Patents by Inventor Kazuchika Ohta
Kazuchika Ohta 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: 8333947Abstract: A method for manufacturing carbon nanotubes includes the steps of: preparing metal-containing-nanofibers which include nanofibers made of organic polymer and metal which possesses a catalytic function in forming carbon nanotubes; and forming carbon nanotubes which contain metal therein by using the nanofibers as a carbon source, wherein the carbon nanotubes are formed by putting the metal-containing-nanofibers into a heating vessel which has a substance capable of converting electromagnetic energy into heat, and by heating the metal-containing-nanofibers using heat which is generated by the heating vessel when electromagnetic energy is applied to the heating vessel.Type: GrantFiled: August 3, 2009Date of Patent: December 18, 2012Assignee: Shinshu UniversityInventors: Kazuchika Ohta, Ick-Soo Kim, Byoung-Suhk Kim, Jongchul Park
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Patent number: 8202504Abstract: A method for manufacturing carbon nanotubes of the present invention includes the steps of: preparing a metal complex which contains at least one metal selected from a group consisting of iron, cobalt and nickel and an organic compound: and forming carbon nanotubes which contain metal therein by using the organic compound as a carbon source, wherein the carbon nanotubes are formed by putting the metal complex into a heating vessel which has a substance capable of converting electromagnetic energy into heat, and by heating the metal complex using heat which is generated by the heating vessel when electromagnetic energy is applied to the heating vessel. As the metal complex used in a method for manufacturing carbon nanotubes of the present invention, nickel stearate or nickel benzoate can be named, for example. According to the method for manufacturing carbon nanotubes of the present invention, it is possible to manufacture carbon nanotubes using an inexpensive heating device within a short time.Type: GrantFiled: August 3, 2009Date of Patent: June 19, 2012Assignee: Shinshu UniversityInventors: Kazuchika Ohta, Ick-Soo Kim, Byoung-Suhk Kim, Jongchul Park
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Patent number: 8192714Abstract: A method for manufacturing carbon nanotubes of the present invention includes the steps of: preparing at least one metal selected from a group consisting of iron, cobalt and nickel and an organic compound: and forming carbon nanotubes by using the organic compound as a carbon source, wherein the metal and the organic compound are put into a heating vessel having a substance capable of converting electromagnetic energy into heat, and the organic compound is brought into contact with the metal in a state where the inside of the heating vessel is heated at a temperature of 600° C. to 900° C. by applying the electromagnetic energy to the heating vessel so as to form the carbon nanotubes.Type: GrantFiled: August 3, 2009Date of Patent: June 5, 2012Assignee: Shinshu UniversityInventors: Kazuchika Ohta, Ick-Soo Kim, Byoung-Suhk Kim, Jongchul Park
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Publication number: 20100296996Abstract: A method for manufacturing carbon nanotubes includes the steps of: preparing metal-containing-nanofibers which include nanofibers made of organic polymer and metal which possesses a catalytic function in forming carbon nanotubes; and forming carbon nanotubes which contain metal therein by using the nanofibers as a carbon source, wherein the carbon nanotubes are formed by putting the metal-containing-nanofibers into a heating vessel which has a substance capable of converting electromagnetic energy into heat, and by heating the metal-containing-nanofibers using heat which is generated by the heating vessel when electromagnetic energy is applied to the heating vessel.Type: ApplicationFiled: August 3, 2009Publication date: November 25, 2010Applicants: SHINSHU UNIVERSITY, FINETEX ENE, INC.Inventors: Kazuchika OHTA, Ick-Soo KIM, Byoung-Suhk KIM, Jongchul PARK
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Publication number: 20100196248Abstract: A method for manufacturing carbon nanotubes of the present invention includes the steps of: preparing a metal complex which contains at least one metal selected from a group consisting of iron, cobalt and nickel and an organic compound: and forming carbon nanotubes which contain metal therein by using the organic compound as a carbon source, wherein the carbon nanotubes are formed by putting the metal complex into a heating vessel which has a substance capable of converting electromagnetic energy into heat, and by heating the metal complex using heat which is generated by the heating vessel when electromagnetic energy is applied to the heating vessel. As the metal complex used in a method for manufacturing carbon nanotubes of the present invention, nickel stearate or nickel benzoate can be named, for example. According to the method for manufacturing carbon nanotubes of the present invention, it is possible to manufacture carbon nanotubes using an inexpensive heating device within a short time.Type: ApplicationFiled: August 3, 2009Publication date: August 5, 2010Applicants: SHINSHU UNIVERSITY, FINETEX ENE, INC.Inventors: Kazuchika OHTA, Ick-Soo KIM, Byoung-Suhk KIM, Jongchul PARK
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Publication number: 20100196247Abstract: A method for manufacturing carbon nanotubes of the present invention includes the steps of: preparing at least one metal selected from a group consisting of iron, cobalt and nickel and an organic compound: and forming carbon nanotubes by using the organic compound as a carbon source, wherein the metal and the organic compound are put into a heating vessel having a substance capable of converting electromagnetic energy into heat, and the organic compound is brought into contact with the metal in a state where the inside of the heating vessel is heated at a temperature of 600° C. to 900° C. by applying the electromagnetic energy to the heating vessel so as to form the carbon nanotubes.Type: ApplicationFiled: August 3, 2009Publication date: August 5, 2010Applicants: SHINSHU UNIVERSITY, FINETEX ENE, INC.Inventors: Kazuchika OHTA, Ick-Soo KIM, Byoung-Suhk KIM, Jongchul PARK
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Patent number: 5714013Abstract: The present invention relates to a method of infusing coloration in solder to facilitate inspection of soldered portions in the production of electronic machinery, equipment and apparatus, and further, a method of forming a colored membrane on the surface of the soldered portions by employing colored solder materials. Physically and chemically stable colored powders composed of rare earth compounds or metallic fluoride compounds, having properties of specific gravity lighter than that of solder and further being indecomposable even at a temperature higher than that of the melting points of solders, are mixed into flux. After soldering by employing solder cream containing the mixture, a colored membrane or layer may be formed on the surface of soldered portions by deposition of the colored powder compounds.Type: GrantFiled: July 29, 1996Date of Patent: February 3, 1998Assignees: Eastern Co., Ltd., Tadashi Utsunomiya, Kazuchika OhtaInventors: Kazuchika Ohta, Tsuyoshi Komatsu
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Patent number: 5650020Abstract: The present invention relates to a method of infusing coloration in solder to facilitate inspection of soldered portions in the production of electronic machinery, equipment and apparatus, and further, a method of forming a colored membrane on the surface of the soldered portions by employing colored solder materials.Physically and chemically stable colored powders composed of rare earth compounds or metallic fluoride compounds, having properties of specific gravity lighter than that of solder and further being indecomposable even at a temperature higher than that of the melting points of solders, are mixed into flux. After soldering by employing solder cream containing the mixture, a colored membrane or layer may be formed on the surface of soldered portions by deposition of the colored powder compounds.Type: GrantFiled: November 16, 1994Date of Patent: July 22, 1997Assignees: Eastern Co., Ltd., Tadashi Utsunomiya, Kazuchika OhtaInventors: Kazuchika Ohta, Tsuyoshi Komatsu
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Patent number: 5110916Abstract: The present invention discloses lanthanide series bisphthalocyanine complex compounds, wherein chemically and thermally stable side chains effective for the development of a functional film due to generation of solubility and liquid crystallization in a solvent.The compounds according to the present invention having no reacting positions at side chains thereof possess electrochromic properties and further possess excellent electrochemical characteristics. Moreover, these compounds are soluble in a solvent and show discotic liquid crystal phase. Therefore, these compounds are very effective for the development of a functional film.Type: GrantFiled: December 21, 1990Date of Patent: May 5, 1992Assignees: Eastern Co., Ltd., Iwawo YamamotoInventors: Iwao Yamamoto, Kazuchika Ohta, Tsuyoshi Komatsu
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Patent number: 5062990Abstract: Octasubstituted tetraphyrazinotetraazaporphrazine and compositions forming an electron acceptable discotic liquid crystal phase are disclosed. Said compounds and the metal complexes are easily soluble in an organic solvent such as chloroform or dichloromethane etc and are insoluble in acetone and alcohols; and therefore a columnar phase by silica gel/dichloromethane, recrystallization from tetra-hydrofuran or refining through solid liquid extraction by acetone is possible. Furthermore, stability in a giant molecular can be expected and a functional membrane can be formed by a solution cast method etc., thereby employing as an electon or photoelectron material or an indication element.Type: GrantFiled: December 27, 1989Date of Patent: November 5, 1991Assignees: Eastern Co., Ltd., Iwawo YamamotoInventors: Iwawo Yamamoto, Kazuchika Ohta