Patents by Inventor Tomohisa Yamada

Tomohisa Yamada 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: 9394231
    Abstract: A composition for forming an antistatic film, includes: an oligomer compound of Formula (1A): (where R1 is a hydrogen atom or a group of Formula (2), each of R2 and R3 is independently a hydrogen atom, a group of Formula (3), or a group of Formula (4), at least one of the plurality of Rs is a sulfo group, a and b are positive integers satisfying 2?(a+b)?6; and each of a plurality of xs is independently an integer from 0 to 4): (where n is an integer satisfying 1?n<(a+b+4); a, b, a plurality of Rs, and x are the same as those in Formula (1A); and each of a plurality of ys is independently an integer from 0 to 5); and water.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: July 19, 2016
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tokio Nishita, Ryuta Mizuochi, Rikimaru Sakamoto, Tomohisa Yamada, Naoki Nakaie, Yuki Takayama
  • Patent number: 9049771
    Abstract: Disclosed is a charge-transporting material comprising a heteropoly acid compound such as phosphomolybdic acid as a charge-transporting substance. Also disclosed is a charge-transporting varnish comprising the charge-transporting material and an organic solvent, wherein the charge-transporting substance is dissolved in the organic solvent. It becomes possible to provide a charge-transporting material which comprises a substance having high solubility in an organic solvent, charge-transporting properties, and an ability to oxidize hole transport materials, and a charge-transporting varnish comprising the charge-transporting material.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: June 2, 2015
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takuji Yoshimoto, Tomohisa Yamada
  • Publication number: 20150008372
    Abstract: A composition for forming an antistatic film, includes: an oligomer compound of Formula (1A): (where R1 is a hydrogen atom or a group of Formula (2), each of R2 and R3 is independently a hydrogen atom, a group of Formula (3), or a group of Formula (4), at least one of the plurality of Rs is a sulfo group, a and b are positive integers satisfying 2?(a+b)?6; and each of a plurality of xs is independently an integer from 0 to 4): (where n is an integer satisfying 1?n<(a+b+4); a, b, a plurality of Rs, and x are the same as those in Formula (1A); and each of a plurality of ys is independently an integer from 0 to 5); and water.
    Type: Application
    Filed: November 12, 2012
    Publication date: January 8, 2015
    Inventors: Tokio Nishita, Ryuta Mizuochi, Rikimaru Sakamoto, Tomohisa Yamada, Naoki Nakaie, Yuki Takayama
  • Patent number: 8747700
    Abstract: Provided are charge-transporting varnishes that can form satisfactory thin films and can provide organic EL elements that can exhibit excellent emission efficiency and luminance characteristics when used for EL elements that have a structure on a substrate. The charge-transporting varnishes comprise quinone diimine derivatives represented by general formula (1) that are oligoaniline derivatives or oxides thereof, electron-accepting dopant substances or hole-accepting dopant substances, and at least one kind of silane compound. [In the formula, R1, R2 and R3 each independently represents a hydrogen atom, a halogen atom, a hydroxyl group, etc. A and B each independently represents a divalent group represented by general formula (2) or (3). (In the formulas, R4-R11 each independently represents a hydrogen atom, a halogen atom, a hydroxyl group, etc.) m and n are each independently integers of 1 or greater and satisfy m+n?20.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: June 10, 2014
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Naoki Nakaie, Tomohisa Yamada
  • Patent number: 8575392
    Abstract: A charge-transporting varnish comprising a phenylamino-N,N?-diphenylquinonediimine derivative represented by the formula (1) as a charge-transporting substance. It becomes possible to provide a charge-transporting varnish comprising an oxidized oligoaniline, which has a high solubility in various organic solvents and also has a good filtration property because the varnish has no aggregation property. (wherein R1 represents a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group; and R2 to R19 independently represent a hydrogen atom, a hydroxyl group, an amino group, a silanol group, a thiol group, a carboxyl group, a phosphoric acid group, a phosphate ester group, an ester group, a thioester group, an amide group, a nitro group, a substituted or unsubstituted monovalent hydrocarbon group, an organooxy group, an organoamino group, an organosilyl group, an organothio group, an acyl group, a sulfone group or a halogen atom.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: November 5, 2013
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takuji Yoshimoto, Tomohisa Yamada, Taku Kato
  • Patent number: 8298444
    Abstract: Any of the oligoaniline compounds with a triphenylamine structure represented by the formula (1) exhibits satisfactory light emitting efficiency and brightness performance when used in either an OLED device or a PLED device and is further satisfactory in the solubility in organic solvents so as to be applicable to various coating methods. (each of R1 and R2 independently is a hydrogen atom, an optionally substituted monovalent hydrocarbon group, t-butoxycarbonyl, etc.; each of R3 to R34 independently is a hydrogen atom, hydroxyl, silanol, thiol, carboxyl, a phosphoric group, a phosphoric ester group, ester, thioester, amido, nitro, an optionally substituted monovalent hydrocarbon group, etc.; and each of m and n is an integer of 1 or greater provided that they satisfy the relationship m+n ?20).
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: October 30, 2012
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Tomohisa Yamada, Takuji Yoshimoto
  • Publication number: 20110220853
    Abstract: Disclosed is a charge-transporting material comprising a heteropoly acid compound such as phosphomolybdic acid as a charge-transporting substance. Also disclosed is a charge-transporting varnish comprising the charge-transporting material and an organic solvent, wherein the charge-transporting substance is dissolved in the organic solvent. It becomes possible to provide a charge-transporting material which comprises a substance having high solubility in an organic solvent, charge-transporting properties, and an ability to oxidize hole transport materials, and a charge-transporting varnish comprising the charge-transporting material.
    Type: Application
    Filed: November 18, 2009
    Publication date: September 15, 2011
    Inventors: Takuji Yoshimoto, Tomohisa Yamada
  • Publication number: 20100230639
    Abstract: Any of the oligoaniline compounds with a triphenylamine structure represented by the formula (1) exhibits satisfactory light emitting efficiency and brightness performance when used in either an OLED device or a PLED device and is further satisfactory in the solubility in organic solvents so as to be applicable to various coating methods. (each of R1 and R2 independently is a hydrogen atom, an optionally substituted monovalent hydrocarbon group, t-butoxycarbonyl, etc.; each of R3 to R34 independently is a hydrogen atom, hydroxyl, silanol, thiol, carboxyl, a phosphoric group, a phosphoric ester group, ester, thioester, amido, nitro, an optionally substituted monovalent hydrocarbon group, etc.; and each of m and n is an integer of 1 or greater provided that they satisfy the relationship m+n?20).
    Type: Application
    Filed: April 9, 2008
    Publication date: September 16, 2010
    Applicant: Nissan Chemical Industries, Ltd.
    Inventors: Tomohisa Yamada, Takuji Yoshimoto
  • Patent number: 7771842
    Abstract: By using a charge-transporting thin film which is made of charge-transporting varnish containing, as an electron-acceptor material, a 1,4-benzodioxane sulfonic acid compound represented by the formula (1) below especially in an OLED device or a PLED device, there can be realized excellent EL device characteristics such as low driving voltage, high luminous efficiency and long life.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: August 10, 2010
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Takuji Yoshimoto, Tomohisa Yamada
  • Patent number: 7737248
    Abstract: Using a charge transporting organic compound made of a polymer whose polymer main chain has a fluorene derivative, which is substituted with an amino group having an aromatic ring or heterocyclic ring, connected thereto at the 9 position thereof, e.g. a compound represented by the following formula (1), in a charge transporting thin film, the resulting organic EL element ensures low voltage drive, a high luminance, a very long life and no imperfections.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: June 15, 2010
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Tomohisa Yamada, Takuji Yoshimoto, Go Ono
  • Publication number: 20090269688
    Abstract: A charge-transporting varnish comprising a phenylamino-N,N?-diphenylquinonediimine derivative represented by the formula (1) as a charge-transporting substance. It becomes possible to provide a charge-transporting varnish comprising an oxidized oligoaniline, which has a high solubility in various organic solvents and also has a good filtration property because the varnish has no aggregation property. (wherein R1 represents a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group; and R2 to R19 independently represent a hydrogen atom, a hydroxyl group, an amino group, a silanol group, a thiol group, a carboxyl group, a phosphoric acid group, a phosphate ester group, an ester group, a thioester group, an amide group, a nitro group, a substituted or unsubstituted monovalent hydrocarbon group, an organooxy group, an organoamino group, an organosilyl group, an organothio group, an acyl group, a sulfone group or a halogen atom.
    Type: Application
    Filed: July 17, 2007
    Publication date: October 29, 2009
    Inventors: Takuji Yoshimoto, Tomohisa Yamada, Taku Kato
  • Publication number: 20090058269
    Abstract: A charge-transporting varnish comprising a solution or dispersion of at least one charge-transporting polymer comprising repeating units represented by the general formula (1) in at least one solvent, wherein the polymer is at least one polymer selected from among polyimide precursors having number-average molecular weights of 1,000 to 100,000 and polyimides obtained by cyclodehydration of the precursors; a charge-transporting varnish comprising a solution or dispersion in at least one solvent of both a charge-transporting substance consisting of a charge-transporting oligoaniline derivative having a number-average molecular weight of 250 to 5,000 or a charge-transporting organic material consisting of the substance and a charge-receiving dopant and at least one charge-transporting polymer comprising repeating units represented by the general formula (1); charge-transporting thin films formed by using the varnishes; and organic electroluminescent devices provided with the thin films: (1) wherein Ar1 to Ar3 ar
    Type: Application
    Filed: May 29, 2006
    Publication date: March 5, 2009
    Inventors: Go Ono, Tomohisa Yamada
  • Patent number: 7358660
    Abstract: An organic electroluminescence device capable of solving the problem of realization of low-voltage driving and high luminance which is important for the prolongation of the life thereof, the organic electroluminescence device comprising a luminous layer composed of a single or a plurality of organic compound thin films interposed between a positive electrode and a negative electrode, characterized in that at least one layer containing a compound having carbenium ion is arranged therein; and a charge transport material (e.g., hole transport material for the organic electroluminescence device) characterized in that a compound having carbenium ion is contained therein.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: April 15, 2008
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Tomohisa Yamada, Takuji Yoshimoto
  • Publication number: 20070105030
    Abstract: By using a charge-transporting thin film which is made of charge-transporting varnish containing, as an electron-acceptor material, a 1,4-benzodioxane sulfonic acid compound represented by the formula (1) below especially in an OLED device or a PLED device, there can be realized excellent EL device characteristics such as low driving voltage, high luminous efficiency and long life.
    Type: Application
    Filed: June 23, 2004
    Publication date: May 10, 2007
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Takuji Yoshimoto, Tomohisa Yamada
  • Publication number: 20070031699
    Abstract: Using a charge transporting organic compound made of a polymer whose polymer main chain has a fluorene derivative, which is substituted with an amino group having an aromatic ring or heterocyclic ring, connected thereto at the 9 position thereof, e.g. a compound represented by the following formula (1), in a charge transporting thin film, the resulting organic EL element ensures low voltage drive, a high luminance, a very long life and no imperfections.
    Type: Application
    Filed: October 29, 2004
    Publication date: February 8, 2007
    Inventors: Tomohisa Yamada, Go Ono
  • Patent number: 7144607
    Abstract: A polyimide-containing liquid crystal alignment treating agent having a structure of the formula (I) incorporated therein, wherein Q is a single bond or a divalent organic group, R1 to R4 represent aromatic groups, and R1 to R4 may be the same as, or different from, one another.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: December 5, 2006
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Tomohisa Yamada, Hiroyoshi Fukuro, Hideyuki Endo
  • Publication number: 20050221117
    Abstract: An organic electroluminescence device capable of solving the problem of realization of low-voltage driving and high luminance which is important for the prolongation of the life thereof, the organic electroluminescence device comprising a luminous layer composed of a single or a plurality of organic compound thin films interposed between a positive electrode and a negative electrode, characterized in that at least one layer containing a compound having carbenium ion is arranged therein; and a charge transport material (e.g., hole transport material for the organic electroluminescence device) characterized in that a compound having carbenium ion is contained therein.
    Type: Application
    Filed: April 28, 2003
    Publication date: October 6, 2005
    Inventors: Tomohisa Yamada, Takuji Yoshimoto
  • Publication number: 20040167314
    Abstract: A polyimide-containing liquid crystal alignment treating agent having a structure of the formula (I) incorporated therein, 1
    Type: Application
    Filed: December 12, 2003
    Publication date: August 26, 2004
    Inventors: Tomohisa Yamada, Hiroyoshi Fukuro, Hideyuki Endo