Patents by Inventor Keiichi Seki

Keiichi Seki 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: 20240021802
    Abstract: The present invention has been made in view of such background arts, and an object thereof is to provide a coated carbon material that can provide a secondary battery not only maintaining capacity, but also having excellent initial efficiency, as compared with a conventional art, and as a result, to provide a high-performance secondary battery. A coated carbon material where a carbon material is coated with a coating film, in which the coating film includes at least one selected from the following compound (X) and a crosslinked product of the following compounds (Y): (X): an acetoacetyl group-containing resin, and (Y): a polyvinyl alcohol-based resin and a silicon element-containing compound.
    Type: Application
    Filed: September 28, 2023
    Publication date: January 18, 2024
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Tatsuya HASEGAWA, Keiji SHITO, Hanako KATO, Kazunori MUKUNOKI, Hiroki HATAKEYAMA, Keiichi SEKI
  • Patent number: 9514552
    Abstract: Disclosed are an information processing apparatus etc., which can display an operation object while switching according to an operation unit that is operated by a function that is in operation, includes a conversion unit that, when a switch from an operation performed by a first function which detects an operation performed by a first operation unit to an operation performed by a second function which detects an operation performed by a second operation unit, converts a description regarding an operation object related to the first operation unit in at least one description to display on a display unit that operates by the first function into a description regarding the operation object related to the second operation unit, and a drawing unit that displays the description obtained by conversion performed by the conversion unit on a display unit that operates by the second function.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: December 6, 2016
    Assignee: NEC CORPORATION
    Inventors: Keiichi Seki, Kiyoto Sato
  • Publication number: 20150279068
    Abstract: Disclosed are an information processing apparatus etc., which can display an operation object while switching according to an operation unit that is operated by a function that is in operation, includes a conversion unit that, when a switch from an operation performed by a first function which detects an operation performed by a first operation unit to an operation performed by a second function which detects an operation performed by a second operation unit, converts a description regarding an operation object related to the first operation unit in at least one description to display on a display unit that operates by the first function into a description regarding the operation object related to the second operation unit, and a drawing unit that displays the description obtained by conversion performed by the conversion unit on a display unit that operates by the second function.
    Type: Application
    Filed: March 26, 2015
    Publication date: October 1, 2015
    Inventors: Keiichi SEKI, Kiyoto SATO
  • Patent number: 8828272
    Abstract: A phosphor includes a crystal phase of a formula (Ln,Ca,Ce)3+?Si6N11. In this formula, ? is from ?0.1 to 1.5, inclusive. When an object color of the phosphor is expressed by the L*a*b* color system, the value of (a*2+b*2)1/2 satisfies 71?(a*2+b*2)1/2. Also in the formula, Ln is La, Gd, Lu, Y, Sc, or any combination of these. When the phosphor is excited with light having a wavelength of 455 nm, it emits a color wherein x is from 0.400 to 0.570 inclusive, and y is from 0.420 to 0.590, inclusive, as expressed in the CIE standard coordinate system.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: September 9, 2014
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Takatoshi Seto, Naoto Kijima, Keiichi Seki, Ryuji Adachi, Hiroyasu Yamada, Tatsuya Inoue
  • Patent number: 8801970
    Abstract: A nitride phosphor contains europium as an activating element and strontium, or strontium and calcium, as divalent metal elements. The phosphor further includes aluminum and silicon. Of the europium in the phosphor, at least 85% is in the form of Eu2+. The phosphor has a peak emission wavelength of from 590 nm to 650 nm. A phosphorescent body that includes the phosphor can be suitable for converting a wavelength of at least a portion of light emitted from an excitation light source in a light-emitting device.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 12, 2014
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hiromu Watanabe, Masumi Itou, Keiichi Seki, Hiroshi Wada, Motoyuki Shigeiwa, Kaoru Terada, Naoto Kijima
  • Publication number: 20140042898
    Abstract: To provide a yellow to orange phosphor which has high luminance and excellent temperature characteristics and which also has high luminance when mixed with a phosphor of a different color. A phosphor containing a crystal phase represented by the following formula [I], wherein when its object color is expressed by the L*a*b* color system, the values of a*, b* and (a*2+b*2)1/2 satisfy ?20?a*??2, 71?b* and 71?(a*2+b*2)1/2, respectively: R3?x?y?z+w2MzA1.
    Type: Application
    Filed: October 18, 2013
    Publication date: February 13, 2014
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Takatoshi Seto, Naoto Kijima, Keiichi Seki, Ryuji Adachi, Hiroyasu Yamada, Tatsuya Inoue
  • Patent number: 8636920
    Abstract: A method for industrially producing a phosphor with high performance, in particular, high brightness. Also disclosed is a nitrogen-containing alloy and an alloy powder useful for producing the high performance phosphor. The method for producing the phosphor includes heating a raw material for a phosphor in whole or in part comprising an alloy containing two or more different metal elements under a nitrogen-containing atmosphere and heating the raw material for a phosphor under conditions such that the temperature change per minute is 50° C. or lower. Using an alloy as all or part of the raw material constituting the phosphor precursor, it is possible to suppress the rapid progression of nitridation during heat treatment and industrially produce a phosphor with high performance, in particular, high brightness.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: January 28, 2014
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Naoto Kijima, Hiromu Watanabe, Keiichi Seki
  • Patent number: 8574459
    Abstract: To provide a yellow to orange phosphor which has high luminance and excellent temperature characteristics and which also has high luminance when mixed with a phosphor of a different color. A phosphor containing a crystal phase represented by the following formula [I], wherein when its object color is expressed by the L*a*b* color system, the values of a*, b* and (a*2+b*2)1/2 satisfy ?20?a*??2, 71?b* and 71?(a*2+b*2)1/2, respectively: R3?x?y?z+w2MzA1.5x+y?w2Si6?w1?w2Alw1+w2Oy+w1N11?y?w1??[I].
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: November 5, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Takatoshi Seto, Naoto Kijima, Keiichi Seki, Ryuji Adachi, Hiroyasu Yamada, Tatsuya Inoue
  • Patent number: 8460580
    Abstract: The present invention relates to a phosphor comprising a nitride or an oxynitride, comprising an X-ray powder diffraction pattern comprising at least one Region having at least one peak with an intensity ratio I of 8% or less, the X-ray powder diffraction pattern measured in the 2? range from 10° to 60° using a CuK? line (1.54184 {acute over (?)}), wherein the Region is the 2? range from 41.5° to 47°, the intensity of each peak is a value obtained after background correction, and the intensity ratio I is defined by the formula (Ip×100)/Imax (%), where Imax represents the height of the most intense peak present in the 2? range from 34° to 37° and Ip represents the height of each peak.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: June 11, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hiromu Watanabe, Masumi Itou, Keiichi Seki, Hiroshi Wada, Motoyuki Shigeiwa, Kaoru Terada, Naoto Kijima
  • Publication number: 20120256533
    Abstract: To provide a yellow to orange phosphor which has high luminance and excellent temperature characteristics and which also has high luminance when mixed with a phosphor of a different color. A phosphor containing a crystal phase represented by the following formula [I], wherein when its object color is expressed by the L*a*b* color system, the values of a*, b* and (a*2+b*2)1/2 satisfy ?20?a*??2, 71?b* and 71?(a*2+b*2)1/2, respectively: R3?x?y?z+w2MzA1.
    Type: Application
    Filed: September 23, 2011
    Publication date: October 11, 2012
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Takatoshi Seto, Naoto Kijima, Keiichi Seki, Ryuji Adachi, Hiroyasu Yamada, Tatsuya Inoue
  • Patent number: 8277687
    Abstract: The present invention relates to a phosphor that satisfies requirements (1) to (3): (1) the phosphor satisfies Formula [2] and/or Formula [3]: 85?{R455(125)/R455(25)}×100?110??[2] 92?{R405(100)/R405(25)}×100?110??[3] wherein R455(125) represents an emission peak intensity when the phosphor is excited by light having a peak wavelength of 455 nm at 125° C., (2) the emission peak wavelength is in the range of 570 nm to 680 nm, and (3) the full width at half maximum of an emission peak is 90 nm or less. The phosphor of the present invention has a high luminous efficiency and emits light of orange to red with high luminance. The use of the phosphor makes it possible to produce a light-emitting device, an illumination apparatus, and an image display, having a high efficiency and excellent color rendering properties.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: October 2, 2012
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tomoko Takahashi, Nobuhiro Kodama, Yasuo Shimomura, Naoto Kijima, Tomoyuki Kurushima, Takashi Hase, Eiji Hattori, Kouichi Adachi, Keiichi Seki, Yutaka Mori
  • Publication number: 20120171360
    Abstract: A method for industrially producing a phosphor with high performance, in particular, high brightness. Also disclosed is a nitrogen-containing alloy and an alloy powder useful for producing the high performance phosphor. The method for producing the phosphor includes heating a raw material for a phosphor in whole or in part comprising an alloy containing two or more different metal elements under a nitrogen-containing atmosphere and heating the raw material for a phosphor under conditions such that the temperature change per minute is 50° C. or lower. Using an alloy as all or part of the raw material constituting the phosphor precursor, it is possible to suppress the rapid progression of nitridation during heat treatment and industrially produce a phosphor with high performance, in particular, high brightness.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 5, 2012
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Naoto KIJIMA, Hiromu Watanabe, Keiichi Seki
  • Patent number: 8123980
    Abstract: There is provided a method for industrially producing a phosphor with high performance, in particular, high brightness. There is also provided a nitrogen-containing alloy and an alloy powder that can be used for the production method. A method for producing a phosphor includes a step of heating a raw material for the phosphor under a nitrogen-containing atmosphere, in which an alloy containing two or more different metal elements constituting the phosphor is used as the whole or part of the raw material for the phosphor, and in the heating step, the heating is performed under conditions such that the temperature change per minute is 50° C. or lower. It is possible to suppress the rapid progress of a nitridation reaction in heat treatment in producing the phosphor using an alloy for a phosphor precursor as the whole or part of the raw material, thereby industrially producing the phosphor with high performance, in particular, high brightness.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: February 28, 2012
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Naoto Kijima, Hiromu Watanabe, Keiichi Seki
  • Patent number: 7943719
    Abstract: Curable polyorganosiloxanes are provided that cure in the absence of a hydrosilylation catalyst. The cured polyorganosiloxanes have increased stability and can be used as encapsulation resin is at a temperature far lower than 300° C., have excellent light transmission properties (colorless transparency. in a wavelength region of from ultraviolet light to visible light, light resistance, heat resistance, resistance to moist heat and UV resistance, and do not generate cracks and peeling even in use over a long period of time.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: May 17, 2011
    Assignees: The Regents of the University of California;, Mitsubishi Chemical Company
    Inventors: Craig J. Hawker, Rosette G. Guino, Keiichi Seki, Kenichi Takizawa, Yutaka Moti
  • Patent number: 7824573
    Abstract: The present invention provides an alloy powder that is a material for producing inorganic functional materials such as phosphors, a phosphor with high brightness, and a method for producing the phosphor. An alloy powder for an inorganic functional material precursor contains at least one metal element and at least one activating element M1 and has a weight-average median diameter D50 of 5 ?m to 40 ?m. A method for producing a phosphor includes a step of heating an alloy, containing two or more metal elements for forming the phosphor, in a nitrogen-containing atmosphere.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: November 2, 2010
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hiromu Watanabe, Masumi Itou, Keiichi Seki, Hiroshi Wada, Motoyuki Shigeiwa, Kaoru Terada, Naoto Kijima
  • Patent number: 7732553
    Abstract: A process is provided for producing curable polyorganosiloxanes where noble metal oxides are used as hydrosilylation catalysts. The noble metals can be used in solid granular form or as part of a fixed bed, and do not form part of the final curable composition or cured product. The cured polyorganosiloxanes have increased stability and can be used as encapsulation resins at a temperature far lower than 300° C., have excellent light transmission properties (colorless transparency) in a wavelength region of from ultraviolet light to visible light, light resistance, heat resistance, resistance to moist heat and UV resistance, and do not generate cracks and peeling even in use over a long period of time.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: June 8, 2010
    Assignee: The Regents of the University of California
    Inventors: Craig J. Hawker, Rosette G. Guino, Keiichi Seki, Kenichi Takizawa, Yutaka Moti
  • Publication number: 20100052515
    Abstract: The present invention relates to a phosphor comprising a nitride or an oxynitride, comprising an X-ray powder diffraction pattern comprising at least one Region having at least one peak with an intensity ratio I of 8% or less, the X-ray powder diffraction pattern measured in the 2? range from 10° to 60° using a CuK? line (1.54184 {acute over (?)}), wherein the Region is the 2? range from 41.5° to 47°, the intensity of each peak is a value obtained after background correction, and the intensity ratio I is defined by the formula (Ip×100)/Imax (%), where Imax represents the height of the most intense peak present in the 2? range from 34° to 37° and Ip represents the height of each peak.
    Type: Application
    Filed: November 9, 2009
    Publication date: March 4, 2010
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Hiromu WATANABE, Masumi Itou, Keiichi Seki, Hiroshi Wada, Motoyuki Shigeiwa, Kaoru Terada, Naoto Kijima
  • Publication number: 20090221783
    Abstract: Curable polyorganosiloxanes are provided that cure in the absence of a hydrosilylation catalyst. The cured polyorganosiloxanes have increased stability and can be used as encapsulation resin is at a temperature far lower than 300° C., have excellent light transmission properties (colorless transparency) in a wavelength region of from ultraviolet light to visible light, light resistance, heat resistance, resistance to moist heat and UV resistance, and do not generate cracks and peeling even in use over a long period of time.
    Type: Application
    Filed: February 28, 2008
    Publication date: September 3, 2009
    Inventors: Craig J. Hawker, Rosette G. Guino, Keiichi Seki, Kenichi Takizawa, Yutaka Moti
  • Publication number: 20090140205
    Abstract: There is provided a method for industrially producing a phosphor with high performance, in particular, high brightness. There is also provided a nitrogen-containing alloy and an alloy powder that can be used for the production method. A method for producing a phosphor includes a step of heating a raw material for the phosphor under a nitrogen-containing atmosphere, in which an alloy containing two or more different metal elements constituting the phosphor is used as the whole or part of the raw material for the phosphor, and in the heating step, the heating is performed under conditions such that the temperature change per minute is 50° C. or lower. It is possible to suppress the rapid progress of a nitridation reaction in heat treatment in producing the phosphor using an alloy for a phosphor precursor as the whole or part of the raw material, thereby industrially producing the phosphor with high performance, in particular, high brightness.
    Type: Application
    Filed: May 18, 2007
    Publication date: June 4, 2009
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Naoto Kijima, Hiromu Watanabe, Keiichi Seki
  • Publication number: 20090134775
    Abstract: The present invention provides an alloy powder that is a material for producing inorganic functional materials such as phosphors, a phosphor with high brightness, and a method for producing the phosphor. An alloy powder for an inorganic functional material precursor contains at least one metal element and at least one activating element M1 and has a weight-average median diameter D50 of 5 ?m to 40 ?m. A method for producing a phosphor includes a step of heating an alloy, containing two or more metal elements for forming the phosphor, in a nitrogen-containing atmosphere.
    Type: Application
    Filed: March 31, 2006
    Publication date: May 28, 2009
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Hiromu Watanabe, Masumi Itou, Keiichi Seki, Hiroshi Wada, Motoyuki Shigeiwa, Kaoru Terada, Naoto Kijima