Patents by Inventor Yasushi Kuroda

Yasushi Kuroda 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: 20170136438
    Abstract: A fluid flow-through device and a photochemical reactor. The fluid flow-through device (1) includes an outer tube (2) having an outer surface (21) and an inner surface (22); and an inner tube (3) having an outer surface (31) and an inner surface (32), the inner tube being disposed inside the outer tube and forming a channel of a fluid by the inner surface of the outer tube and the outer surface, with a distance between the inner surface of the outer tube and the outer surface of the inner tube in a thickness direction of the outer tube being from 100 nm to 5 mm. The photochemical reactor includes the fluid flow-through device and a photocatalyst disposed on at least one surface of the inner surface of the outer tube and the outer surface of the inner tube.
    Type: Application
    Filed: July 29, 2015
    Publication date: May 18, 2017
    Applicants: NATIONAL UNIVERSITY CORPORATION SHINSHU UNIVERSITY, SHOWA DENKO K.K.
    Inventors: Hisanao USAMI, Yasushi KURODA, Mitsuhiro IMAIZUMI
  • Patent number: 9617166
    Abstract: An object of the present invention is to provide a method for producing metal oxide particles, in which metal oxide particles with high photocatalytic activity is produced, and a production apparatus therefor. The above object can be achieved by using a method for producing metal oxide particles, which includes subjecting a reaction gas containing metal chloride and an oxidizing gas containing no metal chloride in a reaction tube (11) to preheating, and then subjecting a combined gas composed of the reaction gas and the oxidizing gas to main heating in a main heating region (A) apart from the downstream side of the junction (5b), wherein the time until the combined gas from the junction (5b) arrives at the upstream end (A1) of the main heating region (A) is adjusted to be less than 25 milliseconds.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: April 11, 2017
    Assignees: National University Corporation Hokkaido University, SHOWA DENKO K.K.
    Inventors: Bunsho Ohtani, Noriyuki Sugishita, Yasushi Kuroda
  • Patent number: 9516881
    Abstract: The Cu- and Ti-containing composition of the present invention contains titanium oxide having a rutile-type titanium oxide content of 15 mol % or more, and at least one divalent copper compound represented by the following formula (1). The Cu- and Ti-containing composition production method of the present invention is characterized by including stirring a mixture containing titanium oxide having a rutile-type titanium oxide content of 15 mol % or more, a divalent copper compound raw material represented by formula (2), water, and an alkaline compound, to thereby cause precipitation. The composition of the present invention exhibits excellent anti-viral property under light and in the dark, and excellent organic compound decomposition activity under light.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: December 13, 2016
    Assignee: SHOWA DENKO K.K.
    Inventors: So Miyaishi, Yasushi Kuroda, Yasuhiro Hosogi, Ding Li
  • Patent number: 9352965
    Abstract: There is provided a method and an apparatus for producing metal oxide particles, which produce metal oxide particles having a high photocatalytic activity with high yield.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: May 31, 2016
    Assignees: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, SHOWA DENKO K.K.
    Inventors: Bunsho Ohtani, Noriyuki Sugishita, Yasushi Kuroda
  • Patent number: 9248432
    Abstract: A copper compound-carried titanium oxide photocatalyst which is excellent in a photocatalytic activity and a viral inactivation property and a production process for the same can be provided by a copper compound-carried titanium oxide photocatalyst comprising titanium oxide in which a content of rutile type titanium oxide is 50% by mole or more and a monovalent copper compound and a divalent copper compound which are carried on a surface of the titanium oxide described above and a production process for a copper compound-carried titanium oxide photocatalyst, comprising a step of carrying a monovalent copper compound and a divalent copper compound on a surface of titanium oxide in which a content of rutile type titanium oxide is 50% by mole or more.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: February 2, 2016
    Assignees: THE UNIVERSITY OF TOKYO, SHOW A DENKO K.K.
    Inventors: Kazuhito Hashimoto, Masahiro Miyauchi, Xiaoqing Qiu, Kayano Sunada, Yasushi Kuroda, Yasuhiro Hosogi, Ding Li, Yoshiki Shimodaira
  • Patent number: 9210939
    Abstract: The Cu- and Ti-containing composition of the present invention contains titanium oxide including rutile-crystal-type titanium oxide, and a divalent copper compound, wherein the rutile-crystal-type titanium oxide exhibits the most intense diffraction peak attributed to rutile-type titanium oxide having a full width at half maximum of 0.65° or less, in a Cu—K? line X-ray diffraction pattern, which is obtained by plotting intensity of diffraction line with respect to diffraction angle 2?. The composition exhibits excellent anti-viral property under light and in the dark, and excellent organic compound degradability under light.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: December 15, 2015
    Assignee: SHOWA DENKO K.K.
    Inventors: So Miyaishi, Yasushi Kuroda, Yasuhiro Hosogi, Ding Li
  • Patent number: 8889164
    Abstract: An antimicrobial and antiviral composition, a method of producing the same, and the like are provided, which are capable of exhibiting an excellent antimicrobial and antiviral properties over a long time in the application for various uses. The antimicrobial and antiviral composition contains cuprous oxide particles having a BET specific surface area of 5 to 100 m2/g and a saccharide having an aldehyde group, in which the content of the saccharide with an aldehyde group is 0.5 to 10 mass part based on the cuprous oxide particles of 100 mass part. The method produces this composition.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: November 18, 2014
    Assignees: Showa Denko K.K., The University of Tokyo
    Inventors: Kazuhito Hashimoto, Kayano Sunada, Masahiro Miyauchi, Ding Li, Yasushi Kuroda
  • Publication number: 20140322353
    Abstract: The Cu- and Ti-containing composition of the present invention contains titanium oxide having a rutile-type titanium oxide content of 15 mol % or more, and at least one divalent copper compound represented by the following formula (1). The Cu- and Ti-containing composition production method of the present invention is characterized by including stirring a mixture containing titanium oxide having a rutile-type titanium oxide content of 15 mol % or more, a divalent copper compound raw material represented by formula (2), water, and an alkaline compound, to thereby cause precipitation. The composition of the present invention exhibits excellent anti-viral property under light and in the dark, and excellent organic compound decomposition activity under light.
    Type: Application
    Filed: December 17, 2012
    Publication date: October 30, 2014
    Applicant: SHOWA DENKO K.K.
    Inventors: So Miyaishi, Yasushi Kuroda, Yasuhiro Hosogi, Ding Li
  • Publication number: 20140199357
    Abstract: An antimicrobial and antiviral composition, a method of producing the same, and the like are provided, which are capable of exhibiting an excellent antimicrobial and antiviral properties over a long time in the application for various uses. The antimicrobial and antiviral composition contains cuprous oxide particles having a BET specific surface area of 5 to 100 m2/g and a saccharide having an aldehyde group, in which the content of the saccharide with an aldehyde group is 0.5 to 10 mass part based on the cuprous oxide particles of 100 mass part. The method produces this composition.
    Type: Application
    Filed: October 4, 2012
    Publication date: July 17, 2014
    Applicants: THE UNIVERSITY OF TOKYO, SHOWA DENKO K.K.
    Inventors: Kazuhito Hashimoto, Kayano Sunada, Masahiro Miyauchi, Ding Li, Yasushi Kuroda
  • Patent number: 8728973
    Abstract: The present invention relates to a photocatalytic material having a visible light activity which includes a tungsten-doped titanium oxide or a tungsten/gallium-codoped titanium oxide, and a divalent copper salt and/or a trivalent iron salt supported on a surface of the doped or codoped titanium oxide, and a process for producing the photocatalytic material.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: May 20, 2014
    Assignees: The University of Tokyo, Showa Denko K.K.
    Inventors: Kazuhito Hashimoto, Hiroshi Irie, Huogen Yu, Yasushi Kuroda, Yasuhiro Hosogi
  • Patent number: 8679449
    Abstract: Provided is a method for producing decahedral titanium oxide particles, wherein the decahedral titanium oxide particles are produced by allowing a reaction gas containing titanium tetrachloride to flow into a reaction pipe having a partial double-pipe structure in which a hollow internal cylinder is inserted into an upstream portion of a hollow external cylinder, the method comprising: performing a preheating on the reaction gas containing titanium tetrachloride and a barrier gas not containing metal chlorides in a region on the upstream side of a downstream end of the hollow internal cylinder, while allowing the reaction gas to flow into the hollow internal cylinder and the barrier gas to flow between the hollow internal cylinder and the hollow external cylinder; and performing a main heating on the reaction gas in a downstream region apart from the downstream end of the hollow internal cylinder to thermally decompose the titanium tetrachloride.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: March 25, 2014
    Assignees: National University Corporation Hokkaido University, Showa Denko K.K.
    Inventors: Bunsho Ohtani, Yasushi Kuroda, Noriyuki Sugishita
  • Patent number: 8652991
    Abstract: The present invention relates to a method for producing a tungsten oxide photocatalyst having titanium oxide and copper ion supported thereon, comprising dissolving urea in a solution in which copper-ion supporting tungsten oxide particles are uniformly dispersed in a titanium oxide sol, thermally decomposing the urea to thereby allow the titanium oxide to precipitate on the surface of copper ion-supporting tungsten oxide and to be supported thereon; and a tungsten oxide photocatalyst modified by both titanium oxide and copper ion obtained by the method, wherein the rate of change of diffuse reflectivity (at wavelength of 700 nm) is less than 3% before and after the irradiation of ultraviolet and the titanium oxide is supported on the tungsten oxide in an island shape of 1 to 100 nm in size. The tungsten oxide photocatalyst having titanium oxide and copper ion supported thereon of the present invention exhibits high catalyst activity under visible light irradiation.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: February 18, 2014
    Assignee: Showa Denko K.K.
    Inventors: Yasuhiro Hosogi, Yasushi Kuroda
  • Publication number: 20130281283
    Abstract: A copper compound-carried titanium oxide photocatalyst which is excellent in a photocatalytic activity and a viral inactivation property and a production process for the same can be provided by a copper compound-carried titanium oxide photocatalyst comprising titanium oxide in which a content of rutile type titanium oxide is 50% by mole or more and a monovalent copper compound and a divalent copper compound which are carried on a surface of the titanium oxide described above and a production process for a copper compound-carried titanium oxide photocatalyst, comprising a step of carrying a monovalent copper compound and a divalent copper compound on a surface of titanium oxide in which a content of rutile type titanium oxide is 50% by mole or more.
    Type: Application
    Filed: June 22, 2012
    Publication date: October 24, 2013
    Applicants: THE UNIVERSTIY OF TOKYO, SHOWA DENKO K.K.
    Inventors: Kazuhito Hashimoto, Masahiro Miyauchi, Xiaoqing Qiu, Kayano Sunada, Yasushi Kuroda, Yasuhiro Hosogi, Ding Li, Yoshiki Shimodaira
  • Publication number: 20130095998
    Abstract: The present invention relates to a method for producing a tungsten oxide photocatalyst having titanium oxide and copper ion supported thereon, comprising dissolving urea in a solution in which copper-ion supporting tungsten oxide particles are uniformly dispersed in a titanium oxide sol, thermally decomposing the urea to thereby allow the titanium oxide to precipitate on the surface of copper ion-supporting tungsten oxide and to be supported thereon; and a tungsten oxide photocatalyst modified by both titanium oxide and copper ion obtained by the method, wherein the rate of change of diffuse reflectivity (at wavelength of 700 nm) is less than 3% before and after the irradiation of ultraviolet and the titanium oxide is supported on the tungsten oxide in an island shape of 1 to 100 nm in size. The tungsten oxide photocatalyst having titanium oxide and copper ion supported thereon of the present invention exhibits high catalyst activity under visible light irradiation.
    Type: Application
    Filed: May 23, 2012
    Publication date: April 18, 2013
    Applicant: SHOWA DENKO K.K.
    Inventors: Yasuhiro Hosogi, Yasushi Kuroda
  • Publication number: 20120328508
    Abstract: There is provided a method and an apparatus for producing metal oxide particles, which produce metal oxide particles having a high photocatalytic activity with high yield.
    Type: Application
    Filed: March 7, 2011
    Publication date: December 27, 2012
    Applicant: SHOWA DENKO K.K.
    Inventors: Bunsho Ohtani, Noriyuki Sugishita, Yasushi Kuroda
  • Patent number: 8289106
    Abstract: An acoustic wave device includes: a piezoelectric substrate; at least five IDTs (InterDigital Transducers) arranged on the substrate in directions of SAW (Surface Acoustic Wave) propagation; and two balanced terminals connected to two first IDTs that are two out of the at least five IDTs and are 180 degrees out of phase. One of a pair of comb electrodes of one of the two first IDTs is connected to one of the two balanced terminals, and one of a pair of comb electrodes of the other one of the two first IDTs being connected to the other one of the two balanced terminals. The other comb electrodes of the two first IDTs are connected in series, and one of a pair of comb electrodes that form an IDT that is included in the at least five IDTs and is not connected to the two first IDTs is grounded.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: October 16, 2012
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Yasushi Kuroda, Akira Moriya
  • Publication number: 20120201714
    Abstract: To provide a method for inactivating a virus which is in contact with a photocatalyst material, the method including irradiating the photocatalyst material with light from a light source, and an article provided with an anti-viral property, the article containing a visible-light-responsive photocatalyst material deposited on the surface thereof.
    Type: Application
    Filed: October 19, 2010
    Publication date: August 9, 2012
    Applicant: The University of Tokyo
    Inventors: Kazuhito Hashimoto, Kayano Sunada, Yoshinobu Kubota, Hitoshi Ishiguro, Ryuichi Nakano, Jitsuo Kajioka, Yanyan Yao, Yasushi Kuroda, Yasuhiro Hosogi
  • Publication number: 20120141362
    Abstract: An object of the present invention is to provide a method for producing metal oxide particles, in which metal oxide particles with high photocatalytic activity is produced, and a production apparatus therefor. The above object can be achieved by using a method for producing metal oxide particles, which includes subjecting a reaction gas containing metal chloride and an oxidizing gas containing no metal chloride in a reaction tube (11) to preheating, and then subjecting a combined gas composed of the reaction gas and the oxidizing gas to main heating in a main heating region (A) apart from the downstream side of the junction (5b), wherein the time until the combined gas from the junction (5b) arrives at the upstream end (A1) of the main heating region (A) is adjusted to be less than 25 milliseconds.
    Type: Application
    Filed: August 3, 2010
    Publication date: June 7, 2012
    Applicant: National University Corporation Hokkaido University
    Inventors: Bunsho Ohtani, Noriyuki Sugishita, Yasushi Kuroda
  • Publication number: 20120135861
    Abstract: The present invention relates to a photocatalytic material having a visible light activity which includes a tungsten-doped titanium oxide or a tungsten/gallium-codoped titanium oxide, and a divalent copper salt and/or a trivalent iron salt supported on a surface of the doped or codoped titanium oxide, and a process for producing the photocatalytic material.
    Type: Application
    Filed: July 29, 2010
    Publication date: May 31, 2012
    Applicants: SHOWA DENKO K.K., THE UNIVERSITY OF TOKYO
    Inventors: Kazuhito Hashimoto, Hiroshi Irie, Huogen Yu, Yasushi Kuroda, Yasuhiro Hosogi
  • Patent number: 8178074
    Abstract: Titanium oxide particles having a particle having a decahedral box-shape and a particle size in a range of from 1 nm to 100 nm can be selectively and efficiently produced by carrying out a method in which in a case of oxidizing titanium tetrachloride in vapor at high temperatures, it is rapidly heated and cooled, and a method, in which water vapor is used as an oxidizing gas, in combination under certain conditions.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: May 15, 2012
    Assignees: Showa Denko K.K., National University Corporation Hokkaido University
    Inventors: Yasushi Kuroda, Noriyuki Sugishita, Bunsho Ohtani