Patents by Inventor Kazuhiro Hirao
Kazuhiro Hirao 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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Publication number: 20160244888Abstract: An anode for oxygen generation and a manufacturing method for the same used for industrial electrolyses including manufacturing of electrolytic metal foils such as electrolytic copper foil, aluminum liquid contact and continuously electrogalvanized steel plate, and metal extraction is provided. The anode for oxygen generation and a manufacturing method for the same comprises a conductive metal substrate and a catalyst layer containing iridium oxide formed on the conductive metal substrate wherein the coating is baked in a high temperature region of 410° C.-450° C. in an oxidation atmosphere to form the catalyst layer co-existing amorphous and crystalline iridium oxide and the catalyst layer co-existing the amorphous and crystalline iridium oxide is post-baked in a further high temperature region of 520° C.-560° C. in an oxidation atmosphere to crystallize almost all amount of iridium oxide in the catalyst layer.Type: ApplicationFiled: May 5, 2016Publication date: August 25, 2016Inventors: Yi CAO, Akihiro KATO, Kazuhiro HIRAO, Takashi FURUSAWA
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Patent number: 9011041Abstract: A subirrigation system 10 includes a water-impervious member 16, and keeps water content in soil of a cultivated land 200 in a proper state for growing a plant. The water-impervious member 16 is formed into an upper opening vessel shape, and has a water reserving function. Water is fed to an inner portion of the water-impervious member 16 from a water tank 12 via a feed water pipe 14, whereby a soil portion 26 in a gravitational water state is formed. A water level 28 of the gravitational water within the water-impervious member 16 is properly controlled to a desired water level by a water level controller 18 provided in the feed water pipe 14. The gravitational water within the water-impervious member 16 controlled to the desired water level is appropriately sucked up to the soil in an upper layer in accordance with a capillary phenomenon. Accordingly, a soil portion 30 in a capillary water state having proper water content is formed in the cultivated land 200.Type: GrantFiled: August 25, 2008Date of Patent: April 21, 2015Assignees: Kubota-C.I. Co., Ltd., Paddy Research Co., Ltd.Inventors: Naoki Ono, Hiroaki Sakamoto, Kazuhiro Hirao, Toshinobu Kakita, Yasushi Wada, Yoshihito Fujii, Tsuneo Onodera
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Publication number: 20140374249Abstract: The present invention aims to provide an anode for oxygen generation and a manufacturing method for the same used for industrial electrolyses including manufacturing of electrolytic metal foils such as electrolytic copper foil, aluminum liquid contact and continuously electrogalvanized steel plate, and metal extraction. The present invention features an anode for oxygen generation and a manufacturing method for the same comprising a conductive metal substrate and a catalyst layer containing iridium oxide formed on the conductive metal substrate wherein the coating is baked in a high temperature region of 410° C.-450° C. in an oxidation atmosphere to form the catalyst layer co-existing amorphous and crystalline iridium oxide and the catalyst layer co-existing the amorphous and crystalline iridium oxide is post-baked in a further high temperature region of 520° C.-560° C. in an oxidation atmosphere to crystallize almost all amount of iridium oxide in the catalyst layer.Type: ApplicationFiled: December 25, 2012Publication date: December 25, 2014Inventors: Yi Cao, Akihiro Kato, Kazuhiro Hirao, Takashi Furusawa
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Publication number: 20140353148Abstract: The present invention aims to provide an anode for oxygen generation and a manufacturing method for the same used for industrial electrolyses including manufacturing of electrolytic metal foils such as electrolytic copper foil, aluminum liquid contact and continuously electrogalvanized steel plate, and metal extraction. The present invention features an anode for oxygen generation and a manufacturing method for the same comprising a conductive metal substrate and a catalyst layer containing iridium oxide formed on the conductive metal substrate wherein the coating is baked in a low temperature region of 370° C.-400° C. in an oxidation atmosphere to form the catalyst layer containing amorphous iridium oxide and the catalyst layer containing amorphous iridium oxide is post-baked in a further high temperature region of 520° C.-600° C. in an oxidation atmosphere to crystallize almost all amount of iridium oxide in the catalyst layer.Type: ApplicationFiled: December 25, 2012Publication date: December 4, 2014Inventors: Yi Cao, Akihiro Kato, Kazuhiro Hirao, Takashi Furusawa
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Publication number: 20100296870Abstract: A subirrigation system 10 includes a water-impervious member 16, and keeps water content in soil of a cultivated land 200 in a proper state for growing a plant. The water-impervious member 16 is formed into an upper opening vessel shape, and has a water reserving function. Water is fed to an inner portion of the water-impervious member 16 from a water tank 12 via a feed water pipe 14, whereby a soil portion 26 in a gravitational water state is formed. A water level 28 of the gravitational water within the water-impervious member 16 is properly controlled to a desired water level by a water level controller 18 provided in the feed water pipe 14. The gravitational water within the water-impervious member 16 controlled to the desired water level is appropriately sucked up to the soil in an upper layer in accordance with a capillary phenomenon. Accordingly, a soil portion 30 in a capillary water state having proper water content is formed in the cultivated land 200.Type: ApplicationFiled: August 25, 2008Publication date: November 25, 2010Applicants: KUBOTA-C.I. CO., LTD., PADDY RESEARCH CO., LTD.Inventors: Naoki Ono, Hiroaki Sakamoto, Kazuhiro Hirao, Toshinobu Kakita, Yasushi Wada, Yoshihito Fujii, Tsuneo Onodera
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Patent number: 5143593Abstract: A method of copper-plating a material whereby electrolysis is performed using an electrolytic plating cell including a diaphragm which separates an anode chamber having therein an insoluble metal electrode as an anode from a cathode chamber having therein the material to be plated as a cathode, and further using an electrolyte solution containing copper ions and an additive, wherein the electrolyte is fed to the cathode chamber in a manner such that the copper ion concentration in the electrolyte within the cathode chamber is kept constant and electrolyte is further fed to the anode chamber at a rate of from about 0.2 to 11 ml/KAh.Type: GrantFiled: June 18, 1991Date of Patent: September 1, 1992Assignee: Permelec Electrode Ltd.Inventors: Kenichi Ueno, Kazuhiro Hirao, Genzo Yamane
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Patent number: 5102521Abstract: According to the present invention, an upper electrode and a lower electrode are integrally assembled with insoluble electrodes and diaphragmn in diaphragm electrode structure. Small holes are furnished on the upper electrode, and the diaphragm of the upper electrode is installed obliquely with degassing means. By simply carrying the objects to be plated in horizontal direction, uniform and high quality electroplating can be continuously performed with extensive increase in productivity, while enjoying all of the benefits such as shorter interpolar distance between two electrodes, compact design of the apparatus, saving of expensive additives, etc. Further, the inspection of the diaphragm and the like can be rapidly and easily accomplished, and perfect protection of the diaphragm is assured, thus providing a horizontal carrying type electroplating apparatus suitable for practical use.Type: GrantFiled: August 5, 1991Date of Patent: April 7, 1992Assignees: Almex Inc., Permelec Electrode Ltd.Inventors: Hitoshi Usuda, Ryoei Yamakawa, Kenichi Ueno, Kazuhiro Hirao
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Patent number: 5059297Abstract: An electrode for use in electrolysis is disclosed, which comprises a metallic substrate having formed on the surfaces thereof, in sequence, an amorphous layer free of grain boundaries, and an active electrode material coating. The electrode shows excellent durability even when used in electrolysis accompanied by oxygen evolution. A process for producing the electrode is also disclosed.Type: GrantFiled: March 20, 1990Date of Patent: October 22, 1991Assignee: Permelec Electrode Ltd.Inventors: Kazuhiro Hirao, Takanobu Hayashi
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Patent number: 4925538Abstract: A method of electrolytically treating metals with an a.c. current or alternating pulsive current using an electrode comprising a metal substrate having a coating that comprises an oxide of ruthenium, iridium or rhodium as a counter electrode.Type: GrantFiled: September 5, 1989Date of Patent: May 15, 1990Assignee: Permelec Electrode Ltd.Inventors: Yukiei Matsumoto, Yoshinori Nishiki, Kazuhiro Hirao, Takayuki Shimamune
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Patent number: 4584084Abstract: An electrolytic electrode which exhibits high durability when used in electrochemical processes in which the generation of oxygen is involved and a process for the production of the same. The electrolytic electrode comprises(a) an electrode substrate of an electrically-conductive metal;(b) an electrode coating of an electrode active substance; and(c) an intermediate layer provided between the electrode substrate (a) and the electrode coating (b), wherein the intermediate layer (c) comprises a mixed oxide of(i) an oxide of at least one member selected from the group consisting of titanium (Ti) and tin (Sn), each having a valence number of 4, in an amount of 60 to 95% by weight based on the weight of metal, and(ii) an oxide of at least one member selected from the group consisting of aluminum (Al), gallium (Ga), iron (Fe), cobalt (Co), nickel (Ni) and Thallium (Tl), each having a valence number of 2 or 3, in an amount of about 5 to about 40% by weight based on the weight of metal.Type: GrantFiled: March 4, 1985Date of Patent: April 22, 1986Assignee: Permelec Electrode Ltd.Inventors: Hiroshi Asano, Takayuki Shimamune, Kazuhiro Hirao, Ryuta Hirayama
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Patent number: 4581117Abstract: An electrolytic electrode which exhibits high durability when used in electrochemical processes in which the generation of oxygen is involved and a process for the production of the same. The electrolytic electrode comprises(a) an electrode substrate of an electrically-conductive metal;(b) an electrode coating of an electrode active substance; and(c) an intermediate layer provided between the electrode substrate (a) and the electrode coating (b), wherein the intermediate layer (a) comprises a mixed oxide of:(i) an oxide of at least one member selected from the group consisting of titanium (Ti) and tin (Sn), each having a valence number of 4, and(ii) an oxide of at least one member selected from the group consisting of aluminum (Al), gallium (Ga), iron (Fe), cobalt (Co), nickel (Ni) and Thallium (Tl), each having a valence number of 2 or 3, and platinum (Pt) dispersed in said mixed oxide.Type: GrantFiled: March 4, 1985Date of Patent: April 8, 1986Assignee: Permelec Electrode Ltd.Inventors: Hiroshi Asano, Takayuki Shimamune, Kazuhiro Hirao, Ryuta Hirayama
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Patent number: 4578160Abstract: A method for electrolyzing a dilute caustic alkali aqueous solution in an electrolytic cell partitioned by a cation exchange membrane using iron, nickel or their base alloys as an electrode, and an apparatus thereof whereby the polarities of the electrodes are periodically reversed.Type: GrantFiled: March 19, 1984Date of Patent: March 25, 1986Assignee: Permelec Electrode Ltd.Inventors: Hiroshi Asano, Takayuki Shimamune, Kazuhiro Hirao
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Patent number: 4554176Abstract: An electrode comprising a substrate of a conducting metal, a coat of an electrode active substrate, and a layer interposed between the substrate and the coat to serve as a protective barrier for the substrate acquires improved durability by using, as the intermediate layer, a layer having platinum dispersed in a mixed oxide consisting of an oxide of at least one metal selected from the group consisting of titanium and tin, each having a valence of 4, and an oxide of at least one metal selected from the group consisting of tantalum and niobium, each having a valence of 5.Type: GrantFiled: April 23, 1984Date of Patent: November 19, 1985Assignee: Permelec Electrode Ltd.Inventors: Hiroshi Asano, Takayuki Shimamune, Kazuhiro Hirao, Ryuta Hirayama
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Patent number: 4502931Abstract: A process for the production of electrolytic ion exchange membranes with a coating, comprising coarsening the surface of an ion exchange membrane by an ion-etching treatment and, thereafter, coating the coarsened surface with a substance with a low electrochemical activity. The use of these ion exchange membranes greatly reduces the electrolytic voltage while maintaining a high current efficiency, and enables electrolysis to be performed in a stable manner over a long period of time.Type: GrantFiled: April 7, 1983Date of Patent: March 5, 1985Assignee: Permelec Electrode Ltd.Inventors: Hiroshi Asano, Takayuki Shimamune, Kazuhiro Hirao
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Patent number: 4481097Abstract: An electrode comprising a substrate of a conducting metal, a coat of an electrode active substrate, and a layer interposed between the substrate and the coat to serve as a protective barrier for the substrate acquires improved durability by using, as the intermediate layer, a layer having platinum dispersed in a mixed oxide consisting of an oxide of at least one metal selected from the group consisting of titanium and tin, each having a valence of 4, and an oxide of at least one metal selected from the group consisting of tantalum and niobium, each having a valence of 5.Type: GrantFiled: January 31, 1984Date of Patent: November 6, 1984Assignee: Permelec Electrode LtdInventors: Hiroshi Asano, Takayuki Shimamune, Kazuhiro Hirao, Ryuta Hirayama
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Patent number: 4235684Abstract: A process for producing glyoxalic acid which comprises electrolytically oxidizing glyoxal in an electrolytic cell comprising at least one anode, at least one cathode and at least one cation exchange membrane therebetween to define an anode compartment(s) and a cathode compartment(s) therein, using an aqueous solution containing glyoxal and halogen ions as an anolyte solution and an aqueous solution containing an inorganic or organic electrolyte as a catholyte solution.Type: GrantFiled: November 29, 1979Date of Patent: November 25, 1980Assignees: Chlorine Engineers Corp., Ltd., Daicel Chemical Industries Ltd.Inventors: Hiroyuki Harada, Kazuhiro Hirao, Tadayuki Mitani, Masaaki Ichino