Patents by Inventor Michihiro Gonda
Michihiro Gonda 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: 20160152831Abstract: The present invention relates to a colorant for hair dyeing containing a compound represented by the following general formula (I), a composition for hair dyeing containing the same, and a hair dyeing method: (in the formula, R1, R2 and R3 each independently represent a hydrogen atom, a linear or branched alkyl group having from 1 to 6 carbon atoms, or a linear or branched alkoxy group having from 1 to 6 carbon atoms, and An? represents an inorganic anion or an organic anion).Type: ApplicationFiled: June 10, 2014Publication date: June 2, 2016Applicant: HODOGAYA CHEMICAL CO., LTD.Inventors: Mitsuhiro AKIBA, Kenichiro SUZUKI, Michihiro GONDA, Masatoshi ISOBE
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Patent number: 5041560Abstract: A novel fluoran compound represented by the formula (I): ##STR1## is disclosed. By using the novel fluoran compound (I) as a chromogenic substance, a pressure-sensitive record material is provided which can develop an image of a clear vermilion color when it contacts a developer of an acidic substance.Type: GrantFiled: July 10, 1989Date of Patent: August 20, 1991Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masahiko Yamaguchi, Katsumasa Kikkawa, Michihiro Gonda
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Patent number: 4912259Abstract: A pentadiene compound of the formula: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a C.sub.1 -C.sub.4 alkyl group or a substituted or unsubstituted aryl or aralkyl group, R.sub.5 is an alkyl group, and X is a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group, a C.sub.1 -C.sub.4 alkoxy group or a halogen atom.Type: GrantFiled: August 5, 1988Date of Patent: March 27, 1990Assignee: Hodogaya Chemical Co., Ltd.Inventors: Kazuo Kaneko, Masahiko Yamaguchi, Michihiro Gonda, Kensaku Okano, Kazuyuki Wakasugi
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Patent number: 4839334Abstract: A heat sensitive recording sheet having a heat sensitive color forming layer wherein a mixture of fluoran compounds of the following formulas I and II is used as a color former; ##STR1## wherein R.sub.1 is a hydrogen atom, an alkyl group having from 1 to 8 carbon atoms, a tetrahydrofurfuryl group, a substituted or unsubstituted phenyl group or a cycloalkyl group, R.sub.2 is a hydrogen atom, a chlorine atom, a fluorine atom, a lower alkyl group, a lower alkoxy group, a lower alkoxyalkyl group, a phenyl group or a benzyl group, and R.sub.3 is a hydrogen atom, a chlorine atom, a fluorine atom, a bromine atom, a lower alkyl group or an acyl group; and ##STR2## wherein each of R.sub.4 and R.sub.5 is a hydrogen atom, an alkyl group having from 1 to 8 carbon atoms, a substituted or unsubstituted phenyl group or a cycloalkyl group, or R.sup.4 and R.sub.5 may, together with the adjacent nitrogen atom, form a ring of the formula ##STR3## each of R.sub.6 and R.sub.Type: GrantFiled: January 12, 1987Date of Patent: June 13, 1989Assignee: Hodogaya Chemical Co, Ltd.Inventors: Toshiyuki Abe, Katsumasa Kikkawa, Michihiro Gonda, Hideyuki Sensui, Mikiko Kanasugi
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Patent number: 4749796Abstract: This invention relates to a xanthene derivative that develops color on oxidation, so that it is favorably used for a photoresist, a PS plate or a proofing agent. The xanthene derivative, which has the following structural formula (I), is produced by putting a fluoran derivative represented by the following structural formula (II) to an esterification reaction and then to a reduction reaction. ##STR1## In the above formulae R.sub.1 and R.sub.2 independently stand for hydrogen, an alkyl radical with 1 to 8 carbon atoms, a tetrahydrofurfuryl radical, a substitued or an unsubstituted phenyl radical, a substituted or an unsubstituted benzyl radical or a cyclic alkyl radical; in addition, R.sub.1 and R.sub.2 are able to form a ring in pairs. R.sub.3 and R.sub.6 independently stand for hydrogen, chlorine, fluorine, a lower alkyl radical or a lower alkoxy radical. R.sub.4 and R.sub.Type: GrantFiled: December 6, 1985Date of Patent: June 7, 1988Assignee: Hodogaya Chemical Co., Ltd.Inventors: Hideyuki Sensui, Michihiro Gonda, Toshio Obara
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Patent number: 4694088Abstract: A fluoran compound represented by general formula (I): ##STR1## wherein R.sub.1 represents a straight or branched alkyl group having 1 to 8 carbon atoms, a cyclohexyl (C.sub.1 -C.sub.2) alkyl group, a cyclohexyl group, a phenyl group which may be substituted by chlorine, an alkoxyalkyl group, a benzyl group which may be substituted by chlorine, or a hydrogen atom;, R.sub.2 represents a hydrogen atom, a halogen atom, a lower alkyl group having 1 to 4 carbon atoms, a phenyl group which may be substituted by chlorine, a benzyl group which may be substituted by chlorine, a lower alkoxy group or a lower alkoxyalkyl group; R.sub.3 represents a hydrogen atom, a chlorine atom, a fluorine atom or a lower alkyl group having 1 to 4 carbon atoms; and n is 2.Type: GrantFiled: November 25, 1985Date of Patent: September 15, 1987Assignee: Hodogaya Chemical Co., Ltd.Inventors: Kazuo Kaneko, Susumu Suzuka, Michihiro Gonda, Mikiko Kanasugi
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Patent number: 4642663Abstract: A novel 6-tetrahydrofurfurylaminofluoran compound useful as a color former (precursory colorant) for a heat-sensitive recording sheet is of the formula (I): ##STR1## wherein R.sub.1 is H, C.sub.1-8 alkyl, tetrahydrofurfuryl, phenyl alkyl(C.sub.1-5)phenyl, or C.sub.3-8 cyclic alkyl, R.sub.2 is H, Cl, F, C.sub.1-5 alkyl, C.sub.1-5 alkoxy, C.sub.2-10 alkoxyalkyl, phenyl or benzyl, and R.sub.3 is H, Cl, F, C.sub.1-5 alkyl and C.sub.2-7 acryl.Type: GrantFiled: December 16, 1985Date of Patent: February 10, 1987Assignee: Hodogaya Chemical Co., Ltd.Inventors: Hideyuki Sensui, Susumu Suzuka, Michihiro Gonda, Katsumasa Kikkawa
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Patent number: 4612558Abstract: A fluoran compound having the formula: ##STR1## wherein each of R.sub.1 and R.sub.2 is a hydrogen atom, a straight chain or branched alkyl group having from 1 to 8 carbon atoms, a cyclohexyl group, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted benzyl group, Q is ##STR2## (wherein X is a hydrogen atom, a halogen atom, or a straight chain or branched alkyl group having from 1 to 8 carbon atoms), ##STR3## (wherein X is as defined above), or --(CH.sub.2).sub.n OR.sub.4 (wherein R.sub.4 is a straight chain or branched alkyl group having from 1 to 8 carbon atoms, a cycloalkyl group, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted benzyl group, and n is an integer of from 1 to 8), and R.sub.3 is a hydrogen atom, a halogen atom, a lower fluoroalkyl group, an acyl group, an alkoxy group, an alkoxyalkyl group, or a straight chain or branched alkyl group having from 1 to 8 carbon atoms.Type: GrantFiled: March 12, 1985Date of Patent: September 16, 1986Assignee: Hodogaya Chemical Co., Ltd.Inventors: Mitsutoshi Anzai, Masahiko Yamaguchi, Kazuyuki Wakasugi, Susumu Suzuka, Michihiro Gonda, Toshiyuki Abe, Katsumasa Kikkawa, Mikiko Kanasugi
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Patent number: 4597795Abstract: A novel 6-tetrahydrofurfurylaminofluoran compound useful as a color former (precursory colorant) for a heat-sensitive recording sheet is of the formula (I): ##STR1## wherein R.sub.1 is H, C.sub.1-8 alkyl, tetrahydrofurfuryl, phenyl, alkyl(C.sub.1-5)phenyl, or C.sub.3-8 cyclic alkyl, R.sub.2 is H, Cl, F, C.sub.1-5 alkyl, C.sub.1-5 alkoxy, C.sub.2-10 alkoxyalkyl, phenyl or benzyl, and R.sub.3 is H, Cl, F, C.sub.1-5 alkyl and C.sub.2-7 acryl.Type: GrantFiled: January 22, 1985Date of Patent: July 1, 1986Assignee: Hodogaya Chemical Co., Ltd.Inventors: Hideyuki Sensui, Susumu Suzuka, Michihiro Gonda, Katsumasa Kikkawa
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Patent number: 4594601Abstract: A fluoran compound represented by general formula: ##STR1## where each of R.sub.1 and R.sub.2 is a C.sub.1 -C.sub.4 alkyl group, a cycloalkyl group or an aryl group, or R.sub.1 and R.sub.2 may form together with N a saturated ring, R.sub.3 is a benzyl or phenyl group which may be substituted, and R.sub.4 is a C.sub.1 -C.sub.4 alkyl group.Type: GrantFiled: September 23, 1983Date of Patent: June 10, 1986Assignee: Hodogaya Chemical Co., Ltd.Inventors: Mitsutoshi Anzai, Masahiko Yamaguchi, Michihiro Gonda, Mikiko Kanasugi, Toshio Obara
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Patent number: 4550329Abstract: A heat sensitive record material comprising at least one colorless or light-colored electron donative dyestuff and at least one color developing agent represented by the general formula: ##STR1## where each of R.sub.1 and R.sub.2 is hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms or a halogen atom, X is an alkyl group having from 1 to 5 carbon atoms or a halogen atom, Y is a hydroxyl group, an alkyl group having from 1 to 5 carbon atoms or a halogen atom, n is an integer of 1 to 3, and m is an integer of 1 to 4.Type: GrantFiled: August 31, 1984Date of Patent: October 29, 1985Assignee: Hodogaya Chemical Co., Ltd.Inventors: Michihiro Gonda, Katsumasa Kitsukawa, Susumu Suzuka, Mikiko Kanasugi, Yutaka Sato, Kikuo Otomo
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Patent number: 4539577Abstract: A heat sensitive record material comprising a support sheet and a heat sensitive record layer formed on the support sheet, the heat sensitive record layer being composed essentially of a colorless or light-colored electron-donating colorless dye, an acidic substance which is thermally reactive with the electron-donating colorless dye to develop a color and a binder, characterized in that said heat sensitive record layer contains an effective amount of at least one anilide compound represented by the general formula: ##STR1## where R.sub.1 is an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group; R.sub.2 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a sulfamoyl group or a halogen atom; R.sub.3 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or a halogen atom; and n is an integer of 0 to 5.Type: GrantFiled: September 14, 1984Date of Patent: September 3, 1985Assignee: Hodogaya Chemical Co., Ltd.Inventors: Kazuo Kaneko, Michihiro Gonda, Susumu Suzuka, Katsumasa Kitsukawa
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Patent number: 4510513Abstract: A heat sensitive record sheet which comprises a coated layer comprising 2-anilino-3-methyl-6-dibutylaminofluoran.Type: GrantFiled: July 13, 1983Date of Patent: April 9, 1985Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masahiko Yamaguchi, Michihiro Gonda, Yutaka Satoh, Mikiko Kanasugi
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Patent number: 4482905Abstract: A heat sensitive record material comprising a support sheet and a record layer formed on the support sheet, the record layer being composed essentially of a colorless or light-colored fluoran compound, an acidic substance which is thermally reactive with the fluoran compound to develop a color and a binder, characterized in that said record layer contains an effective amount of at least one benzenesulfonamide compound represented by the general formula: ##STR1## where R.sub.1 is a hydrogen atom, a C.sub.1 -C.sub.5 alkyl group, an acetylamino group or a halogen atom, R.sub.2 is a hydrogen atom, a C.sub.1 -C.sub.5 alkyl group, a cyclohexyl group or a phenyl group which may be substituted and R.sub.3 is a C.sub.1 -C.sub.5 alkyl group, a cyclohexyl group or a phenyl group which may be substituted, provided R.sub.2 and R.sub.3 may form together with N a saturated ring.Type: GrantFiled: July 8, 1983Date of Patent: November 13, 1984Assignee: Hodogaya Chemical Co., Ltd.Inventors: Kazuo Kaneko, Toshio Obara, Michihiro Gonda, Katsumasa Kickawa, Mikiko Kanasugi
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Patent number: 4262078Abstract: Disclosed is a light transmitting particle containing a sublimable color-former that is a pyridine derivative suitable for use in the formation of a color image. This particle can produce a clear color image having little fogging and having an excellent resolving power.Type: GrantFiled: July 23, 1979Date of Patent: April 14, 1981Assignees: Matsushita Electric Industrial Co., Ltd., Hodogaya Chemical Co., Ltd.Inventors: Eisuke Ishida, Yuji Takashima, Yoshihide Miyazawa, Katsuichi Motohashi, Michihiro Gonda
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Patent number: 3979320Abstract: A liquid crystal composition having a homogeneous alignment of the liquid crystalline molecules, comprises a liquid crystal material, for example, nematic, smectic and cholesteric liquid crystal substances, an additive effective for forming the homogeneous alignment, said additive consisting of at least one heterocyclic compound having a five or six-membered heterocyclic ring containing therein at least one atomic group selected from the class consisting of the atomic group of the formulae; ##EQU1## wherein X is a hydrogen atom or substituted or unsubstituted phenyl radical, and at least one atomic group of the formula: ##EQU2## Y, wherein Y represents an oxygen or sulfur atom, said heterocyclic compounds being different from indigo, and, if necessary, a supplementary additive effective for enhancing the dynamic scattering property of the liquid crystal material, said supplementary additive consisting of at least one substance selected from the class consisting ofA.Type: GrantFiled: September 18, 1974Date of Patent: September 7, 1976Assignees: Hodogaya Chemical Co., Ltd., Nippon Electric Company, Ltd.Inventors: Minoru Ozutsumi, Yoshitake Ohnishi, Yoshihide Miyazawa, Michihiro Gonda
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Patent number: 3975285Abstract: A liquid crystal composition having long-life dynamic light scattering properties under application of DC or AC voltage, comprising (1) at least one liquid crystalline substance selected from the group consisting of nematic and cholesteric, and (2) at least one additive selected from the group consisting of (A) mixtures of at least one first organic cyclic compound selected from the group consisting of quinone compounds, quinoneimine compounds, imino compounds, desoxybenzoin compounds, dibenzyl methane compounds and triphenyl methane compounds, with at least one second organic cyclic compound selected from the group consisting of hydroquinone compounds, aromatic amino compounds, heterocyclic amino compounds and alicyclic amino compounds, and (B) aromatic, heterocyclic and alicyclic compounds having at least one radical selected from the group consisting of carbonyl and imino radicals and at least one radical selected from the group consisting of hydroxyl and amino radicals.Type: GrantFiled: October 30, 1973Date of Patent: August 17, 1976Assignees: Hodogaya Chemical Co., Ltd., Nippon Electric Company, Ltd.Inventors: Yoshitake Ohnishi, Minoru Ozutsumi, Yoshihide Miyazawa, Michihiro Gonda
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Patent number: RE33815Abstract: A heat sensitive record sheet which comprises a coated layer comprising 2-anilino-3-methyl-6-dibutylaminofluoran.Type: GrantFiled: June 27, 1988Date of Patent: February 4, 1992Assignee: Hodogaya Chemical Co., Ltd.Inventors: Masahiko Yamaguchi, Michihiro Gonda, Yutaka Satoh, Mikiko Kanasugi