Patents by Inventor Ken-ichi Nakayama
Ken-ichi Nakayama 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: 9608217Abstract: The present invention provides a transistor element having a laminated structure, the laminated structure comprising a sheet-like base electrode being arranged between an emitter electrode and a collector electrode; at least one p-type organic semiconductor layer being provided on each of the surface and the back sides of the base electrode; and a current transmission promotion layer being formed, on each of the surface and back sides of the base electrode, between the base electrode and the p-type organic semiconductor layer or layers provided on each of the surface and back sides of the base electrode. According to the present invention, it becomes possible to provide a transistor element (MBOT) that is, in particular, stably supplied through a simple production process, has a structure capable of being mass-produced, and has a large current modulation effect and an excellent ON/OFF ratio at a low voltage in the emitter electrode and the collector electrode.Type: GrantFiled: April 27, 2012Date of Patent: March 28, 2017Assignees: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.Inventors: Ken-ichi Nakayama, Junji Kido, Ryotaro Akiba, Naomi Oguma, Naoki Hirata
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Publication number: 20150325805Abstract: The present invention provides a transistor element having a laminated structure, the laminated structure comprising a sheet-like base electrode being arranged between an emitter electrode and a collector electrode; at least one p-type organic semiconductor layer being provided on each of the surface and the back sides of the base electrode; and a current transmission promotion layer being formed, on each of the surface and back sides of the base electrode, between the base electrode and the p-type organic semiconductor layer or layers provided on each of the surface and back sides of the base electrode. According to the present invention, it becomes possible to provide a transistor element (MBOT) that is, in particular, stably supplied through a simple production process, has a structure capable of being mass-produced, and has a large current modulation effect and an excellent ON/OFF ratio at a low voltage in the emitter electrode and the collector electrode.Type: ApplicationFiled: April 27, 2012Publication date: November 12, 2015Applicants: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.Inventors: Ken-ichi NAKAYAMA, Junji KIDO, Ryotaro AKIBA, Naomi OGUMA, Naoki HIRATA
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Patent number: 8927972Abstract: A current-amplifying transistor device is provided, between an emitter electrode and a collector electrode, with two organic semiconductor layers and a sheet-shaped base electrode. One of the organic semiconductor layers is arranged between the emitter electrode and the base collector electrode, and has a diode structure of a p-type organic semiconductor layer and an n-type p-type organic semiconductor layer. A current-amplifying, light-emitting transistor device including the current-amplifying transistor device and an organic EL device portion formed in the current-amplifying transistor device is also disclosed.Type: GrantFiled: September 3, 2010Date of Patent: January 6, 2015Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Ken-ichi Nakayama, Junji Kido, Yong-Jin Pu, Fumito Suzuki, Naomi Oguma, Naoki Hirata
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Patent number: 8895963Abstract: An organic semiconductor material is represented by the following formula (F): wherein A represents a cyclic conjugated skeleton structure formed of one or more aromatic rings, and R1 and R2 each independently represent a substituted or unsubstituted alkyl group. The organic semiconductor material has high electron mobility and high on/off ratio, and can form an organic semiconductor thin film by a solution process making use of its solution.Type: GrantFiled: May 11, 2010Date of Patent: November 25, 2014Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Ken-ichi Nakayama, Junji Kido, Yong-Jin Pu, Yohei Hashimoto, Naomi Oguma, Naoki Hirata
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Publication number: 20120146011Abstract: A current-amplifying transistor device is provided, between an emitter electrode and a collector electrode, with two organic semiconductor layers and a sheet-shaped base electrode. One of the organic semiconductor layers is arranged between the emitter electrode and the base collector electrode, and has a diode structure of a p-type organic semiconductor layer and an n-type p-type organic semiconductor layer. A current-amplifying, light-emitting transistor device including the current-amplifying transistor device and an organic EL device portion formed in the current-amplifying transistor device is also disclosed.Type: ApplicationFiled: September 3, 2010Publication date: June 14, 2012Applicants: KEN-ICHI NAKAYAMA, DAINICHISEIKA COLOR & CHEMICALS Mfg.Co., Ltd.Inventors: Ken-ichi Nakayama, Junji Kido, Yong-Jin Pu, Fumito Suzuki, Naomi Oguma, Naoki Hirata
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Publication number: 20120056166Abstract: An organic semiconductor material is represented by the following formula (F): wherein A represents a cyclic conjugated skeleton structure formed of one or more aromatic rings, and R1 and R2 each independently represent a substituted or unsubstituted alkyl group. The organic semiconductor material has high electron mobility and high on/off ratio, and can form an organic semiconductor thin film by a solution process making use of its solution.Type: ApplicationFiled: May 11, 2010Publication date: March 8, 2012Applicants: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Ken-ichi Nakayama, Junji Kido, Yong-Jin Pu, Yohei Hashimoto, Naomi Oguma, Naoki Hirata
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Publication number: 20110008726Abstract: Provided is a process for producing a toner comprising steps of: dispersing a polymerizable monomer composition containing a polymerizable monomer, a polar resin, a colorant, and a wax component in a aqueous dispersion medium to granulate the polymerizable monomer composition; and polymerizing the polymerizable monomer, wherein the polymerizable monomer is a vinyl-based polymerizable monomer, the polar resin is a styrene-methacrylic acid copolymer or styrene-acrylic acid copolymer; the polymerizable monomer composition contains 0.0050 to 0.025 mass % of divinylbenzene; and the toner has a glass transition temperature (TgA) measured with a differential scanning calorimeter (DSC) of 40° C. or higher and 60° C. or lower and a peak temperature (P1) of a highest endothermic peak measured with the DSC of 70° C. or higher and 110° C. or lower, and P1 and TgA satisfy a relationship of 15° C.?(P1?TgA)?70° C.Type: ApplicationFiled: September 22, 2010Publication date: January 13, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Yasushi Katsuta, Koji Inaba, Ken-ichi Nakayama, Kenta Kamimura
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Patent number: 7846631Abstract: Provided is a toner including toner particles each containing at least a binder resin, a colorant, and a wax component, and an inorganic fine powder, the toner being wherein: in a microscopic compression test on the toner, a recovery ratio Z(25) and the gradient of a load-displacement curve R(25) each satisfy a specific range; and the toner has a glass transition temperature (TgA) measured with a differential scanning calorimeter (DSC) in a specific range and a temperature (P1) of the highest endothermic peak measured with the DSC in a specific range, and the temperature (P1) of the highest endothermic peak and the glass transition temperature (TgA) satisfy a specific relationship.Type: GrantFiled: January 20, 2009Date of Patent: December 7, 2010Assignee: Canon Kabushiki KaishaInventors: Yasushi Katsuta, Koji Inaba, Ken-ichi Nakayama, Kenta Kamikura
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Publication number: 20100035171Abstract: Provided is a yellow toner having toner particles each containing at least a binder resin, a colorant, and a polar resin, the yellow toner being characterized in that: the colorant is a coloring compound having a specific structure; in a microscopic compression test at a measurement temperature of 25° C., the toner has a recovery ratio Z(25) of 40 to 80%; and the toner has a glass transition temperature (TgA) measured with a differential scanning calorimeter (DSC) of 40° C. to 60° C. and a temperature (P1) of the highest endothermic peak measured with the DSC of 70° C. to 90° C., and the temperature (P1) of the highest endothermic peak and the glass transition temperature (TgA) satisfy the relationship of 15° C.?P1?TgA?50° C.Type: ApplicationFiled: June 15, 2009Publication date: February 11, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Shuntaro Watanabe, Yuji Moriki, Ken-ichi Nakayama, Koji Inaba, Masayoshi Kato, Masatake Tanaka, Takayuki Toyoda
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Publication number: 20090130583Abstract: Provided is a toner including toner particles each containing at least a binder resin, a colorant, and a wax component, and an inorganic fine powder, the toner being wherein: in a microscopic compression test on the toner, a recovery ratio Z(25) and the gradient of a load-displacement curve R(25) each satisfy a specific range; and the toner has a glass transition temperature (TgA) measured with a differential scanning calorimeter (DSC) in a specific range and a temperature (P1) of the highest endothermic peak measured with the DSC in a specific range, and the temperature (P1) of the highest endothermic peak and the glass transition temperature (TgA) satisfy a specific relationship.Type: ApplicationFiled: January 20, 2009Publication date: May 21, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Yasushi Katsuta, Koji Inaba, Ken-ichi Nakayama, Kenta Kamimura
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Patent number: 7198932Abstract: The present invention relates to a gene for an enzyme involving in the synthesis of GDP-L-fucose. Particularly, the present invention relates to a GDP-4-keto-6-deoxy-D-mannose-3, 5-epimerase-4-reductase gene derived from Arabidopsis thaliana, and a process for producing GDP-L-fucose using the gene. An enzyme encoded by the gene is (a) a protein comprising an amino acid sequence represented by SEQ ID NO: 1; or (b) a protein comprising an amino acid sequence derived from the amino acid sequence of SEQ ID NO: 1 by deletion, substitution, addition or insertion of one or several amino acid residues, and having GDP-4-keto-6-deoxy-D-mannose-3, 5-epimerase-4-reductase activity. The present invention enables efficient mass production of GDP-L-fucose which is essential in performing addition of fucose, which has a very important function in sugar chains.Type: GrantFiled: March 30, 2000Date of Patent: April 3, 2007Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Ken-ichi Nakayama, Yoshifumi Jigami
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Patent number: 6878960Abstract: A resin-dispersed organic semiconductor layer (3) is formed on a lower electrode (2) of an ITO transparent electrode formed on a glass substrate (1). An upper electrode (4) of a gold deposited film is formed on the resin-dispersed organic semiconductor layer (3). The resin-dispersed organic semiconductor layer (3) is formed by spin-coating a dispersion liquid prepared by mixing a perylene pigment and polycarbonate in a THF solvent and drying the coating. By applying a voltage by means of the electrodes (2, 4) and by irradiating the resin-dispersed organic semiconductor layer (3) with light, a multiplied light irradiation-induced current flows.Type: GrantFiled: March 23, 2001Date of Patent: April 12, 2005Assignee: Japan Science and Technology CorporationInventors: Masaaki Yokoyama, Ken-ichi Nakayama, Masahiro Hiramoto
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Publication number: 20030180998Abstract: A resin-dispersed organic semiconductor layer (3) is formed on a lower electrode (2) of an ITO transparent electrode formed on a glass substrate (1). An upper electrode (4) of a gold deposited film is formed on the resin-dispersed organic semiconductor layer (3). The resin-dispersed organic semiconductor layer (3) is formed by spin-coating a dispersion liquid prepared by mixing a perylene pigment and polycarbonate in a THF solvent and drying the coating. By applying a voltage by means of the electrodes (2, 4) and by irradiating the resin-dispersed organic semiconductor layer (3) with light, a multiplied light irradiation-induced current flows.Type: ApplicationFiled: February 27, 2003Publication date: September 25, 2003Inventors: Masaaki Yokohama, Ken-ichi Nakayama, Masahiro Hiramoto
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Patent number: 5854031Abstract: The present invention relates to a mannose-1-phosphate transferase gene from yeast (Saccharomyces cerevisiae), a process for producing a mannose-1-phosphate-containing acidic sugar chain which comprises culturing yeast cells transformed with a plasmid DNA containing said gene, obtaining mannose-1-phosphate transferase from the culture, and allowing the enzyme to act on a neutral core sugar chain in vivo or in vitro, and a process for producing a phosphate-containing acidic sugar chain which comprises removal of a mannose moiety by acid-treatment of said mannose-1-phosphate-containing acidic sugar chain. According to the present invention, an acidic sugar chain having mannose-1-phosphate added to the same neutral core sugar chain as a high mannose type sugar chain produced by mammalian (e.g. human) cells can be produced in large amounts with high purity by genetic engineering means using yeast.Type: GrantFiled: November 14, 1996Date of Patent: December 29, 1998Assignee: Director--General of Agency of Industrial Science and TechnologyInventors: Yoshifumi Jigami, Ken-ichi Nakayama, Yoh-ichi Shimma, Xiao-hui Wang