Patents by Inventor Ariyoshi Ishizaki
Ariyoshi Ishizaki 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).
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Patent number: 8404617Abstract: An object of the invention is to provide a photocatalyst material having a higher catalyst effect than conventional photocatalyst materials. The photocatalyst material of the invention contains, as its major component, a tungsten oxide powder excited by a light source which emits light having a wavelength of 430 to 500 nm, the photocatalyst material having a decomposition ability of 50% or more wherein the decomposition ability is given by the following equation based on the following test: [Test for decomposition ability]: 1 g of a tungsten oxide powder and 20 ppm of acetaldehyde (amount A) are poured into a 3-liter glass container, and acetaldehyde (amount B) is measured after light having a peak wavelength of 460 nm±10 nm is irradiated to the mixture for 2 hours to measure the decomposition ability (%): Decomposition ability (%)=[(acetaldehyde amount A?acetaldehyde amount B)/acetaldehyde amount A]×100.Type: GrantFiled: August 1, 2008Date of Patent: March 26, 2013Assignee: Toshiba Materials Co., Ltd.Inventors: Kayo Nakano, Akira Sato, Yasuhiro Shirakawa, Masami Okamura, Ryotaro Matsuda, Takaya Kamakura, Kazunari Otsuka, Kiyoshi Yokokura, Hideki Okawa, Ariyoshi Ishizaki
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Publication number: 20090023583Abstract: An object of the invention is to provide a photocatalyst material having a higher catalyst effect than conventional photocatalyst materials. The photocatalyst material of the invention contains, as its major component, a tungsten oxide powder excited by a light source which emits light having a wavelength of 430 to 500 nm, the photocatalyst material having a decomposition ability of 50% or more wherein the decomposition ability is given by the following equation based on the following test: [Test for Decomposition Ability] 1 g of a tungsten oxide powder and 20 ppm of acetaldehyde (amount A) are poured into a 3-liter glass container, and acetaldehyde (amount B) is measured after light having a peak wavelength of 460 nm±10 nm is irradiated to the mixture for 2 hours to measure the decomposition ability (%): Decomposition ability(%)=[(acetaldehyde amount A?acetaldehyde amount B)/acetaldehyde amount A]×100.Type: ApplicationFiled: August 1, 2008Publication date: January 22, 2009Inventors: Kayo Nakano, Akira Sato, Yasuhiro Shirakawa, Masami Okamura, Ryotaro Matsuda, Takaya Kamakura, Kazunari Otsuka, Kiyoshi Yokokura, Hideki Okawa, Ariyoshi Ishizaki
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Publication number: 20070177372Abstract: A photocatalytic material containing tungsten trioxide fine particles having an average particle diameter of 0.5 ?m or smaller and a crystal structure of a monoclinic crystal system as a main component.Type: ApplicationFiled: January 31, 2007Publication date: August 2, 2007Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATIONInventors: Ryotaro Matsuda, Takaya Kamakura, Hideki Okawa, Ariyoshi Ishizaki
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Patent number: 6861787Abstract: An ultraviolet ray lamp includes a discharge vessel made of quartz glass, filled with a filling. A pair of electrodes is able to generate a discharge in the discharge vessel. An optical filter made of metal oxide, which is partly formed on the outer surface of the discharge vessel, transmits ultraviolet rays of long wavelength and cuts off ultraviolet rays of short wavelength. Furthermore, A device for generating ultraviolet rays includes an ultraviolet ray lamp generating ultraviolet rays including short and long wavelength, having a discharge vessel made of quartz glass. An enclosure accommodates the discharge vessel, transmitting at least ultraviolet ray of short wavelength. An optical filter made of metal oxide, which is partly formed on at least one side of the surface of the enclosure, transmits ultraviolet rays of long wavelength and cuts off ultraviolet rays of short wavelength.Type: GrantFiled: March 14, 2001Date of Patent: March 1, 2005Assignee: Toshiba Lighting & Technology CorporationInventors: Ryoutarou Matsuda, Ariyoshi Ishizaki, Akiko Saito
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Publication number: 20030232186Abstract: The invention provides a photocatalyst coating comprising a mixture of ultraviolet rays type photocatalyst fine particles and a visible rays type photocatalyst fine particles at a mass-% in a range of 3:7 to 7:3.Type: ApplicationFiled: June 12, 2003Publication date: December 18, 2003Applicant: Toshiba Lighting & Technology CorporationInventors: Ryoutarou Matsuda, Akiko Saitou, Kazunari Otsuka, Ariyoshi Ishizaki, Satoshi Uchiyama
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Publication number: 20030113246Abstract: A deodorization apparatus comprises: a case body 2a formed therein with an air-flow passage 2i through which air flows; first and second lamp units 8, 10 disposed in an air-flow passage in the case body and adapted to generate ozone; first, second and third photo-catalyst filters 7, 9, 11 disposed in the air-flow passage in the case body and provided with photo-catalyst filters; and an impregnated carbon disposed on the downstream side of at least one of the first and second lamp units 8, 10 and the photo-catalyst filters and formed by impregnating an activated carbon adsorbing an odor component with at least one component of iron oxide, potassium hydroxide, nickel nitrate. According to this structure, the deodorization effect at the one passing of the contaminated air, in the air-flow passage, containing odor component is improved, the usable life time can be elongated, and the maintenance of the impregnated carbon, can be simplified.Type: ApplicationFiled: November 27, 2002Publication date: June 19, 2003Inventors: Akiko Saitou, Ryoutarou Matsuda, Ariyoshi Ishizaki, Kazunari Otsuka, Takanobu Oishi
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Patent number: 6448712Abstract: A high-pressure discharge lamp which includes a light-transmitting air-tight discharge container, an electrode formed of tungsten as a main component and fixedly sealed in the discharge container, and a discharge medium containing a halide of a light emitting metal and sealed in the discharge container. The surface of the electrode is defined as follows. That is, the average value of center line average roughness Ra of the surface, is set to 0.3 &mgr;m or less, or the average value of the center line average roughness Rz of the surface of the electrode, is set to 1.0 &mgr;m or less, or the average value of the surface area increasing rate of the surface of the electrode is set to 1.0% or less.Type: GrantFiled: January 11, 2001Date of Patent: September 10, 2002Assignee: Toshiba Lighting and Technology CorporationInventors: Hisashi Honda, Seiji Ashida, Kiyoshi Saita, Ariyoshi Ishizaki, Akira Itoh, Shigehisa Kawatsuru, Tatsuo Otabe
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Publication number: 20020024278Abstract: An ultraviolet ray lamp comprises a discharge vessel made of quartz glass, filled with a filling. A pair of electrodes is able to generate a discharge in the discharge vessel. An optical filter made of metal oxide, which is partly formed on the outer surface of the discharge vessel, transmits ultraviolet rays of long wavelength and cuts off ultraviolet rays of short wavelength. Furthermore, A device for generating ultraviolet rays comprises an ultraviolet ray lamp generating ultraviolet rays including short and long wavelength, having a discharge vessel made of quartz glass. An enclosure accommodates the discharge vessel, transmitting at least ultraviolet ray of short wavelength. An optical filter made of metal oxide, which is partly formed on at least one side of the surface of the enclosure, transmits ultraviolet rays of long wavelength and cuts off ultraviolet rays of short wavelength.Type: ApplicationFiled: March 14, 2001Publication date: February 28, 2002Inventors: Ryoutarou Matsuda, Ariyoshi Ishizaki, Akiko Saito
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Publication number: 20010008365Abstract: A high-pressure discharge lamp which includes a light-transmitting air-tight discharge container, an electrode formed of tungsten as a main component and fixedly sealed in the discharge container, and a discharge medium containing a halide of a light emitting metal and sealed in the discharge container. The surface of the electrode is defined as follows. That is, the average value of center line average roughness Ra of the surface, is set to 0.3 &mgr;m or less, or the average value of the center line average roughness Rz of the surface of the electrode, is set to 1.0 &mgr;m or less, or the average value of the surface area increasing rate of the surface of the electrode is set to 1.0% or less.Type: ApplicationFiled: January 12, 2001Publication date: July 19, 2001Applicant: Toshiba Lighting and Technology CorporationInventors: Hisashi Honda, Seiji Ashida, Kiyoshi Saita, Ariyoshi Ishizaki, Akira Itoh, Shigehisa Kawatsuru, Tatsuo Otabe
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Patent number: 6249086Abstract: A high-pressure discharge lamp which includes a light-transmitting air-tight discharge container, an electrode formed of tungsten as a main component and fixedly sealed in the discharge container, and a discharge medium containing a halide of a light emitting metal and sealed in the discharge container. The surface of the electrode is defined as follows. That is, the average value of center line average roughness Ra of the surface, is set to 0.3 &mgr;m or less, or the average value of the center line average roughness Rz of the surface of the electrode, is set to 1.0 &mgr;m or less, or the average value of the surface area increasing rate of the surface of the electrode is set to 1.0% or less.Type: GrantFiled: December 10, 1999Date of Patent: June 19, 2001Assignee: Toshiba Lighting & Technology CorporationInventors: Hisashi Honda, Seiji Ashida, Kiyoshi Saita, Ariyoshi Ishizaki, Akira Itoh, Shigehisa Kawatsuru, Tatsuo Otabe
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Patent number: 6242752Abstract: A translucent cover (9) is so provided as to cover a high pressure sodium lamp (11) adapted to radiate at least visible light and rays of light in the wavelength range of 300 nm to 400 nm. A photocatalytic film (13) which is capable of preventing generation of interference between visible light is formed on either one of or both the inner side and outer side of the translucent cover (9). The photocatalytic film (13) contains as the principal component titania (TiO2) of which the peak wavelength for visible light transmittance is nearly the same as the peak wavelength for visible light radiated from the high pressure sodium lamp (11). Ultraviolet light radiated from the high pressure sodium lamp (11) enhances oxidation and decomposition of substances performed by the photocatalytic film (13), thereby preventing grime and contaminants from adhering to the translucent cover (9).Type: GrantFiled: April 16, 1999Date of Patent: June 5, 2001Assignees: Toshiba Lighting and Technology Corp., Nihon Doro Kodan-Japan Highway Public Corp.Inventors: Ryuji Soma, Hisashi Honda, Ariyoshi Ishizaki, Tsutomu Watanabe, Hiroshi Kamata, Akiko Saitou, Akimasa Endou
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Patent number: 6057635Abstract: A low-pressure mercury vapor-filled discharge lamp has a glass arc tube and a glass outer tube disposed coaxially with the arc tube forming a space therebetween. A gas is disposed in the space. The arc tube contains a gas and is coated with a phosphor. A first seal hermetically seals the inner tube. A second seal seals the inner tube to the outer tube. The inner tube further contains a pair of cathodes coupled to Dumet wires extending from the interior of the inner tube to the outside of the lamp structure. The pressure in the space is set at not more than 1 Pa, which is nearly high vacuum. The longer the radial dimension of the space, the greater the heat retaining capacity and the better the temperature characteristics which can be obtained. However, by setting the pressure of the space at 1 Pa or less, the optimum heat retaining capacity can be obtained while reducing the diameter of the low-pressure mercury vapor filled discharge lamp 1.Type: GrantFiled: October 31, 1997Date of Patent: May 2, 2000Assignee: Toshiba Lighting and Technology CorporationInventors: Kiyoshi Nishimura, Ariyoshi Ishizaki, Kunio Yuasa, Masuo Shibuya, Masami Takagi, Naoki Tsutsui, Miho Saito, Shinji Mochimaru
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Patent number: 4634919Abstract: There is proposed a bulb which is coated with an optical interference film consisting of alternately formed thin titanium oxide layers and metal oxide layers of a lower refractive index than that of titanium oxide layers. The characteristics of the bulb reside in the formation of each titanium oxide layer which is formed by thermal decomposition of a mixture consisting of 5 to 50 parts by weight of Ti(OR).sub.4 and 95 to 50 parts by weight of polymerized Ti(OR).sub.4, where R are C.sub.1 to C.sub.18 alkyl group, --OCOR' (R' is C.sub.1 to C.sub.18 alkyl group or --X radical which is capable of forming a chelate ring with titanium.Type: GrantFiled: August 17, 1984Date of Patent: January 6, 1987Assignees: Kabushiki Kaisha Toshiba, Nippon Soda Co., Ltd.Inventors: Yooji Yuge, Ariyoshi Ishizaki, Tokuyoshi Saito, Takeshi Ishii