Patents by Inventor Yasunori Taga
Yasunori Taga 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: 20050084707Abstract: Disclosed is the use of a novel coumarin derivative with a specific molecular structure. The physical and optical properties of the coumarin derivative render it very useful as a luminescent agent to be used in highly durable organic EL devices.Type: ApplicationFiled: April 23, 2002Publication date: April 21, 2005Inventors: Makoto Satsuki, Natsuko Ishida, Sadaharu Suga, Hisayoshi Fujikawa, Yasunori Taga
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Patent number: 6835688Abstract: A photocatalytic material, which exhibits photocatalytic activity when exposed to visible light, the material containing Ti—O—N containing nitrogen in lattices of titanium oxide crystal.Type: GrantFiled: February 5, 2002Date of Patent: December 28, 2004Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Takeshi Morikawa, Ryoji Asahi, Takeshi Ohwaki, Yasunori Taga
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Publication number: 20040247949Abstract: In a laminate product formed by an organic member and/or an inorganic member, high strength adhesion between the organic member and the inorganic member is achieved by providing an adhesion layer which includes amorphous carbon nitride (a-CNx:H) particularly between the organic member and the inorganic member. Further, in order to protect a laminate product formed by an organic member and/or an inorganic member, for example, an organic electronic element including an organic compound layer, such as an organic electroluminescence element, a protective film including at least amorphous carbon nitride and a protective layer having a laminate structure formed by sandwiching a vapor deposition inorganic film between plasma polymerized films are used. Thus, a protective film which is optimum to an organic electronic element, having high bending stress resistance, high shielding effect against moisture and oxygen existing in the air, and excellent resistance to high temperature and high humidity can be provided.Type: ApplicationFiled: April 12, 2004Publication date: December 9, 2004Inventors: Kunio Akedo, Koji Noda, Atsushi Miura, Hisayoshi Fujikawa, Yasunori Taga
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Patent number: 6794065Abstract: A photocatalytic material having titanium oxide crystals and anions X incorporated therein, which is prepared by at least one of a method comprising substituting anions X for some of the oxygen sites of titanium oxide crystals, a method comprising doping anions X between lattices of a titanium crystal and a method comprising doping grain boundaries of titanium oxide, or a combination of these method. The photocatalytic material has acquired a new energy level formed in a band gap of titanium oxide, which results in its exhibition of a photocatalytic activity by absorbing visible lights. The photocatalytic material can thus exhibit a satisfactory photocatalytic activity under sunlight and also in a room with a fluorescent lamp.Type: GrantFiled: February 5, 2002Date of Patent: September 21, 2004Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Takeshi Morikawa, Ryoji Asahi, Takeshi Ohwaki, Yasunori Taga
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Publication number: 20040180008Abstract: To eliminate a defect in conventional dental bleaching agent, that light for activating titanium oxide hardly reaches down to the titanium oxide at the teeth surface to be bleached, a dental bleaching agent set consists of two components of which the first component is attached to teeth surface and irradiation of light is followed after the second component is contacted on the teeth surface, the first component consisting of an organic solvent, containing at least one of a titanium oxide, a nitrogen doped titanium oxide, and a titanium oxinitride having photocatalytic activities, and preferably one or more of a metal oxide, a metal salt, and a metal powder, a thickener and water, the second component consisting of a compound that produces hydrogen peroxide in water, a thickener and a carrier.Type: ApplicationFiled: March 4, 2004Publication date: September 16, 2004Applicants: GC CORPORATION, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Shin Yamaguchi, Toshihiro Sekiguchi, Keisuke Ikushima, Shoji Akahane, Koyu Aoki, Takeshi Morikawa, Takeshi Ohwaki, Yasunori Taga
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Patent number: 6743749Abstract: A Ti—O—N film is formed on an SiO2 substrate by sputtering. For example, TiO2 is used as a target and nitrogen gas is introduced into the atmosphere. Crystallization is carried out by a post-sputtering heat treatment. Then a charge separation material such as Pt is supported on the Ti—O—N film. With the fabricated TiO2 crystals, the Ti—O—N film containing nitrogen exhibits a good catalytic reaction by using visible light as acting light. Since the charge separation material captures electrons or positive holes, recombination of electrons and positive holes is effectively prevented, and consequently more efficient photocatalytic reaction is performed. It is preferable to form a photocatalyst material film (Ti—Cr—O—N film) by sputtering the SiO2 substrate by use of TiO2 and Cr as the target in a nitrogen atmosphere. Crystallization is performed by a post-sputtering heat treatment.Type: GrantFiled: July 26, 2002Date of Patent: June 1, 2004Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Takeshi Morikawa, Takahiro Shiga, Ryoji Asahi, Takeshi Ohwaki, Yasunori Taga
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Publication number: 20040047816Abstract: A method for bleaching teeth comprises steps of applying a solution containing nitrogen-deeped titanium oxide powder on a surface of teeth, and irradiating the applied part with light to bleach the teeth based on a photocatalytic action thus produced, and a bleaching agent for teeth suitable for carrying out the method comprises a solution containing nitrogen-deeped titanium oxide powder, in which the nitrogen-deeped titanium oxide is preferably a photocatalytic substance having a Ti—O—N structure having a titanium oxide crystalline lattice containing nitrogen and exhibiting a photocatalytic action in a visible light region, the bleaching agent contains preferably 0.01 to 5% by weight of the nitrogen-deeped titanium oxide powder, the nitrogen-deeped titanium oxide powder has a specific surface area of from 10 to 500 m2/g, the solution contains water and/or an alcohol as a solvent, and the bleaching agent further contains preferably 0.Type: ApplicationFiled: August 21, 2003Publication date: March 11, 2004Applicant: GC CorporationInventors: Shin Yamaguchi, Toshihiro Sekiguchi, Keisuke Ikushima, Shoji Akahane, Koyu Aoki, Takeshi Morikawa, Takeshi Ohwaki, Yasunori Taga
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Patent number: 6680277Abstract: The invention features a photocatalytic body including: a porous medium 12 formed on a substrate 10; and photocatalytic material 14 supported on the porous medium. Supporting the photocatalytic material 14 on the porous medium 12 enables enhancement of its catalytic activity.Type: GrantFiled: July 17, 2001Date of Patent: January 20, 2004Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Takeshi Morikawa, Yasunori Taga, Tadashi Nakamura, Yoshiaki Fukushima
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Publication number: 20030176520Abstract: 4-Cyanocoumarin derivatives which have a distinct sensitivity to visible light, distinct luminescent ability, and satisfactory applicability for photochemical polymerization, dye lasers, and organic electroluminescent elements. Since most of the derivatives have a fluorescent maximum wavelength of 600 to 650 nm, particularly, 610 to 630 nm, they are extremely useful as luminescent agents for organic EL elements which emit visible light in a red-color region, and can be quite useful as luminescent agents in organic EL elements and laser-active substances in dye lasers, as well as luminous bodies as lighting sources for lighting devices, and information displays for visually displaying information.Type: ApplicationFiled: January 21, 2003Publication date: September 18, 2003Applicant: KABUSHIKI KAISHA HAYASHIBARA SEIBUTSU KAGAKU KENKYUJOInventors: Yoshio Taniguchi, Toshiki Koyama, Chihaya Adachi, Tomoyasu Saitou, Makoto Satsuki, Akira Shinpo, Sadaharu Suga, Shizuo Tokito, Hisayoshi Fujikawa, Koji Noda, Atsushi Miura, Yasunori Taga
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Patent number: 6573380Abstract: 4-Cyanocoumarin derivatives which have a distinct sensitivity to visible light, distinct luminescent ability, and satisfactory applicability for photochemical polymerization, dye lasers, and organic electroluminescent elements. Since most of the derivatives have a fluorescent maximum wavelength of 600 to 650 nm, particularly, 610 to 630 nm, they are extremely useful as luminescent agents for organic EL elements which emit visible light in a red-color region, and can be quite useful as luminescent agents in organic EL elements and laser-active substances in dye lasers, as well as luminous bodies as lighting sources for lighting devices, and information displays for visually displaying information.Type: GrantFiled: October 22, 2001Date of Patent: June 3, 2003Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyujoInventors: Yoshio Taniguchi, Toshiki Koyama, Chihaya Adachi, Tomoyasu Saitou, Makoto Satsuki, Akira Shinpo, Sadaharu Suga, Shizuo Tokito, Hisayoshi Fujikawa, Koji Noda, Atsushi Miura, Yasunori Taga
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Publication number: 20030013607Abstract: A Ti—O—N film is formed on an SiO2 substrate by sputtering. For example, TiO2 is used as a target and nitrogen gas is introduced into the atmosphere. Crystallization is carried out by a post-sputtering heat treatment. Then a charge separation material such as Pt is supported on the Ti—O—N film. With the fabricated TiO2 crystals, the Ti—O—N film containing nitrogen exhibits a good catalytic reaction by using visible light as acting light. Since the charge separation material captures electrons or positive holes, recombination of electrons and positive holes is effectively prevented, and consequently more efficient photocatalytic reaction is performed. It is preferable to form a photocatalyst material film (Ti—Cr—O—N film) by sputtering the SiO2 substrate by use of TiO2 and Cr as the target in a nitrogen atmosphere. Crystallization is performed by a post-sputtering heat treatment.Type: ApplicationFiled: July 26, 2002Publication date: January 16, 2003Inventors: Takeshi Morikawa, Takahiro Shiga, Ryoji Asahi, Takeshi Ohwaki, Yasunori Taga
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Patent number: 6416887Abstract: An organic EL element has an anode, a cathode, and one or more organic compound layers sandwiched between the anode and cathode, wherein at least one layer of said organic compound layers includes an organic compound denoted by chemical formula (1), which is more specifically denoted by chemical formulas (2)-(5). By introducing desired substituents at R1-R4, these compounds can be made to demonstrate hole transport function, emissive function, electron transport function, or a combination of those functions. Due to its tendency to be structurally non-planar, the organic compound does not crystallize easily, and has a high glass transition temperature. Use of such a compound in an organic EL element enhances element life.Type: GrantFiled: July 11, 2000Date of Patent: July 9, 2002Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Shizuo Tokito, Koji Noda, Hisayoshi Fujikawa, Masahiko Ishii, Yasunori Taga, Makoto Kimura, Yasuhiko Sawaki
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Patent number: 6406801Abstract: An optical resonator type organic electroluminescent element has a multilayered film mirror 30, a transparent electrode 12, an electron hole transportation layer 14 and a luminescent layer 16 configuring an organic layer, and a metallic electrode mirror 20, formed on a glass substrate 10. The optical resonator type organic electroluminescent element amplifies a specific wavelength (especially, in a range of about 30 nm toward a shorter wavelength side from a luminescence peak wavelength of the organic layer) in luminescence light by a minute optical resonator, which comprises the multilayered film mirror 30 and the metallic electrode mirror 20. It is determined that the minute optical resonator has an optical length L which is twice as long as a resonance wavelength, the organic layer has a thickness of 100 nm or more, and the transparent electrode has a thickness of 50 nm or more or a thickness so to have a sheet resistance of 30 &OHgr;/□ or less.Type: GrantFiled: February 3, 1999Date of Patent: June 18, 2002Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Shizuo Tokito, Koji Noda, Hisayoshi Fujikawa, Yasunori Taga
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Publication number: 20020052501Abstract: 4-Cyanocoumarin derivatives which have a distinct sensitivity to visible light, distinct luminescent ability, and satisfactory applicability for photochemical polymerization, dye lasers, and organic electroluminescent elements. Since most of the derivatives have a fluorescent maximum wavelength of 600 to 650 nm, particularly, 610 to 630 nm, they are extremely useful as luminescent agents for organic EL elements which emit visible light in a red-color region, and can be quite useful as luminescent agents in organic EL elements and laser-active substances in dye lasers, as well as luminous bodies as lighting sources for lighting devices, and information displays for visually displaying information.Type: ApplicationFiled: October 22, 2001Publication date: May 2, 2002Applicant: KABUSHIKI KAISHA HAYASHIBARA SEIBUTSU KAGAKU KENKYUJOInventors: Yoshio Taniguchi, Toshiki Koyama, Chihaya Adachi, Tomoyasu Saitou, Makoto Satsuki, Akira Shinpo, Sadaharu Suga, Shizuo Tokito, Hisayoshi Fujikawa, Koji Noda, Atsushi Miura, Yasunori Taga
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Patent number: 6355773Abstract: The invention features a functional polymer which provides three primary colors and is free from aggregation of high molecular chains. The functional polymer is obtained by copolymerization of fluorene unit and acene unit having three or more benzene rings or hetero rings, and has the structure denoted by the following formula: wherein A through H are selected from alkyl, thioalkyl, alkoxy, aryl, aryloxy, or the like; I and K through W are selected from C, O, N, P, S, and Si, R1 and R2 are selected from alkyl (iso or normal), cycloalkyl, acyl, or the like; p and q are integer numbers which satisfy p+q≧2; and n and m are integers equal to or greater than 1.Type: GrantFiled: November 22, 2000Date of Patent: March 12, 2002Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Karl-Heinz Weinfurtner, Hisayoshi Fujikawa, Shizuo Tokito, Yasunori Taga
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Publication number: 20020006865Abstract: The invention features a photocatalytic body including: a porous medium 12 formed on a substrate 10; and photocatalytic material 14 supported on the porous medium. Supporting the photocatalytic material 14 on the porous medium 12 enables enhancement of its catalytic activity.Type: ApplicationFiled: July 17, 2001Publication date: January 17, 2002Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Takeshi Morikawa, Yasunori Taga, Tadashi Nakamura, Yoshiaki Fukushima
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Patent number: 6259423Abstract: For use in a display device, a simple-matrix-drive-type luminescent panel is formed by stacking a dielectric mirror layer, a transparent electrode, a hole transport layer, a luminous layer, and a metal electrode on a glass substrate, wherein the transparent electrode is formed as a plurality of stripes equally spaced apart a specified distance from each other, and the metal electrode is formed as a plurality of stripes equally spaced apart a specified distance from each other and arranged at right angles with the transparent electrode stripes, and pixels are formed at intersections of the metal electrodes and the transparent electrodes and wherein in order for the pixels of the panel to emit light to display information, the application of a voltage to the pixels is controlled by selection of the electrodes according to information. This luminescent panel contributes to reductions in size and weight of the display device.Type: GrantFiled: August 17, 1998Date of Patent: July 10, 2001Assignee: Kabushiki Kaisha Toyoto Chuo KenkyushoInventors: Shizuo Tokito, Yasunori Taga
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Patent number: 6187445Abstract: A birefringent plate includes a transparent glass substrate, an antireflection coating formed on one of the surfaces of the glass substrate, an obliquely deposited film formed on the other one of the surfaces of the glass substrate by obliquely deposition of a dielectric material with respect to the normal of the glass substrate, and a protective film formed on the obliquely deposited film for holding the occluded water of the obliquely deposited film within the obliquely deposited film and reducing the light interference between the opposite surface of the glass substrate and the surface of the obliquely deposited film. The antireflection coating and the protective film inhibit the phase difference from fluctuating at different measurement positions when the phase difference is measured by using a light source, such as a laser beam. In addition, the protective film makes the birefringent plate less dependent on the temperature.Type: GrantFiled: May 28, 1999Date of Patent: February 13, 2001Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Tadayoshi Ito, Yasunori Taga, Motofumi Suzuki
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Patent number: 6036823Abstract: A thin-film electroluminescent device includes dielectric layers having improved dielectric characteristics. The device is fabricated by forming a first transparent electrode layer of ITO, a first dielectric layer, a luminescent layer, a second dielectric layer, and a second transparent electrode layer of ITO in this order on an insulating substrate. Each of the two dielectric layers is a film constituted by TaSnON. That is, the film includes tantalum, tin, oxygen, and nitrogen.Type: GrantFiled: July 30, 1998Date of Patent: March 14, 2000Assignee: Denso CorporationInventors: Kazuhiro Inoguchi, Yutaka Hattori, Nobuei Ito, Tomoya Uchida, Tadashi Hattori, Koji Noda, Hisayoshi Fujikawa, Shizuo Tokito, Yasunori Taga
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Patent number: 5940314Abstract: A ultra-high density memory device utilizing a photoinductive ferromagnetic thin film. A photoinductive ferromagnetic thin film is formed on a GaAs substrate, and a tip is arranged so as to face the photoinductive ferromagnetic thin film. The GaAs substrate is disposed on an xyz scanner, and the three-dimensional positional relationship between the GaAs substrate and the tip is changed by the xyz scanner. Blue light is radiated onto the thin film in order to make the magnetization orientation of molecules uniform. Through application of a relatively high voltage, a relatively large current is caused to flow between the tip and the substrate, so that randomization of the magnetization orientation of molecules of the photoinductive ferromagnetic thin film; i.e., writing operation is carried out.Type: GrantFiled: January 20, 1998Date of Patent: August 17, 1999Assignee: Kabushiki Kaisha Toyota Chuo KenkyushoInventors: Motofumi Suzuki, Takeshi Ohwaki, Yasunori Taga, Hiroshi Tadano, Testu Kachi, Yuichi Tanaka, Kazuyoshi Tomita