Patents by Inventor Toru Umemoto

Toru Umemoto 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: 20140345917
    Abstract: Provided are a double-sided transparent conductive film which is good in appearance even when its transparent conductive layers are patterned, and has anti-blocking property, thereby being producible at low costs; a wound body thereof; and a touch panel.
    Type: Application
    Filed: May 20, 2014
    Publication date: November 27, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Naoki Hashimoto, Shinya Hiraoka, Kazuhiro Ikai, Hiroki Kuramoto, Hiroyuki Takao, Naoki Tsuno, Toru Umemoto
  • Patent number: 8808813
    Abstract: The present invention provides a method of producing a liquid crystalline coating liquid that substantially does not contain a fine crystal. The method of producing a liquid crystalline coating liquid of the present invention contains a heating step of heating a treatment liquid containing a lyotropic liquid crystalline compound containing an impurity, and a solvent, a depositing step of depositing a deposit by cooling the treatment liquid after the heating step to a temperature lower than 40° C., and a removing step of removing the deposit from the treatment liquid.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: August 19, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Shoichi Matsuda, Toru Umemoto, Tadayuki Kameyama
  • Patent number: 8790544
    Abstract: It is possible to obtain a polarizing film having a high dichroic ratio by using a liquid-crystalline coating solution in which a small quantity of a second lyotropic liquid-crystalline low-molecular compound is mixed with a first lyotropic liquid-crystalline low-molecular compound. The second lyotropic liquid-crystalline low-molecular compound has a mole number smaller than the first lyotropic liquid-crystalline low-molecular compound. The molecular size of the second lyotropic liquid-crystalline low-molecular compound is smaller than that of the first lyotropic liquid-crystalline low-molecular compound.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: July 29, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Shoichi Matsuda, Tadayuki Kameyama, Sadahiro Nakanishi, Toru Umemoto
  • Patent number: 8785607
    Abstract: The present invention relates to a method for manufacturing a water resistant optically anisotropic film comprising: a water resistant treatment step of bringing an optically anisotropic film containing an organic dye having an anionic group into contact with a water resistant treatment liquid containing a multivalent metal salt or a compound having two or more nitrogen atoms in a molecule thereof; and a cleaning step of cleaning the optically anisotropic film after the water resistant treatment, using a cleaning liquid containing a hydrophilic organic compound.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: July 22, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Toru Umemoto, Tadayuki Kameyama
  • Publication number: 20140065304
    Abstract: Provided is a method for manufacturing a long laminate film having a uniform coating layer while suppressing wrinkling of the coating receiving surface of a long film used as a base film, the method including supporting the long film with first and second guide rolls while feeding the long film, nipping transverse both ends of the long film with a pair of nip rolls and the guide roll while feeding the long film, and applying a coating material to the long film to form a coating layer, wherein the guide roll has both end parts, which are arranged opposite to the pair of nip rolls, and a middle part other than both end parts, and both end parts have an outer diameter larger than that of the middle part.
    Type: Application
    Filed: December 5, 2012
    Publication date: March 6, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shoichi Matsuda, Yoshiaki Asanoi, Toru Umemoto, Tadayuki Kameyama
  • Publication number: 20140048200
    Abstract: A method for producing an optical laminate including a film substrate and a polarizing layer which comprises the steps of: (A) laminating a re-releasable film on one main surface of the film substrate to obtain a laminate film substrate; B) performing a rubbing treatment on the other main surface of the film substrate of the laminate film substrate; C) coating the rubbing-treated surface of the film substrate with a solution containing a lyotropic liquid crystal compound and a solvent; and D) detaching the re-releasable film from the laminate film substrate.
    Type: Application
    Filed: April 5, 2012
    Publication date: February 20, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yoshiaki Asanoi, Toru Umemoto, Shoichi Matsuda, Tadayuki Kameyama
  • Patent number: 8597550
    Abstract: There is provided a method for producing a polarizing film having far superior water resistance to conventional polarizing films by contacting a liquid containing cationic polymers with a surface of a polarizing film.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: December 3, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Toru Umemoto, Junzo Miyazaki, Shoichi Matsuda, Sadahiro Nakanishi
  • Patent number: 8559106
    Abstract: A water-resistant polarizing film having an organic colorant having an anionic group, and organic nitrogen compounds. The organic nitrogen compounds include a first organic nitrogen compound having at least two nitrogen atoms in the molecule thereof, and a second organic nitrogen compound having at least two nitrogen atoms in the molecule thereof. The distance (A) between adjacent nitrogen atoms in the first organic nitrogen compound is shorter than the distance (B) between adjacent atoms of the nitrogen atoms in the second organic nitrogen compound.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: October 15, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Toru Umemoto, Toshimasa Nishimori, Tadayuki Kameyama
  • Publication number: 20120314179
    Abstract: The present invention provides a method of producing a liquid crystalline coating liquid that substantially does not contain a fine crystal. The method of producing a liquid crystalline coating liquid of the present invention contains a heating step of heating a treatment liquid containing a lyotropic liquid crystalline compound containing an impurity, and a solvent, a depositing step of depositing a deposit by cooling the treatment liquid after the heating step to a temperature lower than 40° C., and a removing step of removing the deposit from the treatment liquid.
    Type: Application
    Filed: May 19, 2011
    Publication date: December 13, 2012
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shoichi Matsuda, Toru Umemoto, Tadayuki Kameyama
  • Patent number: 8282864
    Abstract: There is provided a water-resistant polarizing film including an organic dye having at least two anionic groups, and an alicyclic structure-containing compound having at least two nitrogen atoms in a molecule.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: October 9, 2012
    Assignee: Nitto Denko Corporation
    Inventors: Toru Umemoto, Sadahiro Nakanishi, Tadayuki Kameyama
  • Patent number: 8189165
    Abstract: A liquid-crystalline coating fluid comprises: a lyotropic liquid crystal compound; a vinyl alcohol-based polymer; and a solvent, wherein 0.05 to 1.5 weight parts of vinyl alcohol-based polymer is contained with respect to 100 weight parts of the lyotropic liquid-crystal compound.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: May 29, 2012
    Assignee: Nitto Denko Corporation
    Inventors: Toru Umemoto, Toshimasa Nishimori, Tadayuki Kameyama
  • Publication number: 20120105795
    Abstract: It is possible to obtain a polarizing film having a high dichroic ratio by using a liquid-crystalline coating solution in which a small quantity of a second lyotropic liquid-crystalline low-molecular compound is mixed with a first lyotropic liquid-crystalline low-molecular compound. The second lyotropic liquid-crystalline low-molecular compound has a mole number smaller than the first lyotropic liquid-crystalline low-molecular compound. The molecular size of the second lyotropic liquid-crystalline low-molecular compound is smaller than that of the first lyotropic liquid-crystalline low-molecular compound.
    Type: Application
    Filed: July 1, 2010
    Publication date: May 3, 2012
    Applicant: Nitto Denko Corporation
    Inventors: Shoichi Matsuda, Tadayuki Kameyama, Sadahiro Nakanishi, Toru Umemoto
  • Publication number: 20120059157
    Abstract: The present invention relates to a method for manufacturing a water resistant optically anisotropic film comprising: a water resistant treatment step of bringing an optically anisotropic film containing an organic dye having an anionic group into contact with a water resistant treatment liquid containing a multivalent metal salt or a compound having two or more nitrogen atoms in a molecule thereof; and a cleaning step of cleaning the optically anisotropic film after the water resistant treatment, using a cleaning liquid containing a hydrophilic organic compound.
    Type: Application
    Filed: August 12, 2011
    Publication date: March 8, 2012
    Applicant: NITTO DENKO CORPORATION
    Inventors: Toru Umemoto, Tadayuki Kameyama
  • Publication number: 20110297897
    Abstract: There is provided, a process for producing a water-proof polarizing film having a high dichroic ratio free from cracks by contacting a polarizing film including a mixture of an organic dye and polyvinyl alcohol-based polymers with a water-proof treatment liquid containing the following to perform water-proof treatment: (1) at least one of organic amine cations and multivalent metal cations; and (2) tetrahydroxy borate anions.
    Type: Application
    Filed: October 5, 2009
    Publication date: December 8, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Toru Umemoto, Satoru Suzuki, Tadayuki Kameyama
  • Publication number: 20110284810
    Abstract: There is provided a water-resistant polarizing film including an organic dye having at least two anionic groups, and an alicyclic structure-containing compound having at least two nitrogen atoms in a molecule.
    Type: Application
    Filed: October 5, 2009
    Publication date: November 24, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Toru Umemoto, Sadahiro Nakanishi, Tadayuki Kameyama
  • Publication number: 20110205629
    Abstract: The water-resistant polarizing film of the present invention comprises an organic colorant having an anionic group, and organic nitrogen compounds. The organic nitrogen compounds include a first organic nitrogen compound having at least two nitrogen atoms in the molecule thereof, and a second organic nitrogen compound having at least two nitrogen atoms in the molecule thereof. The distance (A) between adjacent nitrogen atoms in the first organic nitrogen compound is shorter than the distance (B) between adjacent atoms of the nitrogen atoms in the second organic nitrogen compound.
    Type: Application
    Filed: April 20, 2010
    Publication date: August 25, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Toru Umemoto, Toshimasa Nishimori, Tadayuki Kameyama
  • Publication number: 20110134526
    Abstract: A water-resistant polarizing film of the present invention contains an organic colorant having an anionic group and a non-cyclic compound having 2 to 5 nitrogen atoms. The non-cyclic compound is a linear aliphatic diamine or a salt thereof and more preferably an aliphatic diamine having 2 to 8 carbon atoms or a salt thereof. For example, the water-resistant polarizing film of the present invention can be produced by bringing a treating liquid containing the non-cyclic compound into contact with a single surface or both surfaces of a polarizing film containing the organic colorant.
    Type: Application
    Filed: November 4, 2009
    Publication date: June 9, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Toru Umemoto, Sadahiro Nakanishi, Tadayuki Kameyama
  • Publication number: 20110097483
    Abstract: There is provided a method for producing a polarizing film having far superior water resistance to conventional polarizing films by contacting a liquid containing cationic polymers with a surface of a polarizing film.
    Type: Application
    Filed: February 4, 2009
    Publication date: April 28, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Toru Umemoto, Junzo Miyazaki, Shoichi Matsuda, Sadahiro Nakanishi
  • Publication number: 20100128216
    Abstract: A liquid-crystalline coating fluid comprises: a lyotropic liquid crystal compound; a vinyl alcohol-based polymer; and a solvent, wherein 0.05 to 1.5 weight parts of vinyl alcohol-based polymer is contained with respect to 100 weight parts of the lyotropic liquid-crystal compound.
    Type: Application
    Filed: November 18, 2008
    Publication date: May 27, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Toru Umemoto, Toshimasa Nishimori, Tadayuki Kameyama
  • Publication number: 20100062259
    Abstract: The present invention provides a method for manufacturing a laminate having a hydrophobic resin substrate and an orientation layer containing an organic dye, wherein the method comprises a step (1) of carrying out a plasma treatment on a surface of the hydrophobic resin substrate under an atmosphere having a nitrogen concentration of 80% or higher and a step (2) of forming the orientation layer containing the organic dye on the hydrophobic resin substrate by applying a solution containing the organic dye exhibiting lyotropic liquid crystallinity and a hydrophilic solvent on the surface of the hydrophobic resin substrate on which the plasma treatment is carried out and drying the solution. According to the method for manufacturing the laminate of the present invention, the solution may be applied on the hydrophobic resin substrate approximately uniformly and an excellent orientation layer having an extremely small number of defects may be formed.
    Type: Application
    Filed: June 19, 2008
    Publication date: March 11, 2010
    Applicant: Nitto Denko Corporation
    Inventors: Toru Umemoto, Tadayuki Kameyama, Kazunori Kawamura