Patents by Inventor Mamoru Mitomo

Mamoru Mitomo 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: 20190225986
    Abstract: The present inventors successfully introduced genes into stem cells of airway epithelial tissues using simian immunodeficiency virus vectors pseudotyped with F and HN, which are envelope glycoproteins of Sendai virus. Gene transfer into airway epithelial tissue stem cells using a vector of the present invention is useful for gene therapy of genetic respiratory diseases such as cystic fibrosis. Furthermore, it is possible to select respiratory organs such as the lungs as production tissues for providing proteins that are deficient due to genetic diseases.
    Type: Application
    Filed: November 30, 2018
    Publication date: July 25, 2019
    Inventors: Katsuyuki Mitomo, Makoto Inoue, Hitoshi Iwasaki, Mamoru Hasegawa, Eric W. Alton, Uta Griesenbach
  • Patent number: 9677000
    Abstract: A fluorophor includes: ?-type sialon crystal which is expressed by a general formula: (Lix1, Eux2)(Si12?(m+n)Alm+n)(OnN16?n), wherein x1 is an amount of solid solution of Li in a sialon unit cell, and x2 is an amount of solid solution of Eu in the sialon unit cell, wherein the parameters x1, x2, m, and n satisfy: 1.6?x1?2.4 (1), 0.001?x2?0.4 (2), 1.8?m?2.4 (3), 0.8?n?1.2 (4), wherein the ?-type sialon crystal emits fluorescence with a peak in a wavelength region of from 550 nm to 575 nm upon irradiation of an excitation source.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: June 13, 2017
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Naoto Hirosaki, Rong-Jun Xie, Mamoru Mitomo
  • Publication number: 20150083966
    Abstract: A fluorophor includes: ?-type sialon crystal which is expressed by a general formula: (Lix1, Eux2) (Si12?(m+n)Alm+n)(OnN16?n), wherein x1 is an amount of solid solution of Li in a sialon unit cell, and x2 is an amount of solid solution of Eu in the sialon unit cell, wherein the parameters x1, x2, m, and n satisfy: 1.6?x1?2.4 (1), 0.001?x2?0.4 (2), 1.8?m?2.4 (3), 0.8?n?1.2 (4), wherein the ?-type sialon crystal emits fluorescence with a peak in a wavelength region of from 550 nm to 575 nm upon irradiation of an excitation source.
    Type: Application
    Filed: October 6, 2014
    Publication date: March 26, 2015
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Naoto HIROSAKI, Rong-Jun XIE, Mamoru MITOMO
  • Patent number: 8883039
    Abstract: A fluorophor which comprises as a main component, an ? type sialon crystal containing at least Li, A element (wherein A represents one or more elements selected from among Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm and Yb), M element (wherein M represents one or more metal elements except Li and the A element), Si, Al, oxygen and nitrogen. The fluorophor has an a type sialon crystal structure which is represented by the general formulae: (Lix1, Ax2, Mx3)(Si12?(m+n)Alm+n)(OnN16?n) 1.2?x1?2.4 (1) 0.001?x2?0.4 (2) and 0?x3?1.0 (3), and has a luminescence peak at a wavelength in the range of 400 to 700 nm. The above phosphor is reduced in the lowering of brightness, and can be suitably used for a white LED and the like.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: November 11, 2014
    Assignee: National Institute for Materials Science
    Inventors: Naoto Hirosaki, Rong-Jun Xie, Mamoru Mitomo
  • Patent number: 7910023
    Abstract: According to the invention, a highly crystalline ?-sialon is synthesized to emit highly intense light and a white LED showing an excellent color rendering characteristic is provided by shifting emitted light to the short wavelength side (blue shift). Such an ?-sialon is designed so as to be expressed by general formula (Lix, Cay, Euz) (Si12?(m+n)Alm+n) (OnN16?n) wherein the numerical ranges of x, y, z, m and n are respectively 0<x<2.0, 0<y<2.0, 0<z?0.5 (provided that 0.3?x+y+z?2.0), 0<m?4.0 and 0<n?3.0.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: March 22, 2011
    Assignee: National Institute for Materials Science
    Inventors: Rong-Jun Xie, Mamoru Mitomo, Naoto Hirosaki, Yoshinobu Yamamoto
  • Patent number: 7906040
    Abstract: An ?-sialon is offered which is represented by general formula: (M1)X(M2)Y(Si, Al)12(O, N)16 (wherein M1 represents one or more elements selected from the group which consists of Li, Mg, Ca, Y and lanthanoid (except La and Ce) and M2 represents one or more elements selected from the group which consists of Ce, Pr, Eu, Tb, Yb and Er and wherein 0.3<X+Y<1.5 and 0<Y<0.7), the ?-sialon containing from 30 ppm to 1% of fluorine as an impurity. By making primary particles of the ?-sialon 1 to 10 ?m in average particle size, an ?-sialon phosphor can be obtained reproducibly, stably and in a large quantity. Especially, if containing 30 to 200 ppm of impurity fluorine, the ?-sialon phosphor can exhibit an excellent emission characteristic as a white fluorescent matter.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: March 15, 2011
    Assignees: National Institute for Materials Science, Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Mamoru Mitomo, Naoto Hirosaki, Hideyuki Emoto, Masahiro Ibukiyama
  • Patent number: 7858997
    Abstract: A light emitting apparatus has a light emitting element with an emission wavelength in the range of 360 to 550 nm and a rare-earth element doped oxide nitride phosphor or cerium ion doped lanthanum silicon nitride phosphor. Part of light radiated from the light emitting element is wavelength-converted by the phosphor. The light emitting apparatus radiates white light generated by a mixture of the wavelength-converted light and the other part of light radiated from the light emitting element.
    Type: Grant
    Filed: March 13, 2007
    Date of Patent: December 28, 2010
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Naoki Yoshimura, Yoshinobu Suehiro, Yuji Takahashi, Koichi Ota, Mamoru Mitomo, Tadashi Endo, Masakazu Komatsu
  • Patent number: 7825580
    Abstract: A fluorophor comprising, as a main component, an ?-type sialon crystal which contains at least an A element (wherein A represents one or more elements selected from among Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm and Yb), an M element (wherein M represents one or more elements selected from among Li, Na, Mg, Ca, Y, La, Gd and Lu), Si, Al, oxygen and nitrogen, and is represented by the general formula: (Mx, Ay)(Si12?(m+n)Alm+n)(OnN16?n) (1) m=?M×x+?A×y (2) 0.2?x?2.4 (3) 0.001?y?0.4 (4) and 0.5×m<n?4 (5). The fluorophor is reduced in the lowering of brightness, and is useful for a white color LED and the like.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: November 2, 2010
    Assignee: National Institute for Materials Science
    Inventors: Naoto Hirosaki, Rong-Jun Xie, Mamoru Mitomo
  • Publication number: 20100072498
    Abstract: According to the invention, a highly crystalline ?-sialon is synthesized to emit highly intense light and a white LED showing an excellent color rendering characteristic is provided by shifting emitted light to the short wavelength side (blue shift). Such an ?-sialon is designed so as to be expressed by general formula (Lix, Cay, Euz) (Si12-(m+n)Alm+n) (OnN16-n) wherein the numerical ranges of x, y, z, m and n are respectively 0<x<2.0, 0<y<2.0, 0<z?0.5 (provided that 0.3?x+y+z?2.0), 0<m?4.0 and 0<n?3.0.
    Type: Application
    Filed: April 27, 2006
    Publication date: March 25, 2010
    Applicant: National Institute For Materials Science
    Inventors: Rong Jun Xie, Mamoru Mitomo, Naoto Hirosaki, Yoshinobu Yamamoto
  • Publication number: 20090091237
    Abstract: A fluorophor which comprises as a main component, an ? type sialon crystal containing at least Li, A element (wherein A represents one or more elements selected from among Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm and Yb), M element (wherein M represents one or more metal elements except Li and the A element), Si, Al, oxygen and nitrogen. The fluorophor has an a type sialon crystal structure which is represented by the general formulae: (Lix1, Ax2, Mx3)(Si12?(m+n)Alm+n)(OnN16?n) 1.2?x1?2.4 (1) 0.001?x2?0.4 (2) and 0?x3?1.0 (3), and has a luminescence peak at a wavelength in the range of 400 to 700 nm. The above phosphor is reduced in the lowering of brightness, and can be suitably used for a white LED and the like.
    Type: Application
    Filed: June 28, 2006
    Publication date: April 9, 2009
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Naoto Hirosaki, Rong-Jun Xie, Mamoru Mitomo
  • Publication number: 20090085465
    Abstract: A fluorophor comprising, as a main component, an ?-type sialon crystal which contains at least an A element (wherein A represents one or more elements selected from among Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm and Yb), an M element (wherein M represents one or more elements selected from among Li, Na, Mg, Ca, Y, La, Gd and Lu), Si, Al, oxygen and nitrogen, and is represented by the general formulae: (Mx, Ay)(Si12?(m+n)Alm+n)(OnN16?n) (1) m=?M×x+?A×y (2) 0.2?x?2.4 (3) 0.001?y?0.4 (4) and 0.5×m<n?4 (5). The fluorophor is reduced in the lowering of brightness, and is useful for a white color LED and the like.
    Type: Application
    Filed: June 28, 2006
    Publication date: April 2, 2009
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Naoto Hirosaki, Rong-Jun Xie, Mamoru Mitomo
  • Publication number: 20080064586
    Abstract: An ?-sialon is offered which is represented by general formula: (M1)X (M2)Y (Si, Al)12 (O, N)16 (wherein M1 represents one or more elements selected from the group which consists of Li, Mg, Ca, Y and lanthanoid (except La and Ce) and M2 represents one or more elements selected from the group which consists of Ce, Pr, Eu, Tb, Yb and Er and wherein 0.3<X+Y<1.5 and 0<Y<0.7), the ?-sialon containing from 30 ppm to 1% of fluorine as an impurity. By making primary particles of the ?-sialon 1 to 10 ?m in average particle size, an ?-sialon phosphor can be obtained reproducibly, stably and in a large quantity. Especially, if containing 30 to 200 ppm of impurity fluorine, the ?-sialon phosphor can exhibit an excellent emission characteristic as a white fluorescent matter.
    Type: Application
    Filed: June 14, 2005
    Publication date: March 13, 2008
    Applicants: National Institute for materials Science, Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Mamoru Mitomo, Naoto Hirosaki, Hideyuki Emoto, Masahiro Ibukiyama
  • Publication number: 20070248519
    Abstract: An ?-sialon which is represented by general formula: (M1)x (M2)y (Si, Al)12 (O, N)16 (wherein M1 represents one or more elements selected from the group which consists of Li, Mg, Ca, Y and lanthanoid (except La and Ce) and M2 represents one or more elements selected from the group which consists of Ce, Pr, Eu, Tb, Yb and Er and wherein 0.3<X+Y<1.5 and 0<Y<0.7) is synthesized by loading a container with a mixed powdery material of silicon nitride, aluminum nitride, an M1 containing compound and an M2 containing compound and at need aluminum oxide so that its bulk density is not more than 1.5 g/cm3, heat-treating the mixed powdery material at 1,600 to 2,000° C. in a nitrogen atmosphere. The ?-sialon is pulverized to make an ?-sialon powder, which can be utilized as a phosphor material for a while LED which uses a blue or an ultraviolet LED as its light source.
    Type: Application
    Filed: June 14, 2005
    Publication date: October 25, 2007
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Mamoru Mitomo, Naoto Hirosaki, Hideyuki Emoto, Masahiro Ibukiyama
  • Publication number: 20070164308
    Abstract: A light emitting apparatus has a light emitting element with an emission wavelength in the range of 360 to 550 nm and a rare-earth element doped oxide nitride phosphor or cerium ion doped lanthanum silicon nitride phosphor. Part of light radiated from the light emitting element is wavelength-converted by the phosphor. The light emitting apparatus radiates white light generated by a mixture of the wavelength-converted light and the other part of light radiated from the light emitting element.
    Type: Application
    Filed: March 13, 2007
    Publication date: July 19, 2007
    Applicants: TOYODA GOSEI CO., LTD., INDEPENDENT ADMINISTRATIVE INSTITUTION, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Naoki Yoshimura, Yoshinobu Suehiro, Yuji Takahashi, Koichi Ota, Mamoru Mitomo, Tadashi Endo, Masakazu Komatsu
  • Patent number: 7186391
    Abstract: The present invention provides a lanthanum sulfide or cerium sulfide sintered compact usable as a thermoelectric conversion material having a high Seebeck coefficient. The sintered compact has a chemical composition of La2S3 or Ce2S3, and a crystal structure consisting of a mixture of beta and gamma phases having a Seebeck coefficient higher than that of the crystal structure otherwise being in gamma single-phase. The sintered compact is produced by preparing a beta-phase La2S3 or alpha-phase Ce2S3 powder of raw material having a high purity with a suppressed carbon impurity concentration and a given range of oxygen concentration, charging the raw material into a carbon die having an inner surface covered with an h-BN applied thereon, and hot-pressing the charged material under vacuum to form a mixture of beta and gamma phases having a high Seebeck coefficient.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: March 6, 2007
    Assignees: Japan Science and Technology Agency, National Institute for Materials Science
    Inventors: Yoichiro Uemura, Mamoru Mitomo, Toshiyuki Nishimura, Shinji Hirai, Kazuyoshi Shimakage
  • Publication number: 20050001225
    Abstract: A light emitting apparatus has a light emitting element with an emission wavelength in the range of 360 to 550 nm and a rare-earth element doped oxide nitride phosphor or cerium ion doped lanthanum silicon nitride phosphor. Part of light radiated from the light emitting element is wavelength-converted by the phosphor. The light emitting apparatus radiates white light generated by a mixture of the wavelength-converted light and the other part of light radiated from the light emitting element.
    Type: Application
    Filed: November 28, 2003
    Publication date: January 6, 2005
    Applicants: Toyoda Gosei Co., Ltd., Independent Administrative Institution, National Institute for Materials Science
    Inventors: Naoki Yoshimura, Yoshinobu Suehiro, Yuji Takahashi, Koichi Ota, Mamoru Mitomo, Tadashi Endo, Masakazu Komatsu
  • Patent number: 6776927
    Abstract: An oxynitride phosphor activated by a rare earth element, represented by the formula CaxSi12−(m+n)Al(m+n)OnN16−n: EuyDyz, wherein stabilizing metal (Ca) is substituted partially by Eu or Eu and Dy where 0.3<x<1.5, 0.01<y<0.7, 0≦z<0.1, 0.6<m<3.0 and 0<n<1.5.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: August 17, 2004
    Assignee: National Institute for Materials Science
    Inventors: Mamoru Mitomo, Tadashi Endo, Kyouta Ueda, Masakazu Komatsu
  • Patent number: 6737378
    Abstract: A silicon nitride sintered product comprising silicon nitride grains and a grain boundary phase, wherein the grain boundary phase consists essentially of a single phase of a Lu4Si2O7N2 crystal phase, and the composition of the silicon nitride sintered product is a composition in or around a triangle ABC having point A: Si3N4, point B: 28 mol % SiO2-72 mol % Lu2O3 and point C: 16 mol % SiO2-84 mol % Lu2O3, as three apexes, in a ternary system phase diagram of a Si3N4—SiO2—Lu2O3 system. Also disclosed is a silicon nitride sintered product comprising silicon nitride grains and a grain boundary phase of an oxynitride, wherein the composition of the sintered product is a composition in a triangle having point A: Si3N4, point B: 40 mol % SiO2-60 mol % Lu2O3 and point C: 60 mol % SiO2-40 mol % Lu2O3, as three apexes, in a ternary system phase diagram of a Si3N4—SiO2—Lu2O3 system.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: May 18, 2004
    Assignee: National Institute for Research in Inorganic Materials
    Inventors: Naoto Hirosaki, Toshiyuki Nishimura, Yoshinobu Yamamoto, Mamoru Mitomo
  • Patent number: 6632379
    Abstract: A sialon type phosphor in the form of a powder comprising at least 40 wt % of &agr;-sialon represented by the formula (Cax,My)(Si,Al)12(O,N)16 (where M is at least one metal selected from the group consisting of Eu, Tb, Yb and Er, 0.05<(x+y)<0.3, 0.02<x<0.27 and 0.03<y<0.3) and having a structure such that Ca sites of Ca-&agr;-sialon are partially substituted by other metal M, at most 40 wt % of &bgr;-sialon, and at most 30 wt % of unreacted silicon nitride.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: October 14, 2003
    Assignee: National Institute for Materials Science
    Inventors: Mamoru Mitomo, Tadashi Endo, Kyouta Ueda, Masakazu Komatsu
  • Publication number: 20030168643
    Abstract: An oxynitride phosphor activated by a rare earth element, represented by the formula MexSi12−(m+n)Al(m+n)OnN16−n:Re1yRe2x, wherein a part or all of metal Me (where Me is at least one metal selected from the group consisting of Ca, Mg, Y and lanthanide metals excluding La and Ce) in &agr;-sialon solid solution, is substituted by lanthanide metal Re1 (where Re1 is at least one metal selected from the group consisting of Ce, Pr, Eu, Tb, Yb and Er), or two lanthanide metals Re1 and a coactivator Re2 (where Re2 is Dy), to be an emission center.
    Type: Application
    Filed: April 8, 2003
    Publication date: September 11, 2003
    Applicant: National Institute for Materials Science
    Inventors: Mamoru Mitomo, Tadashi Endo, Kyouta Ueda, Masakazu Komatsu