Patents by Inventor Takahisa Oguchi
Takahisa Oguchi 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: 6734276Abstract: The invention is a polyimide, random copolymer having repeating units of the formula (1): wherein R1 and R2 each represent a divalent group selected from and R1 and R2 may be the same or different; and x=0.60 to 0.80, y+z=0.40 to 0.20, and x+y+z=1.00, and a linear expansion coefficient at 100 to 200° C. is in the range of from 10 to 20 ppm/K. This is a useful polyimide that can be a polyimide circuit substrate material capable of keeping flat, neither shrinking nor expanding in its laminate.Type: GrantFiled: April 11, 2002Date of Patent: May 11, 2004Assignee: Mitsui Chemicals, Inc.Inventors: Wataru Yamashita, Katsuji Watanabe, Takahisa Oguchi
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Publication number: 20030013838Abstract: The invention is a polyimide, random copolymer having repeating units of the formula (1): 1Type: ApplicationFiled: April 11, 2002Publication date: January 16, 2003Inventors: Wataru Yamashita, Katsuji Watanabe, Takahisa Oguchi
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Patent number: 5969138Abstract: Since a compound represented by general formula (1), its pharmaceutically acceptable salt and a hydrate of the pharmaceutically acceptable salt have high antipsychotic activity, they may be used as an active ingredient for preparation of an antipsychotic. ##STR1## Also provided are an optical resolution method of the above compound and an intermediate for preparation of the compound.Type: GrantFiled: October 30, 1997Date of Patent: October 19, 1999Assignee: Mitsui Chemicals, Inc.Inventors: Naruyoshi Mita, Hiroshi Nagase, Hajime Iizuka, Takahisa Oguchi, Kazuya Sakai, Kazutoshi Horikomi, Takaichi Miwa, Shinji Takahashi
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Patent number: 5750229Abstract: A phthalocyanine represented by the formula (1) ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently an alkyl group substituted by 0 to 5 halogen atoms and having 1 to 20 carbon atoms, an alkenyl group substituted by 0 to 5 halogen atoms and having 2 to 20 carbon atoms or an alkynyl group substituted by 0 to 5 halogen atoms and having 2 to 20 carbon atoms, and at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is substituted by the halogen atom; X is a halogen atom; each of k, l, m and n is independently a value of from 0 to 3; each of o, p, q and r is independently a value of 0, 1 or 2, and all of them are not 0 simultaneously; each sum of k and o, l and p, m and q, and n and r is independently in the range of from 0 to 4; Met is two hydrogen atoms, a di, monosubstituted tri, disubstituted ter metal atom or an oxymetal atom. The above phthalocyanins can be used to provide optical recording medium.Type: GrantFiled: January 6, 1997Date of Patent: May 12, 1998Assignees: Mitsui Toatsu Chemicals, Inc., Yamamoto Chemicals, Inc.Inventors: Takahisa Oguchi, Hideki Umehara, Kenichi Sugimoto, Ryu Oi, Hisato Itoh
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Patent number: 5695911Abstract: Phthalocyanine compounds represented by the below-described formula are suitable for use in the fabrication of color filters. ##STR1## wherein R.sup.1, R.sup.4, R.sup.5, R.sup.8, R.sup.9, R.sup.12, R.sup.13 and R.sup.16 represent a group represented by the below-described formula, H or a halogen atom, R.sup.2, R.sup.3, R.sup.6, R.sup.7, R.sup.10, R.sup.11, R.sup.14 and R.sup.15 represent an alkyl, alkoxyl, alkylthio, alkylamino, dialkylamino or aryloxyl, arylthio group or --COOR.sup.17, R.sup.17 being a particular monovalent group, H or a halogen atom; and Met represents a metal atom. ##STR2## wherein X and Z represent O or S, R.sup.18, R.sup.19 and R.sup.20 represent H or an alkyl group, A, B and D represent a connecting group, n and l is an integer of 0-10, m, q, t, u, r and w are an integer of 0-2, and p is 0 or 1.Type: GrantFiled: November 17, 1995Date of Patent: December 9, 1997Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisato Itoh, Akio Karasawa, Kenichi Sugimoto, Takahisa Oguchi, Shin Aihara
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Patent number: 5646273Abstract: A phthalocyanine represented by the formula (1) ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently an alkyl group substituted by 0 to 5 halogen atoms and having 1 to 20 carbon atoms, an alkenyl group substituted by 0 to 5 halogen atoms and having 2 to 20 carbon atoms or an alkynyl group substituted by 0 to 5 halogen atoms and having 2 to 20 carbon atoms, and at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.Type: GrantFiled: September 20, 1995Date of Patent: July 8, 1997Assignees: Mitsui Toatsu Chemicals, Inc., Yamamoto Chemicals, Inc.Inventors: Takahisa Oguchi, Hideki Umehara, Kenichi Sugimoto, Ryu Oi, Hisato Itoh
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Patent number: 5582774Abstract: Near-infrared absorbers which contain phthalocyanine derivatives in which the four benzene rings contained in the molecule independently have 1 to 4 substituents are light and thermal resistant and possess high molar extinction coefficients. Such near-infrared absorbers are useful in optical recording media, near-infrared absorption filters, and liquid crystal display devices.Type: GrantFiled: February 26, 1991Date of Patent: December 10, 1996Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisato Itoh, Katashi Enomoto, Takahisa Oguchi, Tsutomu Nishizawa
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Patent number: 5538985Abstract: Antipsychotics and ischemic cerebral disease therapeutics comprising as an effective ingredient a compound represented by the following formula (1) or (2): ##STR1## or a salt thereof. These drugs do not induce extrapyramidal side effects.Type: GrantFiled: January 24, 1995Date of Patent: July 23, 1996Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Hajime Iizuka, Takahisa Oguchi, Yoji Aoki, Norio Ohto, Kazutoshi Horikomi, Takaichi Miwa, Takeshi Kamioka, Shoji Kawashima
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Patent number: 5449587Abstract: The invention discloses a CD-WO type optical recording medium which has a constitution obtained by successively laminating a recording layer, a metal reflection layer and a protective layer; is prepared by using in the recording layer a colorant having a melting point of 150.degree. to 300.degree. C., decomposition initiating temperature of 200.degree. to 350.degree. C., and .lambda. max of 720 nm; and has high sensitivity, low recording distortion and high durability. The colorant can be enhanced its effect by introducing halogen atoms.Type: GrantFiled: February 7, 1994Date of Patent: September 12, 1995Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisato Itoh, Takahisa Oguchi, Katashi Enomoto, Tsutomu Nishizawa
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Patent number: 5446141Abstract: Near-infrared absorbers which contain phthalocyanine derivatives in which the four benzene rings contained in the molecule independently have 1 to 4 substituents are light and thermal resistant and possess high molar extinction coefficients. Such near-infrared absorbers are useful in optical recording media, near-infrared absorption filters, and liquid crystal display devices.Type: GrantFiled: September 17, 1992Date of Patent: August 29, 1995Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisato Itoh, Katashi Enomoto, Takahisa Oguchi, Tsutomu Nishizawa
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Patent number: 5446142Abstract: The present invention provides a light-absorbing compound represented by the formula (I):Dye-(OR.sup.1)(OR.sup.2)(OR.sup.3) . . . (OR.sup.n) (I)wherein Dye is a light-absorbing compound residue having at least one aromatic ring; OR.sup.1 to OR.sup.n are substituents on the aromatic ring, and are independently (a) substituted or unsubstituted saturated hydrocarbonoxy groups having 1 to 20 carbon atoms, or (b) substituted or unsubstituted unsaturated hydrocarbonoxy groups having 2 to 20 carbon atoms, and at least one of OR.sup.1 to OR.sup.n is an unsaturated hydrocarbonoxy group; and n is a value of from 1 to 10. The present invention also provides an optical recording medium containing the above-mentioned light-absorbing compound in a recording layer.Type: GrantFiled: June 11, 1993Date of Patent: August 29, 1995Assignees: Mitsui Toatsu Chemicals, Inc., Yamamoto Chemicals, Inc.Inventors: Hisato Itoh, Takahisa Oguchi, Kenichi Sugimoto, Ryu Oi, Hideki Umehara, Shin Aihara
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Patent number: 5409634Abstract: Near infrared absorbers which have a molecular extinction coefficient of 200,000 or more and are represented by the formula (I) ##STR1## wherein each of Y.sup.1, Y.sup.2, Y.sup.3, Y.sup.4, Y.sup.5, Y.sup.6, Y.sup.7 and Y.sup.8 is hydrogen, an alkyl group, alkoxyl group or alkylthio group; each of A.sup.1, A.sup.2, A.sup.3, A.sup.4, A.sup.5, A.sup.6, A.sup.7 and A.sup.8 is hydrogen, halogen, a nitro group, alkyl group, aralkyl group, alkenyl group, alkynyl group, alkoxyl group, aryloxy group, alkylthio group or arylthio group; and Met represents two hydrogen atoms or a metal, are useful for the production of optical display and recording materials.Type: GrantFiled: December 11, 1991Date of Patent: April 25, 1995Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisato Itoh, Katashi Enomoto, Takahisa Oguchi, Tutomu Nishizawa
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Patent number: 5387678Abstract: Halogenated alkoxyphthalocyanine having a controlled grade of halogenation can be prepared by reacting a single compound or a mixture of phthalocyanine represented by the formula (1): ##STR1## wherein R.sup.1 is a substituted or unsubstituted alkyl group and may be the same or different, and Met is two hydrogen atoms, a divalent metal atom or a trivalent or tetravalent metal derivative, with 1 to 6 mole ratio of a halogenating agent at 0.degree. to 260.degree. C. in a solvent of from 1 to 1000 times by weight.Type: GrantFiled: June 3, 1993Date of Patent: February 7, 1995Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisato Itoh, Takahisa Oguchi, Shin Aihara
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Patent number: 5380842Abstract: Phthalocyanine compounds represented by the below-described formula are suitable for use in the fabrication of color filters. ##STR1## wherein R.sup.1, R.sup.4, R.sup.5, R.sup.8, R.sup.9, R.sup.12, R.sup.13 and R.sup.16 represent a group represented by the below-described formula, H or a halogen atom, R.sup.2, R.sup.3, R.sup.6, R.sup.7, R.sup.10, R.sup.11, R.sup.14 and R.sup.15 represent an alkyl, alkoxyl, alkylthio, alkylamino, dialkylamino or aryloxyl, arylthio group or --COOR.sup.17, R.sup.17 being a particular monovalent group, H or a halogen atom; and Met represents a metal atom. ##STR2## wherein X and Z represent O or S, R.sup.18, R.sup.19 and R.sup.20 represent H or an alkyl group, A, B and D represent a connecting group, n and l is an integer of 0-10, m, q, t, u, r and w are an integer of 0-2, and p is 0 or 1.Type: GrantFiled: June 22, 1992Date of Patent: January 10, 1995Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisato Itoh, Akio Karasawa, Kenichi Sugimoto, Takahisa Oguchi, Shin Aihara
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Patent number: 5358833Abstract: There are here disclosed an amorphous alkoxyphthalocyanine which is a compound or a mixture of compounds represented by the formula (1) shown in claim 1; and a method for preparing this amorphous alkoxyphthalocyanine which comprises the step of heating a crystalline phthalocyanine compound or a mixture of crystalline phthalocyanine compounds in an organic solvent.Type: GrantFiled: June 19, 1992Date of Patent: October 25, 1994Assignees: Mitsui Toatsu Chemicals, Inc., Yamamoto Chemicals, Inc.Inventors: Hisato Itoh, Takahisa Oguchi, Shin Aihara, Kenichi Sugimoto
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Patent number: 5350843Abstract: A method for preparing a mixture of the halogenated alkoxyphthalocyanines represented by the formula (8) which comprises the step of reacting alkoxyphthalocyanines represented by the formula (7) and a mixture thereof with a halogenating agent in a mixed solvent of an organic solvent and water.Type: GrantFiled: July 6, 1992Date of Patent: September 27, 1994Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisato Itoh, Takahisa Oguchi, Shin Aihara, Kenichi Sugimoto
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Patent number: 5334714Abstract: There is here disclosed a method for preparing an alkoxyphthalocyanine represented by the formula (1): ##STR1## wherein each of Rs is independently a secondary alkyl group having 3 to 20 carbon atoms, Met is a divalent metal atom or an oxy metal, and the substitution positions of -ORs are the 1- or 4-position, the 5- or 8-position, the 9- or 12 position, and the 13- or 16-position, which comprises the steps of heating a mixture of 3-alkoxyphthalonitrile and an organic base in an alcohol to 90.degree.-120.degree. C., adding a metal derivative at the same temperature, and then carrying out reaction, or alternatively the step of reacting a mixture of a 1,3-diimino-4-alkoxyisoindoline and a metal derivative in the presence or absence of an organic base in an aliphatic alcohol having 6 or more carbon atoms. In addition, the ratio of isomers of the alkoxyphthalocyanine can be controlled by regulating the addition time of the organic base.Type: GrantFiled: March 2, 1993Date of Patent: August 2, 1994Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Takahisa Oguchi, Kenichi Sugimoto, Shin Aihara, Hisato Itoh, Mansuke Matsumoto, Toshihiro Masaoka, Masakazu Nakamura
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Patent number: 5296162Abstract: Near infrared absorbers which have a molecular extinction coefficient of 200,000 or more and are represented by the formula (I) ##STR1## wherein each of Y.sup.1, Y.sup.2, Y.sup.3, Y.sup.4, Y.sup.5, Y.sup.6, Y.sup.7 and Y.sup.8 is hydrogen, an alkyl group, alkoxyl group or alkylthio group; each of A.sup.1, A.sup.2, A.sup.3, A.sup.4, A.sup.5, A.sup.6, A.sup.7 and A.sup.8 is hydrogen, halogen, a nitro group, alkyl group, aralkyl group, alkenyl group, alkynyl group, alkoxyl group, aryloxy group, alkylthio group or arylthio group; and Met represents two hydrogen atoms or a metal, are useful for the production of optical display and recording materials.Type: GrantFiled: March 2, 1992Date of Patent: March 22, 1994Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisao Itoh, Katashi Enomoto, Takahisa Oguchi, Tutomu Nishizawa
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Patent number: 5280114Abstract: Halogenated alkoxyphthalocyanine having a controlled grade of halogenation can be prepared by reacting a single compound or a mixture of phthalocyanine represented by the formula (1): ##STR1## wherein R.sup.1 is a substituted or unsubstituted alkyl group and may be the same or different, and Met is two hydrogen atoms, a divalent metal atom or a trivalent or tetravalent metal derivative, with 1 to 6 mole ratio of a halogenating agent at 0.degree. to 260.degree. C. in a solvent of from 1 to 1000 times by weight.Type: GrantFiled: July 12, 1991Date of Patent: January 18, 1994Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisato Itoh, Takahisa Oguchi, Shin Aihara
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Patent number: 5270463Abstract: A method for preparing a halogenated alkoxyphthalocyanine represented by the formula (7) ##STR1## wherein R.sup.3 to R.sup.6 may be different and each of them is a secondary alkyl group, X is a halogen atom, n is the number of X and in the range of from 1 to 4, and Met is two hydrogen atoms, a divalent metal atom, or a trivalent or a tetravalent metallic derivative, which comprises the step of reacting a metal or a metallic compound with one to four kinds of raw materials selected from the group consisting of phthalonitriles represented by the following formula (1) and diiminoisoindolines represented by the following formula (2) ##STR2## wherein R.sup.1 is a secondary alkyl group, X is a halogen atom, and each of p and q is 0 or 1, but in at least one raw material, p or q is 1, and halogenated alkoxyphthalocyanine prepared by said method.Type: GrantFiled: July 1, 1991Date of Patent: December 14, 1993Assignees: Mitsui Toatsu Chemicals, Incorporated, Yamamoto Chemicals, IncorporatedInventors: Hisato Itoh, Katashi Enomoto, Takahisa Oguchi, Tutomu Nishizawa