Patents by Inventor Tomio Yoneyama
Tomio Yoneyama 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: 20090275742Abstract: It is to provide a dye for an anisotropic dye film to be formed by a wet system film-forming method, which is achromatic and has high dichroism and a high degree of molecular orientation, an anisotropic dye film containing the dye and a polarizing element employing the film. A dye for an anisotropic dye film to be formed by a wet system film-forming method, of which the free acid form is represented by the following formula (I), a composition for an anisotropic dye film containing the dye, an anisotropic dye film and a polarizing element employing the anisotropic dye film: wherein A11: a (substituted) phenyl group, a (substituted) naphthyl group or a (substituted) aromatic heterocyclic group; B11: a bivalent aromatic hydrocarbon group or aromatic hydrocyclic group; R11, R22: H, OH, a (substituted) alkyl group, a (substituted) phenyl group or a (substituted) acyl group; n?: 1 or 2; m: 0 or 1.Type: ApplicationFiled: April 4, 2006Publication date: November 5, 2009Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Hideo Sano, Tomio Yoneyama, Masaaki Nishimura, Wataru Shimizu, Ryuichi Hasegawa, Masami Kadowaki, Junichi Oizumi
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Patent number: 7527862Abstract: An anisotropic dye film having high dichromatic properties is provided. An anisotropic dye film wherein the period d attributable to molecular stacking is at most 3.445 ?, and the column length L thereof is at least 105 ?. The anisotropic dye film preferably has a degree of orientation of the molecular stacking axes of at least 85% and a film thickness of at most 30 ?m, and is formed by a wet film-forming method. Since it has a molecular alignment suitable to develop a dichroic ratio, it provides high dichromatic properties. A polarizing element having this anisotropic dye film is excellent in heat resistance, light fastness and polarizing performance.Type: GrantFiled: April 14, 2006Date of Patent: May 5, 2009Assignee: Mitsubishi Chemical CorporationInventors: Tomio Yoneyama, Ryuichi Hasegawa, Hideo Sano, Junichi Oizumi, Masaaki Nishimura, Masami Kadowaki
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Publication number: 20090040609Abstract: The present invention provides an anisotropic dye film having a high dichroic ratio. For this reason, the present invention uses a composition for an anisotropic dye film containing an electron-deficient discotic compound and an electron-rich compound.Type: ApplicationFiled: April 21, 2006Publication date: February 12, 2009Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Ryuichi Hasegawa, Masaaki Nishimura, Tomio Yoneyama, Hideo Sano, Wataru Shimizu, Masami Kadowaki, Kiyoshi Sugiyama
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Publication number: 20080252824Abstract: An in-cell polarizer is provided which can achieve a liquid crystal device having excellent drive and display characteristics in an active drive system. A composition for the in-cell polarizer comprises a dye and a solvent and has an electric conductivity of 25 mS/cm or less.Type: ApplicationFiled: March 24, 2006Publication date: October 16, 2008Applicant: Mitsubishi Chemical CorporationInventors: Masami Kadowaki, Tomio Yoneyama
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Publication number: 20070287830Abstract: To provide a dye for an anisotropic dye film to be formed by a wet system film-forming method, which is black and which has a high degree of polarization and a high degree of molecular orientation an anisotropic dye film using the dye, and the like. A trisazo dye for an anisotropic dye film to be formed by a wet system film-forming method, of which the free acid form is represented by the following formula (1), a dye composition for an anisotropic dye film containing the dye, an anisotropic dye film, and a polarizing element using the anisotropic dye film: wherein A1 is a phenyl group or aromatic heterocyclic group which may have a substituent, B1 is an aromatic hydrocarbon group which may have a substituent, D1 is an aromatic hydrocarbon group or aromatic heterocyclic group which may have a substituent, R1 is a hydrogen atom, a hydroxyl group or an amino group which may have a substituent, and each of m and n is 0 or 1.Type: ApplicationFiled: December 27, 2005Publication date: December 13, 2007Applicant: Mitsubishi Chemical CorporationInventors: Hideo Sano, Masami Kadowaki, Ryuichi Hasegawa, Tomio Yoneyama
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Publication number: 20060230551Abstract: To provide a dye composition for an anisotropic dye film, capable of forming an anisotropic dye film which has good heat resistance, has little defects and shows high dichroism; an anisotropic dye film formed by using such a composition for an anisotropic dye film; and a polarizing element employing such an anisotropic dye film.Type: ApplicationFiled: June 19, 2006Publication date: October 19, 2006Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Ryuichi Hasegawa, Junichi Oizumi, Masami Kadowaki, Tomio Yoneyama, Hideo Sano
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Publication number: 20060182902Abstract: An anisotropic dye film having high dichromatic properties is provided. An anisotropic dye film wherein the period d attributable to molecular stacking is at most 3.445 ?, and the column length L thereof is at least 105 ?. The anisotropic dye film preferably has a degree of orientation of the molecular stacking axes of at least 85% and a film thickness of at most 30 ?m, and is formed by a wet film-forming method. Since it has a molecular alignment suitable to develop a dichroic ratio, it provides high dichromatic properties. A polarizing element having this anisotropic dye film is excellent in heat resistance, light fastness and polarizing performance.Type: ApplicationFiled: April 14, 2006Publication date: August 17, 2006Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Tomio Yoneyama, Ryuichi Hasegawa, Hideo Sano, Junichi Oizumi, Masaaki Nishimura, Masami Kadowaki
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Patent number: 6755903Abstract: A metal chelated dyestuff for inkjet recording is described, which is a water soluble azo metal chelated compound formed from an azo compound represented by the following general formula (1) and a metal element and is good at the clearness of color tone, light resistance, indoor discoloring and fading property, solubility, storage stability, and the like.Type: GrantFiled: June 24, 2002Date of Patent: June 29, 2004Assignee: Mitsubishi Chemical CorporationInventors: Masahiro Yamada, Tomio Yoneyama, Tomohiro Chino
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Publication number: 20030088077Abstract: The present invention provides a dyestuff good at the clearness of color tone, light resistance, indoor discoloring and fading property, solubility, storage stability, and the like, when the dyestuff is used as a water soluble dyestuff for inkjet recording.Type: ApplicationFiled: June 24, 2002Publication date: May 8, 2003Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Masahiro Yamada, Tomio Yoneyama, Tomohiro Chino
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Patent number: 5876627Abstract: A dichroic azo dye represented by general formula ?I! ##STR1## wherein D.sup.1 and D.sup.2 each represents an optionally substituted phenyl group or an aromatic heterocyclic group; W represents a connecting group comprising a linear polycyclic aromatic group; X represents a group selected from the group consisting of --OCH.sub.2 --, --CH.sub.2 0--, --OOC--, --COO--, --CH.sub.2 NR--, and --NRCH.sub.2 --, where R represents a hydrogen atom or a methyl group; Z.sup.1 to Z.sup.12 each represents a hydrogen atom, a halogen atom, a methyl group, or a methoxy group, or Z.sup.2 and Z.sup.3, Z.sup.5 and Z.sup.6, Z.sup.8 and Z.sup.9, and Z.sup.11 and Z.sup.12 are bonded to each other to form an aliphatic ring, an aromatic ring, or a nitrogen-containing aromatic ring; and m and n each represents a number of 0 to 2. A liquid-crystal composition containing the above dye and a liquid-crystal element employing the composition are also disclosed.Type: GrantFiled: November 27, 1996Date of Patent: March 2, 1999Assignee: Mitsubishi Chemical CorporationInventors: Masaharu Kaneko, Tomio Yoneyama
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Patent number: 5789556Abstract: A dichroic azo dye characterized by having a trifluoromethyl-substituted biphenyl framework and being represented by the following general formula, and a guest-host liquid-crystal composition and a liquid-crystal display element each containing the same and having a high order parameter throughout the whole light absorption wavelength range, are provided: ##STR1## (wherein A and B each independently represents an optionally substituted alkyl group, phenyl group or cyclohexyl group; X and X.sup.1 each independently represents a methylene group or a carbonyl group; and R.sub.1 to R.sub.12 each independently represents a hydrogen atom, a halogen atom, a methyl group or a methoxy group, or R.sub.2 and R.sub.3, R.sub.5 and R.sub.6, R.sub.8 and R.sub.9, and R.sub.11 and R.sub.12 may be bonded to each other to form an aliphatic, aromatic or nitrogenous aromatic ring which is a five-membered or larger-membered ring).Type: GrantFiled: April 18, 1997Date of Patent: August 4, 1998Assignee: Mitsubishi Chemical CorporationInventors: Masaharu Kaneko, Tomio Yoneyama, Masami Kadowaki
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Patent number: 5478384Abstract: A recording liquid excellent in print quality, light resistance, and water resistance which is characterized in that it contains an aqueous medium and at least one dye selected from the dyes represented by general formulae [I] to [V]: ##STR1## (wherein R.sub.1 and R.sub.2 each represents H, CH.sub.3, or OCH.sub.3 ; R.sub.3 represents H, Cl,CH.sub.3, or OCH.sub.3 ; R.sub.4 represents an alkyl group having 1 to 6 carbon atoms, a phenyl group, a tolyl group, or an anisyl group; R.sub.5 represents H, a phenyl group which may be substituted with a COOM group, or an alkyl group having 1 to 3 carbon atoms which is substituted with a COOM group; R.sub.6 represents H or an alkyl group having 1 to 3 carbon atoms which is substituted with a COOM group; X represents SO.sub.3 M or COOM; Y represents --CO-- or --SO.sub.Type: GrantFiled: May 5, 1994Date of Patent: December 26, 1995Assignee: Mitsubishi Kasei CorporationInventors: Hiroshi Takimoto, Tomio Yoneyama, Hideo Sano, Yukichi Murata, Masahiro Yamada
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Patent number: 5437716Abstract: A recording liquid comprising an aqueous medium and at least one dye selected from dyes, free acid forms of which are represented by formulae (I) and (II): ##STR1## The symbols in formulae (I) and (II) are defined in the specification.Type: GrantFiled: May 13, 1994Date of Patent: August 1, 1995Assignee: Mitsubishi Kasei CorporationInventors: Hideo Sano, Tomio Yoneyama, Yukichi Murata, Masahiro Yamada
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Patent number: 5125968Abstract: A recording liquid for ink jet recording, which comprises an aqueous medium, a pigment and, as a dispersant, at least one member selected from the group consisting of compounds of the following formula (I) to (X): ##STR1## wherein R.sup.1 is a C.sub.8-20 alkyl group, m is an integer of from 1 to 3, and M is Na or NH.sub.4, ##STR2## wherein R.sup.2 is a C.sub.8-20 alkyl group, n is an integer of from 1 to 3, and M is Na or NH.sub.4, ##STR3## wherein each of R.sup.3 and R.sup.4 is a C.sub.6-16 alkyl or alkenyl group, and M is Na or NH.sub.4, ##STR4## wherein R.sup.5 is a C.sub.10-20 alkyl or alkenyl group, and M is Na or NH.sub.4, ##STR5## wherein R.sup.6 is a C.sub.6-16 alkyl or alkenyl group, and M is Na or NH.sub.4, ##STR6## wherein R.sup.7 is a C.sub.10-20 alkyl or alkenyl group, and M is Na or NH.sub.4, ##STR7## wherein R.sup.8 is a C.sub.10-20 alkyl or alkenyl group, R.sup.9 is a C.sub.1-4 alkyl group and R.sup.10 is a C.sub.1-3 alkylene group, and M is Na or NH.sub.4, ##STR8## wherein R.sup.11 is a C.Type: GrantFiled: March 20, 1991Date of Patent: June 30, 1992Assignee: Mitsubishi Kasei CorporationInventors: Hiroshi Takimoto, Akira Kajikawa, Tomio Yoneyama
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Patent number: 5102731Abstract: A recording medium comprising a non-porous substrate and a coating layer formed thereon, said coating layer comprising a carboxyl group-containing ionomer-type hydrophilic urethane resin and organic and/or inorganic fine particles.Type: GrantFiled: April 25, 1989Date of Patent: April 7, 1992Assignee: Mitsubishi Kasei CorporationInventors: Hiroshi Takimoto, Tomio Yoneyama, Hideo Sano, Minoru Masuda
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Patent number: 5049188Abstract: A recording liquid comprising from 0.2 to 12% by weight, based on the total weight of the recording liquid, of a water-soluble dyestuff, from 0.5 to 25% by weight, based on the total weight of the recording liquid, of at least one member selected from the group consisting of compounds of the following formulas I, II and III, and an aqueous medium: ##STR1## wherein l is a number of from 4 to 20, ##STR2## wherein R is a lower alkyl group or a phenyl group, and each of m and n is a number of from 4 to 20, and ##STR3## wherein X is a halogen atom, and p is a number of from 4 to 20.Type: GrantFiled: May 6, 1988Date of Patent: September 17, 1991Assignee: Mitsubishi Kasei CorporationInventors: Hiroshi Takimoto, Tomio Yoneyama, Hideo Sano
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Patent number: 5026505Abstract: A guest-host type liquid crystal composition comprising one or more host liquid crystals and dissolved therein one or more pleochroic dyes having a trans-4-substituted cyclohexyl group, preferably in an amount of 70% by mole or more of said trans-4-substituted cyclohexyl group among 4-substituted cyclohexyl groups, can afford a liquid crystal display device improved in display contrast and good stability due to no photochemical reaction of the liquid crystal composition.Type: GrantFiled: September 29, 1982Date of Patent: June 25, 1991Assignees: Hitachi, Ltd., Mitsubishi Kasei CorporationInventors: Masaharu Kaneko, Tetsuo Ozawa, Tomio Yoneyama, Shuji Imazeki, Akio Mukoh, Mikio Sato
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Patent number: 4912000Abstract: An electrophotographic photoreceptor comprises an electrically conductive support, a photoconductive layer provided thereon, and a protective layer coated on the photoconductive layer, wherein the protective layer comprises a product of uncatalized hydrolysis of a composition essentially consisting of at least one specific epoxysilane compound, at least one specific alkylalkoxysilane compound, and at least one specific aminosilane compound. The photoreceptor is very useful in that it is free from wear due to friction with paper and cleaning members, keeps high resolving power, and is sufficiently proof against continuous copying under conditions of high temperature and high humidity.Type: GrantFiled: January 30, 1989Date of Patent: March 27, 1990Assignees: Japan Atomic Energy Research Institute, Shindengen Electric Manufacturing Co., Yamanashi Electronics Co., Ltd.Inventors: Minoru Kumakura, Isao Kaetsu, Masahiro Horigome, Tsuneo Isomura, Tomio Yoneyama, Tadaichi Murata
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Patent number: 4841037Abstract: A naphthalene trisazo compound represented by the general formula (I) or (II): ##STR1## wherein A and B each represents a substituted or unsubstituted benzene or naphthalene ring; m represents zero or 1; and M represents an alkali metal atom, ammonium or H.Am (wherein Am represents an amine); or ##STR2## wherein X represents a hydrogen atom, a lower alkyl group, a phenyl group or a phenyl group substituted by --SO.sub.3 M; m represents zero or 1; M represents an alkali metal atom, ammonium or H.Am (wherein Am represents an amine); A, B and C each represents a substituted or an unsubstituted benzene or naphthalene ring, provided that B and C do not represent a naphthalene ring at the same time. A recording liquid containing these compounds is suitable for use in an ink-jet recording system.Type: GrantFiled: June 10, 1986Date of Patent: June 20, 1989Assignees: Canon Kabushiki Kaisha, Mitsubishi Chemical Industries LimitedInventors: Tokuya Ohta, Masatsune Kobayashi, Yuko Suga, Konoe Miura, Hiroshi Takimoto, Tomio Yoneyama
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Patent number: 4765838Abstract: A black recording liquid suitable for use in ink-jet recording or as an ink for writing instruments comprises at least two water-soluble dyes and a liquid medium. Each of the dyes satisfies the condition defined by the following expression [I], and a mixture of these dyes satisfies the condition defined by the following expression [II]. ##EQU1## In these expressions, a* and b* are chromaticness indices defined in the CIE 1976 (L*, a*, b*) space, i indicates the ith dye of the dyes used together, and n is an integer of 2 or more.Type: GrantFiled: August 11, 1986Date of Patent: August 23, 1988Assignees: Mitsubishi Chemical Industries Ltd., Canon Kabushiki KaishaInventors: Tokuya Ohata, Masatsune Kobayashi, Yuko Suga, Konoe Miura, Hiroshi Takimoto, Tomio Yoneyama