Patents by Inventor Tomoya Nakatani

Tomoya Nakatani 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: 20210020193
    Abstract: Provided is a precursor of a current-perpendicular-to-plane giant magnetoresistive element having a laminated structure of ferromagnetic metal layer/nonmagnetic metal layer/ferromagnetic metal layer, the precursor having a nonmagnetic intermediate layer containing a non-magnetic metal and an oxide in a predetermined ratio such that the distribution thereof is nearly uniform at the atomic level. Also provided is a current-perpendicular-to-plane giant magnetoresistive element having a current-confinement structure (CCP) which has: a current confinement structure region made of a conductive alloy and obtained by heat-treating a laminated structure of a ferromagnetic metal layer and a nonmagnetic intermediate layer at a predetermined temperature; and a high-resistance metal alloy region containing an oxide and surrounding the current confinement structure region.
    Type: Application
    Filed: February 26, 2019
    Publication date: January 21, 2021
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Tomoya NAKATANI, Taisuke SASAKI, Takao FURUBAYASHI, Kazuhiro HONO
  • Patent number: 10818843
    Abstract: A polymer compound comprising a constitutional unit represented by the following formula (1) and a constitutional unit represented by the following formula (X) and/or a constitutional unit represented by the following formula (Y), wherein the content of the hydroxyl groups contained in the polymer compound is less than 0.02 mol %: Ar1??(1) [wherein, Ar1 represents an arylene group and this group optionally has a substituent.] [wherein, aX1 and aX2 each independently represent an integer of 0 or more. ArX1 and ArX3 each independently represent an arylene group or a divalent heterocyclic group and these groups each optionally have a substituent. ArX2 and ArX4 each independently represent an arylene group, a divalent heterocyclic group or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are bonded directly to each other, and these groups each optionally have a substituent.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: October 27, 2020
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hidenobu Kakimoto, Nozomi Masui, Tomoya Nakatani, Noriyuki Hida, Yasutaka Yatsumonji
  • Patent number: 9976078
    Abstract: This invention provides a luminescent composition comprising a polymer and at least one phosphorescent compound, characterized in that the electronic conjunction chain coefficient Ze of the main repeating minimum unit of the polymer falls within the following range: 0<Ze?2.00 (1) wherein the electronic conjunction chain coefficient Ze is defined as a slope obtained by linear approximation of function Tm=Tm (1/ne) by the least square method wherein ne represents the number of conjugated electrons contained in repeating minimum units; and Tm represents, for m-mer obtained by bonding repeating minimum units, the lowest triplet excitation energy in each m-mer when the number m is varied from 1 to 3 by one by one. Here in the number of conjugated electrons, only the conjugated electrons present in the main chain of the repeating minimum units are taken into consideration, provided that, when there are a plurality of main repeating minimum units, the minimum Ze is used.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: May 22, 2018
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuhiko Akino, Chizu Sekine, Satoshi Mikami, Tomoya Nakatani
  • Patent number: 9780308
    Abstract: A composition comprising (1) a first crosslinkable polymer compound having an aromatic conjugated repeating unit and a crosslinkable group and having at least one of a light emitting property and charge transportability, and (2) a second crosslinkable polymer compound having an aromatic conjugated repeating unit and a crosslinkable group at least one of which is different from the aromatic conjugated repeating unit in the first crosslinkable polymer compound and the crosslinkable group in the first crosslinkable polymer compound, and having at least one of a light emitting property and charge transportability, wherein at least one of the first crosslinkable polymer compound and the second crosslinkable polymer compound has a crosslinkable group represented by the following formula (Z-3) or (Z-4): in the formulae, Rc represents a hydrogen atom, or a substituent such as an unsubstituted or substituted alkyl group or the like, the plurality of Rc moieties may be the same or different.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: October 3, 2017
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Keiko Hirano, Tomoya Nakatani, Shigeru Sasaki
  • Publication number: 20170237012
    Abstract: An ink composition containing a P-type semiconductor material, an N-type semiconductor material and two or more solvents including a first solvent and a second solvent, wherein the total amount of the first solvent and the second solvent is 70% by weight or more with respect to 100% by weight of all the solvents contained in the ink composition; the boiling point of the first solvent is lower than the boiling point of the second solvent; the boiling point of the first solvent is 120° C. or more and 400° C. or less; and the hydrogen bond Hansen solubility parameter H1 (MPa0.5) of the first solvent and the hydrogen bond Hansen solubility parameter H2 (MPa0.5) of the second solvent are in the relation of 0.5?(H2?H1)?5.0.
    Type: Application
    Filed: November 6, 2015
    Publication date: August 17, 2017
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Xiaoxiao SHEN, Tomoya NAKATANI
  • Patent number: 9508373
    Abstract: Provided are an element structure in which a magnetic layer has a high magnetic anisotropy constant and saturated magnetization properties in a thickness of 1.5 nm or less, and a magnetic device that uses the element structure. A BCC metal nitride/CoFeB/MgO film structure that uses a nitride of a BCC metal as a seed layer is fabricated. The nitride amount in the BCC metal nitride is preferably less than 60% in terms of volume ratio based on 100% BCC metal. It is thereby possible to readily obtain a perpendicularly magnetized film having the magnetic properties that the perpendicular magnetic anisotropy is 0.1×106 erg/cm3 or more and the saturated magnetization is 200 emu/cm3 or more, even when the thickness of the magnetic layer is 0.3 nm or more and 1.5 nm or less.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: November 29, 2016
    Assignee: National Institute for Materials Science
    Inventors: Masamitsu Hayashi, Sinha Jaivardhan, Masaya Kodzuka, Tomoya Nakatani, Yukiko Takahashi, Takao Furubayashi, Seiji Mitani, Kazuhiro Hono
  • Publication number: 20160307587
    Abstract: Embodiments disclosed herein generally relate to a magnetic head having an amorphous ferromagnetic reference layer. The ferromagnetic reference layer may have amorphous structure as a result of an amorphous ferromagnetic underlayer that the ferromagnetic reference layer is deposited thereon. The amorphous ferromagnetic reference layer enhances magnetoresistance, leading to an improved magnetic head.
    Type: Application
    Filed: June 30, 2016
    Publication date: October 20, 2016
    Inventors: Jeffrey Robinson CHILDRESS, Young-Suk CHOI, Tomoya NAKATANI, John C. READ
  • Patent number: 9412399
    Abstract: Embodiments disclosed herein generally relate to a magnetic head having an amorphous ferromagnetic reference layer. The ferromagnetic reference layer may have amorphous structure as a result of an amorphous ferromagnetic underlayer that the ferromagnetic reference layer is deposited thereon. The amorphous ferromagnetic reference layer enhances magnetoresistance, leading to an improved magnetic head.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: August 9, 2016
    Assignee: HGST Netherlands B.V.
    Inventors: Jeffrey Robinson Childress, Young-Suk Choi, Tomoya Nakatani, John Creighton Read
  • Publication number: 20160211452
    Abstract: A polymer compound comprising a constitutional unit represented by the following formula (1) and a constitutional unit represented by the following formula (X) and/or a constitutional unit represented by the following formula (Y), wherein the content of the hydroxyl groups contained in the polymer compound is less than 0.02 mol %: ?Ar1???(1) wherein Ar1 represents an arylene group and this group optionally has a substituent, wherein, ArY1 represents an arylene group, a divalent heterocyclic group or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are bonded directly to each other, and these groups each optionally have a substituent.
    Type: Application
    Filed: August 29, 2014
    Publication date: July 21, 2016
    Inventors: Hidenobu KAKIMOTO, Nozomi MASUI, Tomoya NAKATANI, Noriyuki HIDA, Yasutaka YATSUMONJI
  • Publication number: 20160186051
    Abstract: This invention provides a luminescent composition comprising a polymer and at least one phosphorescent compound, characterized in that the electronic conjunction chain coefficient Ze of the main repeating minimum unit of the polymer falls within the following range: 0<Ze?2.00 (1) wherein the electronic conjunction chain coefficient Ze is defined as a slope obtained by linear approximation of function Tm=Tm (1/ne) by the least square method wherein ne represents the number of conjugated electrons contained in repeating minimum units; and Tm represents, for m-mer obtained by bonding repeating minimum units, the lowest triplet excitation energy in each m-mer when the number m is varied from 1 to 3 by one by one. Here in the number of conjugated electrons, only the conjugated electrons present in the main chain of the repeating minimum units are taken into consideration, provided that, when there are a plurality of main repeating minimum units, the minimum Ze is used.
    Type: Application
    Filed: March 9, 2016
    Publication date: June 30, 2016
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuhiko AKINO, Chizu SEKINE, Satoshi MIKAMI, Tomoya NAKATANI
  • Patent number: 9315723
    Abstract: This invention provides a luminescent composition comprising a polymer and at least one phosphorescent compound, characterized in that the electronic conjunction chain coefficient Ze of the main repeating minimum unit of the polymer falls within the following range: 0<Ze?2.00 (1) wherein the electronic conjunction chain coefficient Ze is defined as a slope obtained by linear approximation of function Tm=Tm(1/ne) by the least square method wherein ne represents the number of conjugated electrons contained in repeating minimum units; and Tm represents, for m-mer obtained by bonding repeating minimum units, the lowest triplet excitation energy in each m-mer when the number m is varied from 1 to 3 by one by one. Here in the number of conjugated electrons, only the conjugated electrons present in the main chain of the repeating minimum units are taken into consideration, provided that, when there are a plurality of main repeating minimum units, the minimum Ze is used.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: April 19, 2016
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuhiko Akino, Chizu Sekine, Satoshi Mikami, Tomoya Nakatani
  • Publication number: 20160078888
    Abstract: Embodiments disclosed herein generally relate to a magnetic head having an amorphous ferromagnetic reference layer. The ferromagnetic reference layer may have amorphous structure as a result of an amorphous ferromagnetic underlayer that the ferromagnetic reference layer is deposited thereon. The amorphous ferromagnetic reference layer enhances magnetoresistance, leading to an improved magnetic head.
    Type: Application
    Filed: September 17, 2014
    Publication date: March 17, 2016
    Inventors: Jeffrey Robinson CHILDRESS, Young-Suk CHOI, Tomoya NAKATANI, John Creighton READ
  • Patent number: 9047891
    Abstract: A current-perpendicular-to-the-plane giant magnetoresistance (CPP-GMR) sensor has a spacer layer that includes electrically conductive indium-zinc-oxide (IZO), i.e., In2O3 plus ZnO where the ZnO is present between 5-30 weight percent. The spacer layer may include a protective sublayer, like a layer of Ag, below the IZO layer to prevent oxidation of the reference layer from the oxygen in the IZO layer. The spacer layer includes a top layer consisting essentially of Zn located above the IZO layer below the free layer. Measurements from a large number of CPP-GMR sensors with spacer layers of Ag(9 ?)/IZO(20 ?)/Zn(8 ?) show ?R/R values of about 15-17% and acceptable RA values of around 100 m?·?m2.
    Type: Grant
    Filed: May 3, 2014
    Date of Patent: June 2, 2015
    Assignee: HGST Netherlands B.V.
    Inventors: Jeffrey R. Childress, Tomoya Nakatani
  • Publication number: 20150132609
    Abstract: Provided are an element structure in which a magnetic layer has a high magnetic anisotropy constant and saturated magnetization properties in a thickness of 1.5 nm or less, and a magnetic device that uses the element structure. A BCC metal nitride/CoFeB/MgO film structure that uses a nitride of a BCC metal as a seed layer is fabricated. The nitride amount in the BCC metal nitride is preferably less than 60% in terms of volume ratio based on 100% BCC metal. It is thereby possible to readily obtain a perpendicularly magnetized film having the magnetic properties that the perpendicular magnetic anisotropy is 0.1×106 erg/cm3 or more and the saturated magnetization is 200 emu/cm3 or more, even when the thickness of the magnetic layer is 0.3 nm or more and 1.5 nm or less.
    Type: Application
    Filed: March 22, 2013
    Publication date: May 14, 2015
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Masamitsu Hayashi, Sinha Jaivardhan, Masaya Kodzuka, Tomoya Nakatani, Yukiko Takahashi, Takao Furubayashi, Seiji Mitani, Kazuhiro Hono
  • Patent number: 8999523
    Abstract: Disclosed is a compound containing a divalent group represented by formula (I).
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: April 7, 2015
    Assignee: Sumitomo Chemical Company, Limited
    Inventor: Tomoya Nakatani
  • Patent number: 8993124
    Abstract: A polymer compound including: the repeating unit shown in the following formula (I) (wherein: Ar1 represents an arylene group, a divalent heterocyclic group, or a divalent aromatic amine; J1 and J2 each represent a direct bond, an alkylene group, or a phenylene group, and X1 represents an oxygen atom or a sulfur atom; i is an integer from 0 to 3; j is 0 or 1; m is 1 or 2; and R1 represents a hydrogen atom, an alkyl group, an alkoxy group, or the like) and the repeating unit shown in the following formula (II) (wherein: Ar2 represents a fluorene-diyl group; J3 and J4 each represent a direct bond, an alkylene group, or a phenylene group; X2 represents an oxygen atom or a sulfur atom; k is an integer from 0 to 3; l is 0 or 1; and n is 1 or 2).
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: March 31, 2015
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tomoya Nakatani, Keiko Kawaguchi
  • Patent number: 8877449
    Abstract: The present invention provides markers that can selectively distinguish pancreatic progenitor cells. The present invention also provides methods for distinguishing pancreatic progenitor cells by using the markers as an indicator, and reagents to be used in the methods. The present inventors successfully identified the surface marker Nephrin-like 3 (Neph3) which is specifically expressed in pancreatic progenitor cells, and isolated pancreatic progenitor cells using the marker as an indicator or such. Viable pancreatic progenitor cells can be selected by using Neph3 as an indicator without using translated products and transcripts of any foreign genes. The marker is useful in preparing and identifying pancreatic progenitor cells which are applied to regenerative medicine or such for treatment of pancreatic diseases.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: November 4, 2014
    Assignee: Eisai R&D Management Co., Ltd.
    Inventors: Yuichi Ono, Tomoya Nakatani, Yasuko Nakagawa
  • Publication number: 20140183414
    Abstract: A polymer compound comprising a repeating unit represented by the formula (1): wherein, E1, E2, E3 and E4 represent each independently an aryl group, a mono-valent heterocyclic group or the like, a, b, c, d and e represent each independently 1 or 2, and f represents an integer of 0 to 3, and when f=0, then, 5?a+b+c+e?8 and at least one of b and c is 2, and when there are a plurality of d, these may be the same or different, m, n, o, p, q and l represent each independently an integer of 0 to 4, and when there are a plurality of m, n, o, p and q, these may be the same or different, respectively, j and k represent each independently an integer of 0 to 5.
    Type: Application
    Filed: August 10, 2012
    Publication date: July 3, 2014
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yoshikazu Umemoto, Tomoya Nakatani
  • Patent number: 8580523
    Abstract: The present invention identified Lmx1a genes, which are expressed in dopaminergic neurons at all differentiation stages, from proliferating dopaminergic neuron progenitor cells before cell cycle exit to cells after cell cycle exit. Lmx1a expression in cells can be used as an indicator when selecting cells suitable for transplantation therapy for neurodegenerative diseases such as Parkinson's disease, and is useful as a marker for screening agents involved in the induction of dopaminergic neuron differentiation.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: November 12, 2013
    Assignee: Eisai R&D Management Co., Ltd.
    Inventors: Yuichi Ono, Yasuko Nakagawa, Tomoya Nakatani
  • Patent number: 8384066
    Abstract: Disclosed is a polymer light-emitting device having a light-emitting layer arranged between an anode and a cathode, and a hole transport layer arranged between the light-emitting layer and the anode. This polymer light-emitting device is characterized in that the hole transport layer is a layer containing a polymer compound which contains a repeating unit represented by the general formula (I) below, a repeating unit represented by the general formula (II) below and a repeating unit represented by the general formula (III) below.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: February 26, 2013
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tomoya Nakatani, Hidenobu Kakimoto