Patents by Inventor Takuto Nishiguchi

Takuto Nishiguchi 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).

  • Azo compound and salts thereof, as well as dye-based polarization films and polarizing plates comprising the same
    Patent number: 8477268
    Abstract: Azo compounds represented by formula (1) (In the formula, R1 represents a lower alkoxy group with a sulfone group. R2-R5 each independently represents a hydrogen atom, lower alkyl group or lower alkoxy group. X is an optionally substituted amino group, optionally substituted benzoylamino group, optionally substituted phenylamino group, optionally substituted phenyl azo group or optionally substituted naphthotriazole group. m represents 1 or 2 and n represents 0 or 1.) and salts thereof.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: July 2, 2013
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventors: Takuto Nishiguchi, Hiroaki Ohno, Takahiro Higeta, Yuichi Sadamitsu
  • Azo Compound And Salts Thereof, As Well As Dye-Based Polarization Films And Polarizing Plates Comprising The Same
    Publication number: 20110164208
    Abstract: Azo compounds represented by formula (1) (In the formula, R1 represents a lower alkoxy group with a sulfone group. R2-R5 each independently represents a hydrogen atom, lower alkyl group or lower alkoxy group. X is an optionally substituted amino group, optionally substituted benzoylamino group, optionally substituted phenylamino group, optionally substituted phenyl azo group or optionally substituted naphthotriazole group. m represents 1 or 2 and n represents 0 or 1.) and salts thereof.
    Type: Application
    Filed: May 19, 2009
    Publication date: July 7, 2011
    Applicants: NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.
    Inventors: Takuto Nishiguchi, Hiroaki Ohno, Takahiro Higeta, Yuichi Sadamitsu
  • Azo compound and salt thereof, and dye-containing polarizing film comprising the compound or salt
    Patent number: 7931702
    Abstract: Disclosed is an azo compound represented by the general formula (1) or a salt thereof: wherein R1 and R2 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxy group; and n represents 1 or 2. Also disclosed are a dye-containing polarizing film and a dye-containing polarizing plate, each of which comprises a polarizing film base material and the azo compound contained in the base material.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: April 26, 2011
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventors: Yuichi Sadamitsu, Takuto Nishiguchi, Hiroaki Ohno
  • Azo Compounds, And Dye-Based Polarizing Films And Polarizing Plates Comprising The Same
    Publication number: 20110075076
    Abstract: Azo compounds represented by formula (1) or (2) (In the formulas, A represents a phenyl group or naphthyl group that has at least 1 substituent. R1-R4 represent a hydrogen atom, lower alkyl group or lower alkoxy group, with at least one of R1-R4 being a lower alkoxy group that has a sulfone group. X represents an optionally substituted amino group, optionally substituted benzoylamino group, optionally substituted phenylamino group, optionally substituted phenyl azo group or optionally substituted naphthotriazole group) and salts thereof.
    Type: Application
    Filed: May 19, 2009
    Publication date: March 31, 2011
    Applicants: NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.
    Inventors: Takuto Nishiguchi, Hiroaki Ohno, Takahiro Higeta, Yuichi Sadamitsu
  • Azo Compound And Salt Thereof, And Dye-Containing Polarizing Film Comprising The Compound Or Salt
    Publication number: 20110063546
    Abstract: Disclosed is an azo compound represented by the general formula (1) or a salt thereof: wherein R1 and R2 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxy group; and n represents 1 or 2. Also disclosed are a dye-containing polarizing film and a dye-containing polarizing plate, each of which comprises a polarizing film base material and the azo compound contained in the base material.
    Type: Application
    Filed: November 17, 2010
    Publication date: March 17, 2011
    Applicants: NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.
    Inventors: Yuichi Sadamitsu, Takuto Nishiguchi, Hiroaki Ohno
  • Azo Compound And Salt Thereof, And Dye-Containing Polarizing Film Comprising The Compound Or Salt
    Publication number: 20110060134
    Abstract: Disclosed is an azo compound represented by the general formula (1) or a salt thereof: wherein R1 and R2 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxy group; and n represents 1 or 2. Also disclosed are a dye-containing polarizing film and a dye-containing polarizing plate, each of which comprises a polarizing film base material and the azo compound contained in the base material.
    Type: Application
    Filed: November 17, 2010
    Publication date: March 10, 2011
    Applicants: NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.
    Inventors: Yuichi Sadamitsu, Takuto Nishiguchi, Hiroaki Ohno
  • Azo compound and salt thereof, and dye-containing polarizing film comprising the compound or salt
    Publication number: 20090126127
    Abstract: Disclosed is an azo compound represented by the general formula (1) or a salt thereof: wherein R1 and R2 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxy group; and n represents 1 or 2. Also disclosed are a dye-containing polarizing film and a dye-containing polarizing plate, each of which comprises a polarizing film base material and the azo compound contained in the base material.
    Type: Application
    Filed: May 24, 2007
    Publication date: May 21, 2009
    Inventors: Yuichi Sadamitsu, Takuto Nishiguchi, Hiroaki Ohno