1 by a dichroic material.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: November 6, 2012
    Assignee: Nitto Denko Corporation
    Inventors: Ryota Hatsuda, Seiji Umemoto, Kazuya Hada, Hiroyuki Yoshimi, Satoshi Hirata
  • METHOD OF MANUFACTURING POLARIZER, POLARIZER, POLARIZING PLATE, OPTICAL FILM, METHOD OF MANUFACTURING COMPOSITE POLARIZING PLATE, COMPOSITE POLARIZING PLATE AND IMAGE DISPLAY
    Publication number: 20100321613
    Abstract: A method of manufacturing a polarizer is provided that makes it possible to virtually simultaneously perform a contact of a hydrophilic polymer film with liquid and stretch of the hydrophilic polymer film in a width direction by a tenter method, or the like, using a small and simple manufacturing equipment. A method of manufacturing a polarizer includes a width direction stretching process for stretching a hydrophilic polymer film 1 in the width direction, which is continuously supplied, by gripping both ends in a width direction thereof with grip means 2 and moving the grip means 2 in a longitudinal direction of the film 1 as well as by bringing the film 1 into contact with liquid and also moving the grip means 2, which grips at least one of both ends in the width direction of the film 1, outwardly in the width direction of the film 1; and a dyeing process for dyeing the film 1 by a dichroic material.
    Type: Application
    Filed: November 12, 2007
    Publication date: December 23, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Ryota Hatsuda, Seiji Umemoto, Kazuya Hada, Hiroyuki Yoshimi, Satoshi Hirata