Patents by Inventor Hisatoshi Uehara
Hisatoshi Uehara 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: 20220281255Abstract: An object of the present invention is to provide: a developer that can provide a thermosensitive recording material excellent in color development sensitivity and storage stability; and a thermosensitive recording material obtained using the developer. The object is achieved by a developer including a compound represented by the following Formula (1). In Formula (1), a, A, and L are as follows: a is an integer selected from 1 to 5, A is each independently a fluoro group or a perfluoroalkyl group, and L is any of functional groups represented by the following Formula (2): wherein in Formula (2), R is a C1-C4 alkyl group, and * represents a binding site to a sulfur atom in Formula (1).Type: ApplicationFiled: May 23, 2022Publication date: September 8, 2022Applicant: Mitsubishi Chemical CorporationInventors: Junya KAWAI, Keiichiro INADA, Hisatoshi UEHARA
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Patent number: 10754065Abstract: An object of the present invention is to provide a retardation film excellent in various properties such as optical properties, heat resistance, mechanical properties, and reliability. The present invention relates to a retardation film containing a thermoplastic resin and composed of a single layer, in which the retardation film has a value of wavelength dispersion that is a ratio of retardations at a wavelength of 450 nm and at a wavelength of 550 nm being 0.75 or more and 0.92 or less; a birefringence at a wavelength of 550 nm and the wavelength dispersion satisfy a relationship of ?n?0.0140×(R450/R550)?0.0082; and a photoelastic coefficient is 25×10?12 Pa?1 or less.Type: GrantFiled: October 14, 2016Date of Patent: August 25, 2020Assignees: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo Namiki, Yuuichi Hirami, Hisatoshi Uehara, Hiroyuki Hayashi, Takashi Shimizu, Hiroshi Sumimura, Nao Murakami
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Patent number: 10732323Abstract: The retardation film of the present invention contains a resin having positive refractive index anisotropy and containing at least one bonding group of a carbonate bond and an ester bond and one or more structural units selected from the group consisting of a structural unit represented by the general formula (1) and a structural unit represented by the general formula (2), in which the value of wavelength dispersion (R450/R550) as a ratio of retardation R450 at a wavelength of 450 nm to retardation R550 at a wavelength of 550 nm is more than 0.5 and less than 1.0: (in formula (1) and formula (2), definitions of R1 to R9 are the same as in the description).Type: GrantFiled: October 14, 2016Date of Patent: August 4, 2020Assignees: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo Namiki, Yuuichi Hirami, Hisatoshi Uehara, Hiroyuki Hayashi, Takashi Shimizu, Hiroshi Sumimura, Nao Murakami
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Patent number: 10670773Abstract: The retardation film of the present invention contains a thermoplastic resin and is constituted of a single layer. A value of wavelength dispersion (R450/R550) that is a ratio of a retardation R450 at a wavelength of 450 nm and a retardation R550 at a wavelength of 550 nm is 0.70 or more and 0.85 or less; and a photoelastic coefficient is 14×10?12 Pa?1 or less.Type: GrantFiled: October 14, 2016Date of Patent: June 2, 2020Assignees: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo Namiki, Yuuichi Hirami, Hisatoshi Uehara, Hiroyuki Hayashi, Takashi Shimizu, Hiroshi Sumimura, Nao Murakami
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Patent number: 10155846Abstract: The present invention relates to a polycarbonate resin containing, in the molecule, a structure represented by the following formula (1): wherein X has a structure represented by any one of the following formula (2) to (4): wherein each of R1 to R4 independently represents a hydrogen atom or an organic group having a carbon number of 1 to 30; the organic group may have an arbitrary substituent, and any two or more members of R1 to R4 may combine with each other to form a ring, which is excellent in heat resistance, transparency, light resistance, weather resistance and mechanical strength.Type: GrantFiled: June 19, 2017Date of Patent: December 18, 2018Assignee: Mitsubishi Chemical CorporationInventors: Michiaki Fuji, Kiminori Kawakami, Kazuki Fukumoto, Hisatoshi Uehara, Kenichi Satake, Tomoko Maeda
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Patent number: 10071958Abstract: According to the present invention, it becomes possible to perform a process for converting into an ?-substituted cysteine represented by general formula (1) or a salt thereof at low cost and on an industrial scale by employing a process that is routed through a compound represented by general formula (3) to a compound represented by general formula (6). Particularly, by employing a process that is routed through a compound represented by general formula (7-2), it becomes possible to detach a tert-butyl protection group in a simple manner and to produce the compound represented by general formula (1) with high purity. Furthermore, by employing a process that is routed through tert-butylthiomethanol or a process that is routed through a compound represented by general formula (9), it becomes possible to produce a compound represented by general formula (2) without generating bischloromethylether that is an oncogenic substance.Type: GrantFiled: May 1, 2014Date of Patent: September 11, 2018Assignee: API CorporationInventors: Yuuki Asuma, Hisatoshi Uehara, Tomoko Maeda, Yasuyo Saito, Ryoma Miyake, Hiroshi Kawabata
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Publication number: 20180251424Abstract: According to the present invention, it becomes possible to perform a process for converting into an ?-substituted cysteine represented by general formula (1) or a salt thereof at low cost and on an industrial scale by employing a process that is routed through a compound represented by general formula (3) to a compound represented by general formula (6). Particularly, by employing a process that is routed through a compound represented by general formula (7-2), it becomes possible to detach a tert-butyl protection group in a simple manner and to produce the compound represented by general formula (1) with high purity. Furthermore, by employing a process that is routed through tert-butylthiomethanol or a process that is routed through a compound represented by general formula (9), it becomes possible to produce a compound represented by general formula (2) without generating bischloromethylether that is an oncogenic substance.Type: ApplicationFiled: May 14, 2018Publication date: September 6, 2018Inventors: Yuuki Asuma, Hisatoshi Uehara, Tomoko Maeda, Yasuyo Saito, Ryoma Miyake, Hiroshi Kawabata
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Patent number: 9981984Abstract: The present invention aims to provide a method for purifying cis-5-hydroxy-2-piperidinecarboxylic acid with high purity, and a method for producing its derivative. The present invention provides a method for producing a cis-5-hydroxy-2-piperidinecarboxylic acid derivative, which method comprises a step of converting cis-5-hydroxy-2-piperidinecarboxylic acid into a compound(s) of Formula (1) and/or Formula (2) (wherein R1 represents a protective group for an amino group, and R2 represents a C1-C6 alkyl group), and a method for purifying cis-5-hydroxy-2-piperidinecarboxylic acid.Type: GrantFiled: December 19, 2013Date of Patent: May 29, 2018Assignee: API CorporationInventors: Tomoko Maeda, Hisatoshi Uehara, Yasuyo Saito, Masato Murai
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Publication number: 20170283550Abstract: The present invention relates to a polycarbonate resin containing, in the molecule, a structure represented by the following formula (1): wherein X has a structure represented by any one of the following formulae (2) to (4): wherein each of R1 to R4 independently represents a hydrogen atom or an organic group having a carbon number of 1 to 30; the organic group may have an arbitrary substituent, and any two or more members of R1 to R4 may combine with each other to form a ring, which is excellent in heat resistance, transparency, light resistance, weather resistance and mechanical strength.Type: ApplicationFiled: June 19, 2017Publication date: October 5, 2017Applicant: Mitsubishi Chemical CorporationInventors: Michiaki FUJI, Kiminori KAWAKAMI, Kazuki FUKUMOTO, Hisatoshi UEHARA, Kenichi SATAKE, Tomoko MAEDA
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Publication number: 20170031060Abstract: The retardation film of the present invention contains a resin having positive refractive index anisotropy and containing at least one bonding group of a carbonate bond and an ester bond and one or more structural units selected from the group consisting of a structural unit represented by the general formula (1) and a structural unit represented by the general formula (2), in which the value of wavelength dispersion (R450/R550) as a ratio of retardation R450 at a wavelength of 450 nm to retardation R550 at a wavelength of 550 nm is more than 0.5 and less than 1.0: (in formula (1) and formula (2), definitions of R1 to R9 are the same as in the description).Type: ApplicationFiled: October 14, 2016Publication date: February 2, 2017Applicants: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo NAMIKI, Yuuichi HIRAMI, Hisatoshi UEHARA, Hiroyuki HAYASHI, Takashi SHIMIZU, Hiroshi SUMIMURA, Nao MURAKAMI
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Publication number: 20170031061Abstract: An object of the present invention is to provide a retardation film excellent in various properties such as optical properties, heat resistance, mechanical properties, and reliability. The present invention relates to a retardation film containing a thermoplastic resin and composed of a single layer, in which the retardation film has a value of wavelength dispersion that is a ratio of retardations at a wavelength of 450 nm and at a wavelength of 550 nm being 0.75 or more and 0.92 or less; a birefringence at a wavelength of 550 nm and the wavelength dispersion satisfy a relationship of ?n?0.0140×(R450/R550)?0.0082; and a photoelastic coefficient is 25×10?12 Pa?1 or less.Type: ApplicationFiled: October 14, 2016Publication date: February 2, 2017Applicants: NITTO DENKO CORPORATION, Mitsubishi Chemical CorporationInventors: Shingo NAMIKI, Yuuichi HIRAMI, Hisatoshi UEHARA, Hiroyuki HAYASHI, Takashi SHIMIZU, Hiroshi SUMIMURA, Nao MURAKAMI
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Patent number: 9518150Abstract: The invention relates to a resin composition which comprises a polymer having a divalent oligofluorene as a repeating unit therein, wherein the divalent oligofluorene contains at least two fluorene units optionally having a substituent, and the 9-positioned carbon atoms of the fluorene units bond to each other via a direct bond or via an alkylene group optionally having a substituent, an arylene group optionally having a substituent, or an aralkylene group optionally having a substituent, and a ratio of a retardation measured at a wavelength of 450 nm (Re450) to a retardation measured at a wavelength of 550 nm (Re550) satisfies the following formula (2): Re450/Re550?1.0.Type: GrantFiled: April 14, 2015Date of Patent: December 13, 2016Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Hisatoshi Uehara, Hiroyuki Hayashi, Naoko Sumitani, Haruhiko Kusaka, Shingo Namiki, Yuuichi Hirami
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Publication number: 20160083341Abstract: According to the present invention, it becomes possible to perform a process for converting into an ?-substituted cysteine represented by general formula (1) or a salt thereof at low cost and on an industrial scale by employing a process that is routed through a compound represented by general formula (3) to a compound represented by general formula (6). Particularly, by employing a process that is routed through a compound represented by general formula (7-2), it becomes possible to detach a tert-butyl protection group in a simple manner and to produce the compound represented by general formula (1) with high purity. Furthermore, by employing a process that is routed through tert-butylthiomethanol or a process that is routed through a compound represented by general formula (9), it becomes possible to produce a compound represented by general formula (2) without generating bischloromethylether that is an oncogenic substance.Type: ApplicationFiled: May 1, 2014Publication date: March 24, 2016Applicant: API CorporationInventors: Yuuki Asuma, Hisatoshi Uehara, Tomoko Maeda, Yasuyo Saito, Ryoma Miyake, Hiroshi Kawabata
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Publication number: 20150247002Abstract: The invention relates to a resin composition which comprises a polymer having a divalent oligofluorene as a repeating unit therein, wherein the divalent oligofluorene contains at least two fluorene units optionally having a substituent, and the 9-positioned carbon atoms of the fluorene units bond to each other via a direct bond or via an alkylene group optionally having a substituent, an arylene group optionally having a substituent, or an aralkylene group optionally having a substituent, and a ratio of a retardation measured at a wavelength of 450 nm (Re450) to a retardation measured at a wavelength of 550 nm (Re550) satisfies the following formula (2): Re450/Re550?1.0.Type: ApplicationFiled: April 14, 2015Publication date: September 3, 2015Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Hisatoshi UEHARA, Hiroyuki HAYASHI, Naoko SUMITANI, Haruhiko KUSAKA, Shingo NAMIKI, Yuuichi HIRAMI
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Publication number: 20150239906Abstract: The present invention aims to provide a method for purifying cis-5-hydroxy-2-piperidinecarboxylic acid with high purity, and a method for producing its derivative. The present invention provides a method for producing a cis-5-hydroxy-2-piperidinecarboxylic acid derivative, which method comprises a step of converting cis-5-hydroxy-2-piperidinecarboxylic acid into a compound(s) of Formula (1) and/or Formula (2) (wherein R1 represents a protective group for an amino group, and R2 represents a C1-C6 alkyl group), and a method for purifying cis-5-hydroxy-2-piperidinecarboxylic acid.Type: ApplicationFiled: December 19, 2013Publication date: August 27, 2015Inventors: Tomoko Maeda, Hisatoshi Uehara, Yasuyo Saito, Masato Murai
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Publication number: 20140127762Abstract: The present invention aims to provide an industrial method practically suitable for producing optically active ?-substituted prolines from an acyclic ketone compound by a small number of steps under mild conditions. The present invention relates to a production method of an optically active ?-substituted proline (4) and/or an optically active ?-substituted prolinamide (5), including (a) reacting an acyclic ketone compound (1) with at least one selected from ammonia, an ammonium salt, primary amine and a salt of primary amine, and a cyanating agent to give a cyclic nitrogen-containing compound (2), (b) hydrating the cyclic nitrogen-containing compound (2) to give an ?-substituted prolinamide (3), and (c) resolving the ?-substituted prolinamide (3) by one or more of (d) enzymatical hydrolysis, (e) resolution by diastereomeric salt formation, and (f) separation by column chromatography.Type: ApplicationFiled: March 29, 2012Publication date: May 8, 2014Inventors: Hisatoshi Uehara, Ryoma Miyake, Keisuke Bando, Hiroshi Kawabata, Tomoko Maeda
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Patent number: 8258302Abstract: It is an object of the present invention to provide 2-iminocarboxylic acid derivatives, and a practically suitable industrial method for producing benzazepinones in a short process under mild conditions. The present invention provides a method for producing a benzazepinone or a salt thereof, which comprises opening a ring of an isoquinoline derivative and subsequently converting the thus generated amine into a benzazepinone through lactamization reaction.Type: GrantFiled: January 31, 2007Date of Patent: September 4, 2012Assignee: API CorporationInventor: Hisatoshi Uehara
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Publication number: 20100298550Abstract: It is an object of the present invention to provide a process for producing 1,2,3-tri-O-acetyl-5-deoxy-ribofuranose in an industrially appropriate manner. The present invention provides a process for producing a 1,2,3-tri-O-acetyl-5-deoxy-ribofuranose which comprises hydrogenating a compound represented by the formula (1) or formula (2) in the presence of a metal catalyst: wherein P1 and P2 independently represent a hydrogen atom or an acyl group, OP1 and OP2 may together form an acetal group, and R represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, or an acyl group; wherein X1 represents Br or I, P3 and P4 independently represent a hydrogen atom or an acyl group, and R represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, or an acyl group.Type: ApplicationFiled: October 3, 2008Publication date: November 25, 2010Applicant: API CORPORATIONInventors: Tomoko Maeda, Hisatoshi Uehara, Naoki Harada, Manabu Katsurada, Mitsuharu Sano
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Patent number: 7659409Abstract: The object of the present invention is to provide 3-hydroxy-3-(2-thienyl)propionamides useful as synthesis intermediates of pharmaceutical preparations and the like and a method for obtaining optically active 3-amino-1-(2-thienyl)-1-propanols using the same with high reaction yield, high optical yield and industrially low cost. According to the present invention, 3-amino-1-(2-thienyl)-1-propanols are obtained by carrying out asymmetric reduction of a ?-ketocarbonyl compound having thiophene ring in the presence of a catalyst constituted from a compound of a group VIII or IX metal in the periodic table (e.g., a ruthenium compound) and an asymmetric ligand represented by a specified optically active diamine derivative (e.g., a diphenylethylenediamine derivative), or using a cell, a treated product of said cell or the like of a microorganism, and as occasion demands, carrying out amidation of the ester group and then carrying out reduction of the amido group.Type: GrantFiled: September 20, 2004Date of Patent: February 9, 2010Assignee: Mitsubishi Chemical CorporationInventors: Jun Takehara, Jingping Qu, Kazuaki Kanno, Hiroshi Kawabata, Yasumasa Dekishima, Makoto Ueda, Kyoko Endo, Takeshi Murakami, Tomoko Sasaki, Hisatoshi Uehara, Youichi Matsumoto, Shihomi Suzuki
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Publication number: 20090171090Abstract: It is an object of the present invention to provide 2-iminocarboxylic acid derivatives, and a practically suitable industrial method for producing benzazepinones in a short process under mild conditions. The present invention provides a method for producing a benzazepinone or a salt thereof, which comprises opening a ring of an isoquinoline derivative and subsequently converting the thus generated amine into a benzazepinone through lactamization reaction.Type: ApplicationFiled: January 31, 2007Publication date: July 2, 2009Applicant: API CORPORATIONInventor: Hisatoshi Uehara