Patents Assigned to Akira Fujishima
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Patent number: 6106692Abstract: There is provided a concentration sensor for measurement of concentrations of one or plural target substances in a system, with a detection electrode of conductive diamond. The measuring method with the concentration sensor involves measuring the reaction potentials of plural target substances in a sample containing and determining the concentrations of the plural substances by use of the difference between the resulting reaction potentials of the respective substances. The measuring method can also determine the concentration of a single substance in a sample containing one kind of target substance.Type: GrantFiled: July 13, 1998Date of Patent: August 22, 2000Assignees: Imra Japan Kabushikikaisha, Akira Fujishima, Kazuhito Hashimoto, Kohei UosakiInventors: Keiji Kunimatsu, Toshihide Nakata, Toshiya Saito, Mayumi Kazuta, Akira Fujishima, Kazuhito Hashimoto, Kohei Uosaki
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Patent number: 6099695Abstract: A ZnO--Pd composite catalyst wherein Pd is dispersed and fixed on the surface of ZnO is produced by ion adsorption process having the steps of soaking ZnO in an acid solution of Pd to adsorb Pd ions (Pd.sup.2+) onto the surface of ZnO; and reducing the adsorbed Pd ions to metallic Pd particles so that the metallic Pd particles are substantially evenly deposited on the surface of ZnO. The ZnO--Pd composite catalyst provides a stable and continuing CO oxidizing capability, without light irradiation, even when the air to be treated contains sulfur compounds such as H.sub.2 S and SOx.Type: GrantFiled: August 13, 1997Date of Patent: August 8, 2000Assignees: Akira Fujishima, Kazuhito Hashimoto, Kabushikikaisha Equos Research, Aisin AW Co., Ltd.Inventors: Akira Fujishima, Kazuhito Hashimoto, Shuzo Moroto, Masao Ando, Masako Sakai
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Patent number: 5948355Abstract: An air-purifying filter includes a carrier base and a TiO.sub.2 -Pd composite catalyst supported on the carrier base. CO in air treated by the filter is adsorbed onto the Pd surface and thus decomposed by oxidization to CO.sub.2, whereas sulfur compounds in the air are adsorbed onto the Pd surface and then transferred to the TiO.sub.2 surface where they are decomposed by oxidization to SO.sub.4.sup.-2 when the TiO.sub.2 is subjected to irradiation. Preferably, Pd exists in a relatively small quantity at a first side of the carrier base in the vicinity of a light source and in a greater quantity at a second side opposite the first side. The first side is preferably located upstream relative to flow of air treated by the filter. An air-purifier utilizing this filter is mounted in an automobile, preferably on a rear shelf or in a trunk compartment.Type: GrantFiled: August 26, 1997Date of Patent: September 7, 1999Assignees: Akira Fujishima, Kazuhito Hashimoto, KabushikiKaisha Equos Research, Aisin Aw Co., Ltd.Inventors: Akira Fujishima, Kazuhito Hashimoto, Shuzo Moroto, Masao Ando, Masako Sakai
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Patent number: 5855595Abstract: A tumor treatment apparatus is provided including a light source which emits a bundle of light including ultraviolet radiation, visible radiation and infrared radiation. Also provided are an infrared radiation filter which filters infrared radiation, a visible radiation filter which filters visible radiation, and an optical fiber which transmits a bundle of light transmitted through the infrared radiation filter and the visible radiation filter toward an affected part of a patient to be treated.Type: GrantFiled: April 4, 1995Date of Patent: January 5, 1999Assignees: Asahi Kogaku Kogyo Kabushiki Kaisha, Akira Fujishima, Kazuhito Hashimoto, Yoshinobu KubotaInventors: Akira Fujishima, Kazuhito Hashimoto, Yoshinobu Kubota, Rensuke Adachi, Teruyuki Kakeda
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Patent number: 5547823Abstract: A photocatalyst composite is provided which comprise a substrate having particles of a photocatalyst such as titanium oxide, adhered thereon via a less degradative adhesive such as a fluorinated polymer comprising a copolymer of a vinyl ester and/or vinyl ether and a fluoroolefin, or a silicon based polymer or cement. Furthermore, a process for producing the photocatalyst composite and a coating composition containing the photocatalyst composite are provided.Type: GrantFiled: November 9, 1995Date of Patent: August 20, 1996Assignees: Ishihara Sangyo Kaisha, Ltd., Akira Fujishima, Kazuhito HashimotoInventors: Sadao Murasawa, Hajime Murakami, Yasuro Fukui, Mitsuru Watanabe, Akira Fujishima, Kazuhito Hashimoto
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Patent number: 5445997Abstract: A patterning method which comprises forming a photosensitive inorganic semiconductor layer on a semiconductor substrate and irradiating the photosensitive inorganic semiconductor layer which is kept in contact with an electrolyte with light of energy greater than the band gap of the semiconductor layer. Thus, a portion of the semiconductor layer which has been exposed or unexposed to light is dissolved into the electrolyte, thereby producing a desired pattern on the substrate.Type: GrantFiled: October 12, 1993Date of Patent: August 29, 1995Assignees: Matsushita Electric Industrial Co., Ltd., Akira FujishimaInventors: Akira Fujishima, Shigeo Kondo
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Patent number: 5126921Abstract: An electronic component such as a capacitor having a pair of electrodes interposing a dielectric layer and a photosensitive metal oxide semiconductor layer therebetween. The electronic component is formed by immersing the layered body of one electrode, the dielectric, and the metal oxide layer in an electroless plating catalytic solution to have the catalyst deposited on the metal oxide layer and then by forming an electrode on the catalyst layer. The catalyst can be deposited in a pattern by irradiating the metal oxide layer with light during immersing the body in the catalytic solution.Type: GrantFiled: July 3, 1991Date of Patent: June 30, 1992Assignee: Akira FujishimaInventors: Akira Fujishima, Shigeo Kondo