Patents by Inventor Hisashi Shoda
Hisashi Shoda 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: 8309196Abstract: An optical recording medium having excellent light resistance that includes a substrate; and a recording layer which is provided on the substrate directly or on another layer provided on the substrate, wherein the recording layer is capable of recording and/or reading information by irradiating light thereon, the recording layer including a metal complex compound comprising an azo compound having a coupler component with a Meldrum's acid structure and a diazo component with a nitrogen-containing heterocyclic aromatic ring structure, and a metal ion coordinated to the azo compound.Type: GrantFiled: August 25, 2011Date of Patent: November 13, 2012Assignee: Mitsubishi Kagaku Media Co., Ltd.Inventors: Takashi Miyazawa, Yutaka Kurose, Hisashi Shoda, Kenichi Satake, Yukiko Takahashi, Mayumi Kimura, Naoyuki Uchida, Hideki Tamagawa
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Publication number: 20110311752Abstract: [Problem]: An optical recording medium having a capability of recording and/or reading high density optical information using a short wavelength laser light is provided. [Means to Address the Problem]: The optical recording medium has a capability of recording and/or reading high density optical information using a short wavelength laser light having a wavelength of 350 nm to 530 nm. The optical recording medium has a recording layer containing a metal complex compound and formed on a substrate. The metal complex compound is composed of a cyclic ?-diketone azo compound represented by the general formula (I) or general formula (II) and a divalent metal ion coordinated to the cyclic ?-diketone azo compound.Type: ApplicationFiled: August 25, 2011Publication date: December 22, 2011Applicant: Mitsubishi Kagaku Media Co., Ltd.Inventors: Takashi MIYAZAWA, Yutaka KUROSE, Hisashi SHODA, Kenichi SATAKE, Yukiko TAKAHASHI, Mayumi KIMURA, Naoyuki UCHIDA, Hideki TAMAGAWA
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Patent number: 8075976Abstract: An optical recording medium having excellent light resistance that includes a substrate; and a recording layer which is provided on the substrate directly or on another layer provided on the substrate, wherein the recording layer is capable of recording and/or reading information by irradiating light thereon, the recording layer includes a metal complex compound with an azo compound having a coupler component with indandione and a diazo component with a nitrogen-containing heterocyclic aromatic ring structure, and a nickel or cobalt ion coordinated to the azo compound.Type: GrantFiled: July 11, 2006Date of Patent: December 13, 2011Assignee: Mitsubishi Kagaku Media Co., Ltd.Inventors: Takashi Miyazawa, Yutaka Kurose, Hisashi Shoda, Kenichi Satake, Yukiko Takahashi, Mayumi Kimura, Naoyuki Uchida, Hideki Tamagawa
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Patent number: 7989139Abstract: The azo-metal chelate dye to which the present invention is applied is a compound formed as follows: for example, 1,3,4-thiadiazole ring is selected as the diazo component; the diazo component is combined with a coupler component having condensed rings including a fluorine-substituted alkylsulfonylamino group and an amino group, to form an azo dye compound; and the azo dye compound forms chelate bonds with at least one metal selected from the group consisting of Co, Ni, Cu and Pd. Here, two absorption bands (OD1 and OD2) are seen in the absorption spectrum, which is measured in a range of 400 to 800 nm wavelengths. The azo-metal chelate dye is characterized in that the optical density ratio (OD2/OD1) of the two absorption bands is greater than 1.25. By using this azo-metal chelate dye, an optical recording medium capable of high-speed recording is provided.Type: GrantFiled: June 10, 2009Date of Patent: August 2, 2011Assignee: Mitsubishi Kagaku Media Co., Ltd.Inventors: Kenichi Satake, Yuko Naitou, Hisashi Shoda, Yuki Suzuki
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Publication number: 20110069595Abstract: To provide a dye to be used for an optical recording medium excellent in both high speed recording characteristics and reproduction durability. A dye having an azo compound represented by the following formula coordinated to a metal ion: wherein the ring A represents a nitrogen-containing heteroaromatic ring containing a carbon atom and a nitrogen atom; X represents C—R1R2, an oxygen atom, a sulfur atom or N—R3, wherein each of R1, R2 and R3 which are independent of one another, represents a hydrogen atom, a linear or branched alkyl group, an aralkyl group, a cycloalkyl group, a linear or branched alkenyl group, an aryl group or an acyl group represented by —COR4, wherein R4 is a hydrocarbon group or a heterocyclic group which may be substituted; and the benzene ring B represents a benzene ring which may have a substituent(s), provided that adjacent substituents in the benzene ring B may be mutually bonded to form a ring.Type: ApplicationFiled: May 20, 2009Publication date: March 24, 2011Applicant: Mitsubishi Kagaku Media Co., Ltd.Inventors: Hisashi Shoda, Kan Takeshita, Naoyuki Uchida, Takashi Miyazawa
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Publication number: 20100173114Abstract: An optical recording medium on which high-density recording and reading of optical information can be conducted by a short-wavelength light such as a blue laser beam is provided. In an optical recording medium comprising at least a substrate and a recording layer thereon that can record or read information by irradiation with light, the recording layer contains an azacyanine dye represented by general formula [I]: wherein R1 and R2 each independently represent a hydrogen atom or an optionally substituted linear or branched alkyl group having one to four carbon atoms; R3 represents a hydrogen atom or a hydrocarbon group; R4 represents a hydrogen atom or a linear or branched alkyl group having one to four carbon atoms; R5 represents an optionally substituted aromatic ring group or an optionally substituted unsaturated heterocyclic group; R4 and R5 may be combined together to form a ring; X? represents a counter anion; and the benzene ring A may be optionally substituted.Type: ApplicationFiled: December 27, 2006Publication date: July 8, 2010Applicant: Mitsubishi Kagaku Media Co., Ltd.Inventors: Yutaka Kurose, Takashi Miyazawa, Hideyuki Kubo, Naoyuki Uchida, Shigeyuki Furomoto, Kenichi Satake, Hisashi Shoda, Yasushi Aizawa, Yasufumi Dan-Oh, Masahiko Toki
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Publication number: 20100119764Abstract: To provide an optical recording medium on which recording/retrieving of high density optical information is possible by a short wavelength light such as a blue laser. An optical recording medium comprising a substrate and a recording layer capable of recording or retrieving information by irradiation with light, formed on the substrate, wherein the recording layer contains the cyanine dye represented by the following formula (I): wherein each of A1 and B1 which are independent of each other, is an aromatic ring which may have a substituent, provided that at least one aromatic ring of A1 and B1 contains a nitrogen atom; each of R1 and R2 which are independent of each other, is a substituent, provided that R1 and/or R2 may be bonded to other cation; each of X1, X2, X3 and X4 which are independent of one another, is an organic group, provided that a pair of X1 and X2, and/or a pair of X3 and X4, may be mutually bonded to form a cyclic structure; Y1 is a hydrogen atom or an organic group; and Z is an anion.Type: ApplicationFiled: February 13, 2008Publication date: May 13, 2010Applicants: Mitsubishi Kagaku Media Co., Ltd., KAB. KAISHA HAYASHIBARA SEIBUTSU KAGAKU KENKYUJOInventors: Hisashi Shoda, Naoyuki Uchida, Shigeyuki Furomoto, Yasushi Aizawa, Yasufumi Dan-OH, Masahiko Toki
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Publication number: 20100098898Abstract: The invention provides an azo metal chelate dye suitable for use in a recording layer of an optical recording medium capable of high-speed recording or an optical recording medium having plural recording layers, and an optical recording medium. The azo metal chelate dye comprises an azo dye compound represented by the general formula (1) and Zn2+: (wherein R1 represents a linear or branched alkyl group that may be substituted, or a cycloalkyl group that may be substituted; Y represents a linear or branched alkyl group substituted with at least two fluorine atoms; R2, R3, R4, R5 and R6 each independently represents a hydrogen atom or a linear or branched alkyl group that may be substituted, and R3 and R4, R4 and R5, or R5 and R6 may be bonded with each other to form a ring; and a proton is released from the compound of formula (1) to form the chelate dye together with Zn2+).Type: ApplicationFiled: September 21, 2007Publication date: April 22, 2010Applicant: MITSUBISHI KAGAKU MEDIA CO., LTDInventors: Hisashi Shoda, Naoyuki Uchida, Kenichi Satake, Yoshihiro Noda
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Publication number: 20100015382Abstract: The invention provides an azo metal chelate dye suitable for use in a recording layer of an optical recording medium capable of high-speed recording or an optical recording medium having plural recording layers, and an optical recording medium.Type: ApplicationFiled: September 27, 2007Publication date: January 21, 2010Applicant: Mitsubishi Kagaku Media Co., Ltd.Inventors: Hisashi Shoda, Naoyuki Uchida, Kenichi Satake, Yoshihiro Noda
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Patent number: 7642036Abstract: The azo-metal chelate dye to which the present invention is applied is a compound formed as follows: for example, 1,3,4-thiadiazole ring is selected as the diazo component; the diazo component is combined with a coupler component having condensed rings including a fluorine-substituted alkylsulfonylamino group and an amino group, to form an azo dye compound; and the azo dye compound forms chelate bonds with at least one metal selected from the group consisting of Co, Ni, Cu and Pd. Here, two absorption bands (OD1 and OD2) are seen in the absorption spectrum, which is measured in a range of 400 to 800 nm wavelengths. The azo-metal chelate dye is characterized in that the optical density ratio (OD2/OD1) of the two absorption bands is greater than 1.25. By using this azo-metal chelate dye, an optical recording medium capable of high-speed recording is provided.Type: GrantFiled: August 17, 2005Date of Patent: January 5, 2010Assignee: Mitsubishi Kagaku Media Co., Ltd.Inventors: Kenichi Satake, Yuko Naitou, Hisashi Shoda, Yuki Suzuki
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Publication number: 20090291246Abstract: An optical recording medium, which makes information be recorded and read with light having wavelength of 700 nm or shorter, with excellent light resistance, high-speed recording and high-density recording is provided. The optical recording medium comprises a substrate, a recording layer formed on the substrate and containing a host dye, which can make information be recorded or read by being irradiated with light having wavelength of 700 nm or shorter, and a reflective layer. The recording layer contains at least an azo metal-chelate dye additive, of which central metal ion is any one of Cu2+, Fe2+ and Co2+.Type: ApplicationFiled: August 10, 2006Publication date: November 26, 2009Inventors: Hisashi Shoda, Kenichi Satake, Yuko Naito
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Publication number: 20090263611Abstract: [Problem]: An optical recording medium having a capability of recording and/or reading high density optical information using a short wavelength laser light is provided. [Means to Address the Problem]: The optical recording medium has a capability of recording and/or reading high density optical information using a short wavelength laser light having a wavelength of 350 nm to 530 nm. The optical recording medium has a recording layer containing a metal complex compound and formed on a substrate. The metal complex compound is composed of a cyclic ?-diketone azo compound represented by the general formula (I) or general formula (II) and a divalent metal ion coordinated to the cyclic ?-diketone azo compound.Type: ApplicationFiled: July 11, 2006Publication date: October 22, 2009Applicant: Mitsubishi Kagaku Media Co., Ltd.Inventors: Takashi Miyazawa, Yutaka Kurose, Hisashi Shoda, Kenichi Satake, Yukiko Takahashi, Mayumi Kimura, Naoyuki Uchida, Hideki Tamagawa
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Publication number: 20090246687Abstract: The azo-metal chelate dye to which the present invention is applied is a compound formed as follows: for example, 1,3,4-thiadiazole ring is selected as the diazo component; the diazo component is combined with a coupler component having condensed rings including a fluorine-substituted alkylsulfonylamino group and an amino group, to form an azo dye compound; and the azo dye compound forms chelate bonds with at least one metal selected from the group consisting of Co, Ni, Cu and Pd. Here, two absorption bands (OD1 and OD2) are seen in the absorption spectrum, which is measured in a range of 400 to 800 nm wavelengths. The azo-metal chelate dye is characterized in that the optical density ratio (OD2/OD1) of the two absorption bands is greater than 1.25. By using this azo-metal chelate dye, an optical recording medium capable of high-speed recording is provided.Type: ApplicationFiled: June 10, 2009Publication date: October 1, 2009Applicant: Mitsubishi Kagaku Media Co. Ltd.Inventors: Kenichi SATAKE, Yuko NAITOU, Hisashi SHODA, Yuki SUZUKI
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Publication number: 20090234122Abstract: The present invention has an object to widen the range of applicable field of organic compounds to be selected as light absorbing materials in various fields including information recordings, solar energy generations, electric machinery apparatuses, electric communicating apparatuses, optical apparatuses, clothes, building/bedding/decorating products, sanitary and health goods, and agricultural materials, particularly, in the field of optical recording media by providing novel organic materials which absorb short-wavelength visible light, have improved lightfastness and solubility in solvents, and also have heat characteristics depending upon uses to be applied. The object is attained by providing cyanine dyes having a specific structure.Type: ApplicationFiled: May 19, 2006Publication date: September 17, 2009Inventors: Yasushi Aizawa, Michie Ito, Yasufumi Dan-Oh, Kentaro Yano, Hisashi Shoda, Kenichi Satake, Naoyuki Uchida
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Patent number: 7507524Abstract: The azo-metal chelate dye of the present invention is formed, for example, from zinc (divalent) as a center metal ion and an azo compound bonded with a coupler component having an amino group and a fluorine-substituted alkylsulfonylamino group subjected to condensed ring-formation to have a 1,3,4-thiazole ring as a diazo component.Type: GrantFiled: September 6, 2005Date of Patent: March 24, 2009Assignee: Mitsubishi Kagaku Media Co., Ltd.Inventors: Kenichi Satake, Hisashi Shoda, Naoyuki Uchida
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Publication number: 20070054219Abstract: The azo-metal chelate dye of the present invention is formed, for example, from zinc (divalent) as a center metal ion and an azo compound bonded with a coupler component having an amino group and a fluorine-substituted alkylsulfonylamino group subjected to condensed ring-formation to have a 1,3,4-thiazole ring as a diazo component.Type: ApplicationFiled: September 6, 2005Publication date: March 8, 2007Applicant: Mitsubishi Kagaku Media Co., Ltd.Inventors: Kenichi Satake, Hisashi Shoda, Naoyuki Uchida
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Publication number: 20060035171Abstract: The azo-metal chelate dye to which the present invention is applied is a compound formed as follows: for example, 1,3,4-thiadiazole ring is selected as the diazo component; the diazo component is combined with a coupler component having condensed rings including a fluorine-substituted alkylsulfonylamino group and an amino group, to form an azo dye compound; and the azo dye compound forms chelate bonds with at least one metal selected from the group consisting of Co, Ni, Cu and Pd. Here, two absorption bands (OD1 and OD2) are seen in the absorption spectrum, which is measured in a range of 400 to 800 nm wavelengths. The azo-metal chelate dye is characterized in that the optical density ratio (OD2/OD1) of the two absorption bands is greater than 1.25. By using this azo-metal chelate dye, an optical recording medium capable of high-speed recording is provided.Type: ApplicationFiled: August 17, 2005Publication date: February 16, 2006Applicants: MITSUBISHI CHEMICAL CORPORATION, Mitsubishi Kagaku Media Co. Ltd.Inventors: Kenichi Satake, Yuko Naitou, Hisashi Shoda, Yuki Suzuki
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Patent number: 6794114Abstract: The object of the present invention is to provide an optical recording medium which is excellent in the recording sensitivity and suitable for the high speed recording. Thus, the present invention is an optical recording medium comprising a substrate and a laser-writable and readable recording layer provided thereon, wherein said recording layer contains a chelate dye comprising two or more azo compounds having different structures and a divalent or more metal ion, and said azo compounds are a selected from azo compounds represented by the following general formula (I) and the general formula (II).Type: GrantFiled: December 17, 2001Date of Patent: September 21, 2004Assignee: Mitsubishi Chemical CorporationInventors: Hisashi Shoda, Rieko Hata, Satoru Imamura
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Publication number: 20030161987Abstract: It is to provide an optical recording medium suitable for information recording at a high speed.Type: ApplicationFiled: April 25, 2002Publication date: August 28, 2003Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Akira Nakajima, Yoshihiro Noda, Hisashi Shoda, Toshifumi Takisawa, Hideharu Takeshima
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Publication number: 20020051941Abstract: The object of the present invention is to provide an optical recording medium which is excellent in the recording sensitivity and suitable for the high speed recording.Type: ApplicationFiled: December 17, 2001Publication date: May 2, 2002Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Hisashi Shoda, Rieko Hata, Satoru Imamura