Patents by Inventor Naohiro Tarumoto
Naohiro Tarumoto 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: 8624065Abstract: A method for producing an oxidized cyclic phenol sulfide which comprises the step of oxidizing a cyclic phenol sulfide of the following formula (1) as a raw material: wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 8, in a solvent(s) other than a halogenated hydrocarbon in an amount of 2 or more and less than 10 parts by weight per 1 part by weight of the cyclic phenol sulfide, with an oxidizing agent(s) to obtain an oxidized cyclic phenol sulfide of the following formula (2): wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 8, and n is 1 or 2.Type: GrantFiled: June 14, 2012Date of Patent: January 7, 2014Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Publication number: 20130309926Abstract: In dispersing a fine carbon fiber in a thermosetting resin, the invention disperses and disentangles the fine carbon fiber being aggregates form in the thermosetting resin solution, maintains the stable dispersed state, lowers the viscosity of the thermosetting resin solution in which the fine carbon fiber is dispersed, and provides a thermosetting resin formed article containing the fine carbon fiber by curing the fine carbon fiber dispersion solution and a production method thereof. The thermosetting resin-containing solution in which a fine carbon fiber is dispersed, comprises a thermosetting resin, the fine carbon fiber and a viscosity-decreasing agent for fine carbon fiber having a chemical structure represented by the following general formula (1), wherein R1 to R7 are hydrogen atoms or the like, R5 and R6 may be bonded together to form a ring, and all of them have not more than 30 carbon atoms.Type: ApplicationFiled: January 11, 2012Publication date: November 21, 2013Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Naohiro Tarumoto, Takayuki Tsukada, Tatsumi Uragami
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Publication number: 20120253054Abstract: A method for producing an oxidized cyclic phenol sulfide which comprises the step of oxidizing a cyclic phenol sulfide of the following formula (1) as a raw material: wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 8, in a solvent(s) other than a halogenated hydrocarbon in an amount of 2 or more and less than 10 parts by weight per 1 part by weight of the cyclic phenol sulfide, with an oxidizing agent(s) to obtain an oxidized cyclic phenol sulfide of the following formula (2): wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 8, and n is 1 or 2.Type: ApplicationFiled: June 14, 2012Publication date: October 4, 2012Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Patent number: 8263786Abstract: The object of the present invention is, in methods for producing cyclic phenol sulfides, to provide methods for producing a number of more macrocyclic products, which comprise the steps of producing a mixture of cyclic phenol sulfides from an inexpensive raw material in one step without inducing the reduction in yield of a cyclic quatromer; and easily separating and purifying a single component from the mixture of cyclic phenol sulfides. The present invention discloses methods for producing a cyclic phenol sulfide which comprises the step of reacting a phenol compound as a raw material, in a one-step reaction, with 1.7 to 2.5 molar equivalent of sulfur and 0.25 to 0.75 molar equivalent of an alkali metal reagent per 1 mol of the phenol compound to obtain a mixture of cyclic phenol sulfide wherein m=4 and at least one kind(s) of cyclic phenol sulfide wherein m=5 to 9, or each separate cyclic phenol sulfide comprised in the mixture.Type: GrantFiled: August 29, 2007Date of Patent: September 11, 2012Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Patent number: 8232429Abstract: A method for producing an oxidized cyclic phenol sulfide which comprises the step of oxidizing a cyclic phenol sulfide of the following formula (1) as a raw material: wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 8, in a solvent(s) other than a halogenated hydrocarbon in an amount of 2 or more and less than 10 parts by weight per 1 part by weight of the cyclic phenol sulfide, with an oxidizing agent(s) to obtain an oxidized cyclic phenol sulfide of the following formula (2): wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 8, and n is 1 or 2.Type: GrantFiled: July 16, 2009Date of Patent: July 31, 2012Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Publication number: 20110198543Abstract: Upon dispersing fine carbon fibers into water, by using an anionic surfactant having a high electrostatic repulsion effect, an nonionic surfactant having a high stereoscopic repulsion effect, and an anionic surfactant having high electrostatic and stereoscopic repulsion effects, in combination, an aqueous dispersion of fine carbon fibers which shows a high dispersibility without causing significant cohesion of mutual fine carbon fibers, and maintains a mean particle diameter (d50) of not more than 350 nm in a wide concentration range from a relatively low concentration to a relatively high concentration is provided.Type: ApplicationFiled: October 9, 2009Publication date: August 18, 2011Applicant: HODOGAYA CHEMICAL CO., LTD.,Inventors: Naohiro Tarumoto, Tomoko Tamura, Takayuki Tsukada
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Publication number: 20110115368Abstract: The present invention provides an arylamine compound having a molecular weight of from 1500 to 6000 represented by the general formula (1): According to the present invention, there can be provided an arylamine compound having excellent hole injection and transporting characteristics and being capable of forming a stable thin film. By using the compound, emission efficiency and durability of conventional organic EL devices can remarkably be improved.Type: ApplicationFiled: November 18, 2010Publication date: May 19, 2011Applicant: Hodogaya Chemical Co., Ltd.Inventors: Tetsuzo MIKI, Naohiro Tarumoto, Yoshio Taniguchi, Musubu Ichikawa
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Patent number: 7901858Abstract: The present invention discloses a mixed cyclic phenol sulfide which is a mixture of the cyclic phenol sulfide wherein m is 8 and the cyclic phenol sulfide wherein m is an integer other than 8, the cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 9; or a cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in the environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: GrantFiled: September 29, 2008Date of Patent: March 8, 2011Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20110036829Abstract: [Problems] To produce planar heating elements having high exothermic efficiency and provide energy-saving electric carpets, floor heating, wall surface heating appliances and heaters for thawing on roads and/or roofs or antifogging for mirrors. [Means for Solving] To provide a planar heating element produced by applying, to an insulating substrate or the like, an electrically conductive fine carbon fiber film that is fabricated using an aqueous dispersion of fine carbon fibers in which the fine carbon fibers are evenly dispersed in an aqueous solution.Type: ApplicationFiled: December 25, 2008Publication date: February 17, 2011Applicants: HODOGAYA CHEMICAL CO., LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Bunshi Fugetsu, Naohiro Tarumoto, Yasuhito Yano, Jun Suzuki, Takayuki Tsukada, Fuminori Munekane
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Patent number: 7862905Abstract: The present invention provides an arylamine compound having a molecular weight of from 1500 to 6000 represented by the general formula (1): According to the present invention, there can be provided an arylamine compound having excellent hole injection and transporting characteristics and being capable of forming a stable thin film. By using the compound, emission efficiency and durability of conventional organic EL devices can remarkably be improved.Type: GrantFiled: March 25, 2005Date of Patent: January 4, 2011Assignee: Hodogaya Chemical Co., Ltd.Inventors: Tetsuzo Miki, Naohiro Tarumoto, Yoshio Taniguchi, Musubu Ichikawa
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Patent number: 7820832Abstract: The present invention discloses an oxidized mixed cyclic phenol sulfide which is a mixture of the oxidized cyclic phenol sulfide wherein m is 8 and the oxidized cyclic phenol sulfide wherein m is an integer other than 8, the oxidized cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 9, and n is 1 or 2; or an oxidized cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: GrantFiled: June 9, 2009Date of Patent: October 26, 2010Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Patent number: 7709172Abstract: The present invention discloses an oxidized mixed cyclic phenol sulfide which is a mixture of the oxidized cyclic phenol sulfide wherein m is 8 and the oxidized cyclic phenol sulfide wherein m is an integer other than 8, the oxidized cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 9, and n is 1 or 2; or an oxidized cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: GrantFiled: October 10, 2008Date of Patent: May 4, 2010Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20090275783Abstract: A method for producing an oxidized cyclic phenol sulfide which comprises the step of oxidizing a cyclic phenol sulfide of the following formula (1) as a raw material: wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 8, in a solvent(s) other than a halogenated hydrocarbon in an amount of 2 or more and less than 10 parts by weight per 1 part by weight of the cyclic phenol sulfide, with an oxidizing agent(s) to obtain an oxidized cyclic phenol sulfide of the following formula (2): wherein R represents a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 8, and n is 1 or 2.Type: ApplicationFiled: July 16, 2009Publication date: November 5, 2009Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Publication number: 20090264661Abstract: The object of the present invention is, in methods for producing cyclic phenol sulfides, to provide methods for producing a number of more macrocyclic products, which comprise the steps of producing a mixture of cyclic phenol sulfides from an inexpensive raw material in one step without inducing the reduction in yield of a cyclic quatromer; and easily separating and purifying a single component from the mixture of cyclic phenol sulfides. The present invention discloses methods for producing a cyclic phenol sulfide which comprises the step of reacting a phenol compound as a raw material, in a one-step reaction, with 1.7 to 2.5 molar equivalent of sulfur and 0.25 to 0.75 molar equivalent of an alkali metal reagent per 1 mol of the phenol compound to obtain a mixture of cyclic phenol sulfide wherein m=4 and at least one kind(s) of cyclic phenol sulfide wherein m=5 to 9, or each separate cyclic phenol sulfide comprised in the mixture.Type: ApplicationFiled: August 29, 2007Publication date: October 22, 2009Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masateru Yasumura, Yoshikazu Aoki, Masami Ito, Masafumi Umekawa, Naohiro Tarumoto
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Publication number: 20090239169Abstract: The present invention discloses an oxidized mixed cyclic phenol sulfide which is a mixture of the oxidized cyclic phenol sulfide wherein m is 8 and the oxidized cyclic phenol sulfide wherein m is an integer other than 8, the oxidized cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 9, and n is 1 or 2; or an oxidized cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: ApplicationFiled: June 9, 2009Publication date: September 24, 2009Applicant: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20090042120Abstract: The present invention discloses an oxidized mixed cyclic phenol sulfide which is a mixture of the oxidized cyclic phenol sulfide wherein in is 8 and the oxidized cyclic phenol sulfide wherein m is an integer other than 8, the oxidized cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, m is an integer from 4 to 9, and n is 1 or 2; or an oxidized cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: ApplicationFiled: October 10, 2008Publication date: February 12, 2009Applicant: Hodogaya Chemical Co., Ltd.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20090035678Abstract: The present invention discloses a mixed cyclic phenol sulfide which is a mixture of the cyclic phenol sulfide wherein m is 8 and the cyclic phenol sulfide wherein m is an integer other than 8, the cyclic phenol sulfide being represented by the following formula (1): wherein R is a straight or branched alkyl group having 1 to 6 carbon atoms, and m is an integer from 4 to 9; or a cyclic phenol sulfide of formula (1) wherein m is 8. The present invention also discloses a charge control agent which comprises the above sulfide(s) as the active ingredient; and a toner which comprises the charge control agent, a coloring agent and a binder resin. This charge control agent is particularly useful for color toners, and it speeds up charging risetime, and has a high charge amount and charging characteristics excellent in the environmental stability. Further, the charge control agent is safe since it does not have any problem with the waste regulations.Type: ApplicationFiled: September 29, 2008Publication date: February 5, 2009Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa, Masaki Okubo, Hideyuki Otsuka, Jun Watanabe
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Publication number: 20070285004Abstract: The present invention provides an arylamine compound having a molecular weight of from 1500 to 6000 represented by the general formula (1): According to the present invention, there can be provided an arylamine compound having excellent hole injection and transporting characteristics and being capable of forming a stable thin film. By using the compound, emission efficiency and durability of conventional organic EL devices can remarkably be improved.Type: ApplicationFiled: March 25, 2005Publication date: December 13, 2007Applicants: Hodogaya Chemical Co., Ltd, Shinshu UniversityInventors: Tetsuzo Miki, Naohiro Tarumoto, Yoshio Taniguchi, Musubu Ichikawa