Patents by Inventor Tadahisa Sato

Tadahisa Sato 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).

  • Patent number: 10256415
    Abstract: An organic light-emitting device having a compound represented by the following general formula in a light-emitting layer thereof has a high light emission efficiency. R1 to R5 each independently represent a hydrogen atom or a substituent having a Hammett ?p value of 0 or more. R6 to R20 each independently represent a hydrogen atom or a substituent, provided that at least one of R6 to R20 represents a substituted or unsubstituted N,N-diarylamino group. m represents 1 or 2.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: April 9, 2019
    Assignee: KYULUX, INC.
    Inventors: Tadahisa Sato, Shun Unayama, Jie Li, Chihaya Adachi
  • Publication number: 20170110670
    Abstract: An organic light-emitting device having a compound represented by the following general formula in a light-emitting layer thereof has a high light emission efficiency. R1 to R5 each independently represent a hydrogen atom or a substituent having a Hammett ?p value of 0 or more. R6 to R20 each independently represent a hydrogen atom or a substituent, provided that at least one of R6 to R20 represents a substituted or unsubstituted N,N-diarylamino group. m represents 1 or 2.
    Type: Application
    Filed: March 6, 2015
    Publication date: April 20, 2017
    Inventors: Tadahisa SATO, Shun UNAYAMA, Jie LI, Chihaya ADACHI
  • Patent number: 7682443
    Abstract: An organic-pigment aqueous dispersion, containing a pigment at a concentration of 6 to 30 mass %, and having a haze of 0.3 to 10%, as determined by enclosing the dispersion in a transparent glass cell of optical distance 0.2 mm and analyzing with integrating-sphere photoelectric photometry; and a colored coating composition using the same.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: March 23, 2010
    Assignee: Fujifilm Corporation
    Inventors: Tadahisa Sato, Hideki Maeta, Jun Tanabe, Hirokazu Kyota
  • Publication number: 20100063203
    Abstract: A coating composition containing a build-up organic pigment fine-particle.
    Type: Application
    Filed: November 1, 2007
    Publication date: March 11, 2010
    Applicant: FUJIFILM Corporation
    Inventors: Tadahisa Sato, Hideki Maeta, Jun Tanabe, Hirokazu Kyota
  • Patent number: 7578880
    Abstract: A method of producing fine particles of metal complex pigment, containing the step of reacting a solution of an alkali metal salt of a ligand that constitutes the metal complex with a solution of salts of a metal that constitutes the metal complex, in the course of a laminar flow in a channel; and a method of producing fine particles of metal complex pigment, containing the step of bringing a solution of an alkali metal salt of a ligand that constitutes the metal complex and a solution of salts of a metal that constitutes the metal complex into contact with each other in a channel having an equivalent diameter of 1 mm or less to form a liquid flow.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: August 25, 2009
    Assignee: FUJIFILM CORPORATION
    Inventors: Tadahisa Sato, Jun Tanabe, Hideki Maeta
  • Patent number: 7571969
    Abstract: The image forming apparatus includes a recording head which ejects droplets of a liquid onto a recording medium, the liquid containing fine particles of an organic pigment manufactured by the steps of: flowing a solution of an organic pigment dissolved in an alkaline or acidic aqueous medium through a channel which provides a laminar flow; and changing a hydrogen ion exponent (pH) of the solution in a course of the laminar flow.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: August 11, 2009
    Assignee: Fujifilm Corporation
    Inventors: Naoki Kusunoki, Tadahisa Sato, Hideki Maeta, Yuki Shimizu
  • Patent number: 7559621
    Abstract: The inkjet recording apparatus includes: a recording head including nozzles which discharge droplets of ink onto a recording medium for printing, the ink containing fine particles of an organic pigment manufactured by the steps of: flowing a solution of an organic pigment dissolved in an alkaline or acidic aqueous medium through a channel which provides a laminar flow; and changing a hydrogen ion exponent (pH) of the solution in a course of the laminar flow; a computing device which computes a non-operational time period for one of the nozzles; a calculating device which calculates a predicted non-operational time period until a next operation of the one of the nozzles; and a preliminary discharge control device which performs control whereby preliminary discharge of the one of the nozzles is carried out if a total of the non-operational time period and the predicted non-operational time period exceeds a reference time period.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: July 14, 2009
    Assignee: Fujifilm Corporation
    Inventors: Tsutomu Takatsuka, Toshiya Kojima, Tadahisa Sato, Hideki Maeta, Yuki Shimizu
  • Patent number: 7553961
    Abstract: A method of producing a metal phthalocyanine pigment, which contains the step of: allowing an alkali metal salt of phthalocyanine to react with a metal salt, in a solvent which is mainly composed of a sulfur-containing aprotic polar solvent.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: June 30, 2009
    Assignee: Fujifilm Corporation
    Inventor: Tadahisa Sato
  • Patent number: 7538155
    Abstract: A method of producing an organic pigment dispersion liquid, which has the steps of: providing an alkaline or acidic solution with an organic pigment dissolved therein and an aqueous medium, wherein a polymerizable compound is contained in at least one of the organic pigment solution and the aqueous medium; mixing the organic pigment solution and the aqueous medium; and thereby forming the pigment as fine particles; then polymerizing the polymerizable compound to form a polymer immobile from the pigment fine particles.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: May 26, 2009
    Assignee: FUJIFILM CORPORATION
    Inventors: Hideki Maeta, Tadahisa Sato
  • Publication number: 20080264300
    Abstract: An organic-pigment aqueous dispersion, containing a pigment at a concentration of 6 to 30 mass %, and having a haze of 0.3 to 10%, as determined by enclosing the dispersion in a transparent glass cell of optical distance 0.2 mm and analyzing with integrating-sphere photoelectric photometry; and a colored coating composition using the same.
    Type: Application
    Filed: April 11, 2008
    Publication date: October 30, 2008
    Applicant: FUJIFILM Corporation
    Inventors: Tadahisa Sato, Hideki Maeta, Jun Tanabe, Hirokazu Kyota
  • Patent number: 7427322
    Abstract: A method of producing a dispersion of a pigment, comprising: bringing a solution in which an organic pigment is dissolved, and an aqueous medium, into contact with each other in a channel having an equivalent diameter of 1 mm or less, thereby making the pigment into a fine particle thereof, wherein at least one of the solution and the aqueous medium comprises at least one anionic dispersing agent.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: September 23, 2008
    Assignee: FUJIFILM Corporation
    Inventors: Hideki Maeta, Yuki Shimizu, Tadahisa Sato
  • Publication number: 20070289500
    Abstract: A method of producing a dispersion of a pigment, comprising: bringing a solution in which an organic pigment is dissolved, and an aqueous medium, into contact with each other in a channel having an equivalent diameter of 1 mm or less, thereby making the pigment into a fine particle thereof, wherein at least one of the solution and the aqueous medium comprises at least one anionic dispersing agent.
    Type: Application
    Filed: August 13, 2007
    Publication date: December 20, 2007
    Applicant: FUJIFILM CORPORATION
    Inventors: Hideki Maeta, Yuki Shimizu, Tadahisa Sato
  • Publication number: 20070056471
    Abstract: A method of producing fine particles of metal complex pigment, containing the step of reacting a solution of an alkali metal salt of a ligand that constitutes the metal complex with a solution of salts of a metal that constitutes the metal complex, in the course of a laminar flow in a channel; and a method of producing fine particles of metal complex pigment, containing the step of bringing a solution of an alkali metal salt of a ligand that constitutes the metal complex and a solution of salts of a metal that constitutes the metal complex into contact with each other in a channel having an equivalent diameter of 1 mm or less to form a liquid flow.
    Type: Application
    Filed: September 5, 2006
    Publication date: March 15, 2007
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Tadahisa Sato, Jun Tanabe, Hideki Maeta
  • Publication number: 20070012221
    Abstract: A method of producing an organic pigment dispersion liquid, which has the steps of: providing an alkaline or acidic solution with an organic pigment dissolved therein and an aqueous medium, wherein a polymerizable compound is contained in at least one of the organic pigment solution and the aqueous medium; mixing the organic pigment solution and the aqueous medium; and thereby forming the pigment as fine particles; then polymerizing the polymerizable compound to form a polymer immobile from the pigment fine particles.
    Type: Application
    Filed: July 5, 2006
    Publication date: January 18, 2007
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Hideki Maeta, Tadahisa Sato
  • Patent number: 7160380
    Abstract: A method of producing a fine particle of an organic pigment, containing the steps of: flowing a solution of an organic pigment dissolved in an alkaline or acidic aqueous medium, through a channel which provides a laminar flow; and changing a pH of the solution in the course of the laminar flow.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: January 9, 2007
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideki Maeta, Yuki Shimizu, Tadahisa Sato
  • Publication number: 20060260510
    Abstract: A method of producing a dispersion of a pigment, comprising: bringing a solution in which an organic pigment is dissolved, and an aqueous medium, into contact with each other in a channel having an equivalent diameter of 1 mm or less, thereby making the pigment into a fine particle thereof, wherein at least one of the solution and the aqueous medium comprises at least one anionic dispersing agent.
    Type: Application
    Filed: July 27, 2006
    Publication date: November 23, 2006
    Inventors: Hideki Maeta, Yuki Shimizu, Tadahisa Sato
  • Publication number: 20060197787
    Abstract: The image forming apparatus comprises a recording head which ejects droplets of a liquid onto a recording medium, the liquid containing fine particles of an organic pigment manufactured by the steps of: flowing a solution of an organic pigment dissolved in an alkaline or acidic aqueous medium through a channel which provides a laminar flow; and changing a hydrogen ion exponent (pH) of the solution in a course of the laminar flow.
    Type: Application
    Filed: March 2, 2006
    Publication date: September 7, 2006
    Inventors: Naoki Kusunoki, Tadahisa Sato, Hideki Maeta, Yuki Shimizu
  • Publication number: 20060197795
    Abstract: The inkjet recording apparatus comprises: a recording head including nozzles which discharge droplets of ink onto a recording medium for printing, the ink containing fine particles of an organic pigment manufactured by the steps of: flowing a solution of an organic pigment dissolved in an alkaline or acidic aqueous medium through a channel which provides a laminar flow; and changing a hydrogen ion exponent (pH) of the solution in a course of the laminar flow; a computing device which computes a non-operational time period for one of the nozzles; a calculating device which calculates a predicted non-operational time period until a next operation of the one of the nozzles; and a preliminary discharge control device which performs control whereby preliminary discharge of the one of the nozzles is carried out if a total of the non-operational time period and the predicted non-operational time period exceeds a reference time period.
    Type: Application
    Filed: March 2, 2006
    Publication date: September 7, 2006
    Inventors: Tsutomu Takatsuka, Toshiya Kojima, Tadahisa Sato, Hideki Maeta, Yuki Shimizu
  • Publication number: 20060116511
    Abstract: A method of producing a metal phthalocyanine pigment, which contains the step of: allowing an alkali metal salt of phthalocyanine to react with a metal salt, in a solvent which is mainly composed of a sulfur-containing aprotic polar solvent.
    Type: Application
    Filed: September 26, 2005
    Publication date: June 1, 2006
    Inventor: Tadahisa Sato
  • Publication number: 20050143501
    Abstract: A polycarbonate resin molding comprising a polycarbonate resin composition, wherein the polycarbonate resin composition comprises: a polycarbonate resin; at least one of an ultraviolet absorber and a fluorescent whitening agent; a hindered amine; and a hindered phenol, wherein the polycarbonate resin molding has a light transmittance of 0.1% or lower in a wavelength of not longer than 410 nm, and a lamp cover comprising the resin molding.
    Type: Application
    Filed: December 21, 2004
    Publication date: June 30, 2005
    Inventors: Tadahisa Sato, Takashi Usami