Patents by Inventor Mitsutoshi Anzai
Mitsutoshi Anzai 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: 7902402Abstract: The present invention provides a method for producing a tetramine compound represented by formula (1): wherein R1, R2 and R3, which may be the same or different, each represents a hydrogen atom, a tertiary alkyl group having 4 to 8 carbon atoms, an unsubstituted aryl group or an aryl group substituted with a tertiary alkyl group having 4 to 8 carbon atoms, and n represents 3 or 4.Type: GrantFiled: January 15, 2010Date of Patent: March 8, 2011Assignee: Hodogaya Chemical Co., Ltd.Inventors: Shigeru Kusano, Makoto Koike, Atsushi Takesue, Mitsutoshi Anzai
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Patent number: 7897816Abstract: The present invention provides a tetramine compound represented by the following general formula (1): wherein R1, R2 and R3, which may be the same or different, each represents a hydrogen atom, a tertiary alkyl group having 4 to 8 carbon atoms, an unsubstituted aryl group or an aryl group substituted with a tertiary alkyl group having 4 to 8 carbon atoms, and n represents 3 or 4.Type: GrantFiled: January 15, 2010Date of Patent: March 1, 2011Assignee: Hodogaya Chemical Co., Ltd.Inventors: Shigeru Kusano, Makoto Koike, Atsushi Takesue, Mitsutoshi Anzai
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Patent number: 7807274Abstract: The present invention provides a tetramine compound represented by the following general formula (1): wherein R1, R2 and R3, which may be the same or different, each represents a hydrogen atom, a tertiary alkyl group having 4 to 8 carbon atoms, an unsubstituted aryl group or an aryl group substituted with a tertiary alkyl group having 4 to 8 carbon atoms, and n represents 3 or 4. According to the invention, there can be provided a material suitable as a material for an organic EL element requiring luminous stability at the time of high temperature driving which has been the largest problem of the conventional organic EL element. Further, an organic EL element containing the above-mentioned tetramine compound and a method for producing the above-mentioned tetramine compound are also disclosed.Type: GrantFiled: December 24, 2004Date of Patent: October 5, 2010Assignee: Hodogaya Chemical Co., Ltd.Inventors: Shigeru Kusano, Makoto Koike, Atsushi Takesue, Mitsutoshi Anzai
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Patent number: 7799492Abstract: The present invention provides p-terphenyl compounds represented by the following general formula (1) and (2): and an electrophotographic photoconductor containing the compound. According to the invention, a charge transporting agent having improved solubility in an organic solvent and an electrophotographic photoconductor excellent in drift mobility and having high sensitivity and high durability are provided.Type: GrantFiled: May 24, 2005Date of Patent: September 21, 2010Assignee: Hodogaya Chemical Co., Ltd.Inventors: Katsumi Abe, Atsushi Takesue, Shinya Nagai, Mitsutoshi Anzai
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Patent number: 7759030Abstract: The present invention provides p-terphenyl compounds represented by the following general formula (1) and (2): and an electrophotographic photoconductor containing the compound. According to the invention, a charge transporting agent having improved solubility in an organic solvent and an electrophotographic photoconductor excellent in drift mobility and having high sensitivity and high durability are provided.Type: GrantFiled: September 29, 2009Date of Patent: July 20, 2010Assignee: Hodogaya Chemical Co., Ltd.Inventors: Katsumi Abe, Atsushi Takesue, Shinya Nagai, Mitsutoshi Anzai
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Publication number: 20100174115Abstract: The present invention provides a method for producing a tetramine compound represented by formula (1): wherein R1, R2 and R3, which may be the same or different, each represents a hydrogen atom, a tertiary alkyl group having 4 to 8 carbon atoms, an unsubstituted aryl group or an aryl group substituted with a tertiary alkyl group having 4 to 8 carbon atoms, and n represents 3 or 4.Type: ApplicationFiled: January 15, 2010Publication date: July 8, 2010Applicant: Hodogaya Chemical Co., Ltd.Inventors: Shigeru Kusano, Makoto Koike, Atsushi Takesue, Mitsutoshi Anzai
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Publication number: 20100171080Abstract: The present invention provides a tetramine compound represented by the following general formula (1): wherein R1, R2 and R3, which may be the same or different, each represents a hydrogen atom, a tertiary alkyl group having 4 to 8 carbon atoms, an unsubstituted aryl group or an aryl group substituted with a tertiary alkyl group having 4 to 8 carbon atoms, and n represents 3 or 4.Type: ApplicationFiled: January 15, 2010Publication date: July 8, 2010Applicant: Hodogaya Chemical Co., Ltd.Inventors: Shigeru KUSANO, Makoto Koike, Atsushi Takesue, Mitsutoshi Anzai
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Publication number: 20100015542Abstract: The present invention provides p-terphenyl compounds represented by the following general formula (1) and (2): and an electrophotographic photoconductor containing the compound. According to the invention, a charge transporting agent having improved solubility in an organic solvent and an electrophotographic photoconductor excellent in drift mobility and having high sensitivity and high durability are provided.Type: ApplicationFiled: September 29, 2009Publication date: January 21, 2010Applicant: Hodogaya Chemical Co., Ltd.Inventors: Katsumi Abe, Atsushi Takesue, Shinya Nagai, Mitsutoshi Anzai
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Patent number: 7402701Abstract: An organic electroluminescent device comprising a light-emitting layer between a pair of electrodes, the light-emitting layer comprising a mixture of a hole-transporting material consisting of a tertiary amine compound, an electron-transporting material and a light-emitting additive material, in which the tertiary amine compound has two or more oxidation potentials determined by a cyclic voltammetry wherein a potential difference between the first oxidation potential and the second oxidation potential in the oxidation potentials is 0.22V or more, and a glass transition temperature of at least 100° C., and the electron-transporting material has a glass transition temperature of at least 100° C.Type: GrantFiled: July 31, 2007Date of Patent: July 22, 2008Assignees: DENSO CORPORATION, Hodogaya Chemical Co., Ltd.Inventors: Tetsuya Kato, Kazushige Kojima, Shigeru Kusano, Makoto Koike, Atsushi Takesue, Mitsutoshi Anzai
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Publication number: 20080076050Abstract: The present invention provides p-terphenyl compounds represented by the following general formula (1) and (2): and an electrophotographic photoconductor containing the compound. According to the invention, a charge transporting agent having improved solubility in an organic solvent and an electrophotographic photoconductor excellent in drift mobility and having high sensitivity and high durability are provided.Type: ApplicationFiled: May 24, 2005Publication date: March 27, 2008Applicant: Hodogaya Chemical Co., Ltd.Inventors: Katsumi Abe, Atsushi Takesue, Shinya Nagai, Mitsutoshi Anzai
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Publication number: 20070293704Abstract: An organic electroluminescent device comprising a light-emitting layer between a pair of electrodes, the light-emitting layer comprising a mixture of a hole-transporting material consisting of a tertiary amine compound, an electron-transporting material and a light-emitting additive material, in which the tertiary amine compound has two or more oxidation potentials determined by a cyclic voltammetry wherein a potential difference between the first oxidation potential and the second oxidation potential in the oxidation potentials is 0.22V or more, and a glass transition temperature of at least 100° C., and the electron-transporting material has a glass transition temperature of at least 100° C.Type: ApplicationFiled: July 31, 2007Publication date: December 20, 2007Applicants: DENSO CORPORATION, HODOGAYA CHEMICAL CO., LTD.Inventors: Tetsuya Kato, Kazushige Kojima, Shigeru Kusano, Makoto Koike, Atsushi Takesue, Mitsutoshi Anzai
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Publication number: 20070149816Abstract: The present invention provides a tetramine compound represented by the following general formula (1): wherein R1, R2 and R3, which may be the same or different, each represents a hydrogen atom, a tertiary alkyl group having 4 to 8 carbon atoms, an unsubstituted aryl group or an aryl group substituted with a tertiary alkyl group having 4 to 8 carbon atoms, and n represents 3 or 4. According to the invention, there can be provided a material suitable as a material for an organic EL element requiring luminous stability at the time of high temperature driving which has been the largest problem of the conventional organic EL element. Further, an organic EL element containing the above-mentioned tetramine compound and a method for producing the above-mentioned tetramine compound are also disclosed.Type: ApplicationFiled: December 24, 2004Publication date: June 28, 2007Inventors: Shigeru Kusano, Makoto Koike, Atsushi Takesue, Mitsutoshi Anzai
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Charge controlling agent, method for producing the same and toner for developing electrostatic image
Patent number: 6897000Abstract: A method for producing a charge controlling agent comprisinig a reaction product of an aromatic hydroxycarboxylic acid and a calcium compound bonded by at least one bondinig system selected from the group consisting of coordinate bonding, covalent bonding and ionic bonding, characterized in that the aromatic hydroxycarboxylic acid and the calcium compound are reacted by dropwise adding a solution of the aromatic hydroxycarboxylic acid to a solution of the calcium compound as a metal-imparting agent, a charge controlling agent produced by said method, which has a shape coefficient (SF-1) average value of at most 250 and a shape coefficient (SF-2) average value of at most 200, and an electrostatic image developing toner containing said charge controlling agent having a presence ratio on a toner surface of at least 2.0 mg/1 g of toner.Type: GrantFiled: November 6, 2001Date of Patent: May 24, 2005Assignee: Hodogaya Chemical Co., Ltd.Inventors: Shinji Otani, Noriyuki Suzuki, Hideyuki Otsuka, Mitsutoshi Anzai -
Patent number: 6790574Abstract: An electrophotographic photoreceptor having a photosensitive layer containing, as a charge transporting material, at least one indane compound of the formula (1), and at least one polycarbonate resin of the formula (4) and/or an organic additive containing at least one atom selected from the group consisting of nitrogen, oxygen, phosphorus and sulfur for an electrophotographic photoreceptor.Type: GrantFiled: September 26, 2002Date of Patent: September 14, 2004Assignee: Hodogaya Chemical Co., Ltd.Inventors: Katsumi Abe, Chieko Inayoshi, Masaki Ohkubo, Mitsutoshi Anzai, Yasuo Murakami
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Publication number: 20030203298Abstract: An electrophotographic photoreceptor having a photosensitive layer containing, as a charge transporting material, at least one indane compound of the formula (1), 1Type: ApplicationFiled: September 26, 2002Publication date: October 30, 2003Applicant: Hodogaya Chemical Co., Ltd.Inventors: Katsumi Abe, Chieko Inayoshi, Masaki Ohkubo, Mitsutoshi Anzai, Yasuo Murakami
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Publication number: 20030162111Abstract: A method for producing a charge controlling agent comprisinig a reaction product of an aromatic hydroxycarboxylic acid and a calcium compound bonded by at least one bondinig system selected from the group consisting of coordinate bonding, covalent bonding and ionic bonding, characterized in that the aromatic hydroxycarboxylic acid and the calcium compound are reacted by dropwise adding a solution of the aromatic hydroxycarboxylic acid to a solution of the calcium compound as a metal-imparting agent, a charge controlling agent produced by said method, which has a shape coefficient (SF-1) average value of at most 250 and a shape coefficient (SF-2) average value of at most 200, and an electrostatic image developing toner containing said charge controlling agent having a presence ratio on a toner surface of at least 2.0 mg/1 g of toner.Type: ApplicationFiled: November 29, 2002Publication date: August 28, 2003Inventors: Shinji Otani, Noriyuki Suzuki, Hideyuki Otsuka, Mitsutoshi Anzai
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Patent number: 6316577Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a structural unit of formula (I), two structural units of formulae (I) and (II), or a repeat unit of formula (III): wherein Ar1 to Ar7, Y, X, and n are as specified in the specification.Type: GrantFiled: January 10, 2000Date of Patent: November 13, 2001Assignee: Hodogaya Chemical Co., Ltd.Inventors: Tomoyuki Shimada, Masaomi Sasaki, Masafumi Ohta, Akihiro Imai, Mitsutoshi Anzai, Tamotsu Aruga, Kazukiyo Nagai, Katsuhiro Morooka
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Patent number: 6191249Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III): wherein Ar1 to Ar3, X, n, k and j are as specified in the specification.Type: GrantFiled: January 13, 1999Date of Patent: February 20, 2001Assignee: Ricoh Company, Ltd.Inventors: Chiaki Tanaka, Nozomu Tamoto, Masaomi Sasaki, Kazukiyo Nagai, Tomoyuki Shimada, Chihaya Adachi, Akira Katayama, Mitsutoshi Anzai, Katsuhiro Morooka
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Patent number: 6069224Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a repeat unit of formula (I), or two repeat units of formulae (II) and (III): ##STR1## wherein Ar.sup.1 to Ar.sup.6, X, n, k and j are as specified in the specification.Type: GrantFiled: January 21, 1998Date of Patent: May 30, 2000Assignees: Ricoh Company, Ltd., Hodogaya Chemical Co., Ltd.Inventors: Chihaya Adachi, Masaomi Sasaki, Kazukiyo Nagai, Tomoyuki Shimada, Chiaki Tanaka, Nozomu Tamoto, Akira Katayama, Mitsutoshi Anzai, Akihiro Imai, Katsuhiro Morooka
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Patent number: 6027846Abstract: An electrophotographic photoconductor includes an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a structural unit of formula (I), two structural units of formulae (I) and (II), or a repeat unit of formula (III): ##STR1## wherein Ar.sup.1 to Ar.sup.7, Y, X, and n are as specified in the specification.Type: GrantFiled: June 28, 1996Date of Patent: February 22, 2000Assignees: Ricoh Company, Ltd., Hodogaya Chemical Co., Ltd.Inventors: Tomoyuki Shimada, Masaomi Sasaki, Masafumi Ohta, Akihiro Imai, Mitsutoshi Anzai, Tamotsu Aruga, Kazukiyo Nagai, Katsuhiro Morooka