Patents by Inventor Kazuo Okumura
Kazuo Okumura 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: 10975305Abstract: To provide a compound having an effect of preventing photodegradation of a liquid crystal composition and high solubility in a liquid crystal composition, a liquid crystal composition containing the compound, and a liquid crystal display element containing the composition. There are provided a compound represented by M(Z-Q)m, a liquid crystal composition containing the compound, and a liquid crystal display element using the composition. Here, m is 3, 4, or 5; M is a trivalent, tetravalent, or pentavalent cyclic group, an organic group, or a group constituted by trivalent nitrogen; Z is a single bond, —O—, —COO—, or —OCO—; and Q is a monovalent group represented by Formula (Q-1): in Formula (Q-1), Ra is a hydrogen atom, —O., —OH, an alkyl group, or an alkenyl group, a terminal group (—CH3) is optionally substituted with —NHR2 or —NR3R4, and here R3 and R4 are an alkyl group.Type: GrantFiled: December 25, 2018Date of Patent: April 13, 2021Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Kazuo Okumura, Michiko Sawada
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Publication number: 20190359888Abstract: Liquid crystal compound satisfying at least one of physical properties such as high stability to heat or light, high maximum temperature, high clearing point, low minimum temperature of liquid crystal phase, small viscosity, suitable optical-anisotropy, large negative dielectric-anisotropy, suitable elastic constant and good compatibility with other liquid crystal compounds; liquid crystal composition containing the compound; and liquid crystal display device including the composition. Compound represented by formula (1), wherein R1 is alkyl having 1 to 15 carbons; R2 is alkyl having branched-chain and 3 to 15 carbons; A1, A2 are independently 1,2-cyclopropylene; Z1, Z2 are independently single bond or alkylene having 1 to 15 carbons; L1, L2 are fluorine, chlorine, —OCF3 or —OCH2F; X1, X2 are oxygen or sulfur; and a is 0 or 1, b is 0 or 1, and sum of a and b is 0, 1 or 2.Type: ApplicationFiled: May 22, 2019Publication date: November 28, 2019Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Yasuyuki GOTOH, Kazuo OKUMURA, Akihiro TAKATA, Takahiro KOBAYASHI, Michiko SAWADA
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Patent number: 10428273Abstract: Shown are a liquid crystal compound satisfying at least one of physical properties such as high stability to heat and light, a high clearing point (or high maximum temperature), low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy, a suitable elastic constant and satisfactory compatibility with other liquid crystal compounds, a liquid crystal composition containing the compound and a liquid crystal display device including the composition.Type: GrantFiled: July 21, 2017Date of Patent: October 1, 2019Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Kazuo Okumura, Tokifumi Masukawa, Keiji Kimura
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Publication number: 20190194542Abstract: To provide a compound having an effect of preventing photodegradation of a liquid crystal composition and high solubility in a liquid crystal composition, a liquid crystal composition containing the compound, and a liquid crystal display element containing the composition. There are provided a compound represented by M(Z-Q)m, a liquid crystal composition containing the compound, and a liquid crystal display element using the composition. Here, m is 3, 4, or 5; M is a trivalent, tetravalent, or pentavalent cyclic group, an organic group, or a group constituted by trivalent nitrogen; Z is a single bond, —O—, —COO—, or —OCO—; and Q is a monovalent group represented by Formula (Q-1): in Formula (Q-1), Ra is a hydrogen atom, —O—, —OII, an alkyl group, or an alkenyl group, a terminal group (—CH3) is optionally substituted with —NIIR2 or —NR3R4, and here R3 and R4 are an alkyl group.Type: ApplicationFiled: December 25, 2018Publication date: June 27, 2019Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Kazuo OKUMURA, Michiko SAWADA
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Patent number: 10253259Abstract: Subject It is to provide a polymerizable compound having a high polymerization reactivity, a high conversion yield and a high solubility in a liquid crystal composition, a polymerizable composition including this compound, a liquid crystal composite prepared from this polymerizable composition and a liquid crystal display device containing this composite. Means for solving the Subject A compound represented by formula (1), the liquid crystal composition and the liquid crystal display device. In the formula, for example, ring A1, ring A2 and ring A4 are phenylene or cyclohexylene; Sp1 and Sp2 are a single bond or alkylene having 1 to 6 carbons; Z1 and Z2 are —CH?CH— or —C?C—; a is 1, b is 0; and P1 and P2 are a polymerizable group.Type: GrantFiled: April 9, 2014Date of Patent: April 9, 2019Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Yasuyuki Gotoh, Kazuo Okumura
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Publication number: 20180127654Abstract: Provided are a compound having an effect on preventing photolysis of a liquid crystal composition, and high solubility in the liquid crystal composition, a liquid crystal composition containing the compound and a liquid crystal display device including the composition. A compound is represented by formula (1), a liquid crystal composition contains the compound and a liquid crystal display device uses the composition. In formula (1), for example, R1 is alkyl having 1 to 10 carbons; R2 is hydrogen, hydroxy, oxy radical or alkyl; ring A1, ring A2 and ring A3 are independently 1,4-cyclohexylene, 1,4-phenylene or pyridine-2,5-diyl; Z1 and Z2 are independently a single bond or alkylene; and a and b are independently 0 or 1.Type: ApplicationFiled: November 7, 2017Publication date: May 10, 2018Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Yasuyuki GOTOH, Kazuo OKUMURA
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Publication number: 20180022998Abstract: Shown are a liquid crystal compound satisfying at least one of physical properties such as high stability to heat and light, a high clearing point (or high maximum temperature), low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy, a suitable elastic constant and satisfactory compatibility with other liquid crystal compounds, a liquid crystal composition containing the compound and a liquid crystal display device including the composition. A compound is represented by formula (1), a liquid crystal composition contains the compound, or the like.Type: ApplicationFiled: July 21, 2017Publication date: January 25, 2018Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Kazuo OKUMURA, Tokifumi MASUKAWA, Keiji KIMURA
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Patent number: 9708534Abstract: To provide a liquid crystal compound having high polymerization reactivity, a high conversion ratio and high solubility in a liquid crystal composition, a polymerizable composition containing the compound, a liquid crystal composite prepared using the composition, and a liquid crystal display device including the composite. The liquid crystal display device prepared using the polymerizable composition containing the compound represented by formula (1): wherein, in formula (1), P1 to P6 are a polymerizable group; S1 to S6 are a single bond, alkylene or the like; a1, a3 and a4 are an integer from 0 to 4, a2 is an integer from 1 to 4; ring A1 to ring A4 are a divalent group derived from benzene, naphthalene, anthracene, pyrimidine, pyridine or the like; Z1 to Z3 are a single bond, alkylene or the like, and at least one of Z1, Z2 and Z3 is —C?C—; and b1 is 0 or 1.Type: GrantFiled: June 26, 2015Date of Patent: July 18, 2017Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Yasuyuki Gotoh, Kazuo Okumura, Mayumi Goto
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Patent number: 9676686Abstract: The disclosure shows a liquid crystal composition that contains a compound having an effect of preventing photolysis of the liquid crystal composition and having high solubility in the liquid crystal composition, and that satisfies at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy, large positive or negative dielectric anisotropy, large specific resistance, high stability to ultraviolet light or heat, and a suitable elastic constant, etc. and so on. The disclosure shows a liquid crystal composition that contains a compound having the following azolidine ring (Q-1) or azepane ring (Q-2), a liquid crystal display device and so on.Type: GrantFiled: January 13, 2016Date of Patent: June 13, 2017Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Yasuyuki Gotoh, Kazuo Okumura
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Patent number: 9657230Abstract: A problem is to provide a liquid crystal compound satisfying at least one physical property such as high stability to heat and light, high clearing point, low minimum temperature of liquid crystal phase, small viscosity, suitable optical anisotropy, large dielectric anisotropy, suitable elastic constant and excellent compatibility with other liquid crystal compounds, a liquid crystal composition containing the compound, and a liquid crystal display device including the composition. The compound is represented by formula (1). In formula (1), for example, R1 is alkenyl; ring A1 and ring A2 are 1,4-cyclohexylene or 1,4-phenylene; Z1, Z2, Z3 are a single bond or —COO—; X1 is hydrogen or fluorine; L1, L2, L3 and L4 are hydrogen or fluorine; and a and b are each independently 0 or 1, a sum of a and b is 1, and when a is 1, at least one of ring A1 and ring A2 is 1,4-cyclohexylene.Type: GrantFiled: March 16, 2016Date of Patent: May 23, 2017Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Kazuo Okumura, Kenji Hirata
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Publication number: 20170051206Abstract: Provided is a liquid crystal compound satisfying at least one of physical properties such as high stability to heat and light, a high clearing point (or high maximum temperature), low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large dielectric anisotropy, a suitable elastic constant and good compatibility with other liquid crystal compounds, a liquid crystal composition containing the compound, and a liquid crystal display device including the composition. A compound is represented by formula (1), for example: wherein, R1 and R2 are independently alkenyl having 2 to 10 carbons; ring A1, ring A2 and ring A3 are independently 1,4-phenylene or 1,4-phenylene in which at least one piece of hydrogen is replaced by fluorine or chlorine; Z1 and Z2 are independently alkylene having 1 to 4 carbons, and at least one of Z1 and Z2 may be a single bond; and a is 1 or 2.Type: ApplicationFiled: August 19, 2016Publication date: February 23, 2017Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Yasuyuki GOTOH, Kazuo OKUMURA
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Publication number: 20160280996Abstract: A problem is to provide a liquid crystal compound satisfying at least one physical property such as high stability to heat and light, high clearing point, low minimum temperature of liquid crystal phase, small viscosity, suitable optical anisotropy, large dielectric anisotropy, suitable elastic constant and excellent compatibility with other liquid crystal compounds, a liquid crystal composition containing the compound, and a liquid crystal display device including the composition. The compound is represented by formula (1). In formula (1), for example, R1 is alkenyl; ring A1 and ring A2 are 1,4-cyclohexylene or 1,4-phenylene; Z1, Z2, Z3 are a single bond or —COO—; X1 is hydrogen or fluorine; L1, L2, L3 and L4 are hydrogen or fluorine; and a and b are each independently 0 or 1, a sum of a and b is 1, and when a is 1, at least one of ring A1 and ring A2 is 1,4-cyclohexylene.Type: ApplicationFiled: March 16, 2016Publication date: September 29, 2016Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Kazuo OKUMURA, Kenji HIRATA
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Publication number: 20160208172Abstract: The disclosure shows a liquid crystal composition that contains a compound having an effect of preventing photolysis of the liquid crystal composition and having high solubility in the liquid crystal composition, and that satisfies at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy, large positive or negative dielectric anisotropy, large specific resistance, high stability to ultraviolet light or heat, and a suitable elastic constant, etc. and so on. The disclosure shows a liquid crystal composition that contains a compound having the following azolidine ring (Q-1) or azepane ring (Q-2), a liquid crystal display device and so on.Type: ApplicationFiled: January 13, 2016Publication date: July 21, 2016Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: YASUYUKI GOTOH, KAZUO OKUMURA
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Publication number: 20150376505Abstract: To provide a liquid crystal compound having high polymerization reactivity, a high conversion ratio and high solubility in a liquid crystal composition, a polymerizable composition containing the compound, a liquid crystal composite prepared using the composition, and a liquid crystal display device including the composite. The liquid crystal display device prepared using the polymerizable composition containing the compound represented by formula (1): wherein, in formula (1), P1 to P6 are a polymerizable group; S1 to S6 are a single bond, alkylene or the like; a1, a3 and a4 are an integer from 0 to 4, a2 is an integer from 1 to 4; ring A1 to ring A4 are a divalent group derived from benzene, naphthalene, anthracene, pyrimidine, pyridine or the like; Z1 to Z3 are a single bond, alkylene or the like, and at least one of Z1, Z2 and Z3 is —C?C—; and b1 is 0 or 1.Type: ApplicationFiled: June 26, 2015Publication date: December 31, 2015Inventors: Yasuyuki GOTOH, Kazuo OKUMURA, Mayumi GOTO
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Publication number: 20140312274Abstract: Subject It is to provide a polymerizable compound having a high polymerization reactivity, a high conversion yield and a high solubility in a liquid crystal composition, a polymerizable composition including this compound, a liquid crystal composite prepared from this polymerizable composition and a liquid crystal display device containing this composite. Means for solving the Subject A compound represented by formula (1), the liquid crystal composition and the liquid crystal display device. In the formula, for example, ring A1, ring A2 and ring A4 are phenylene or cyclohexylene; Sp1 and Sp2 are a single bond or alkylene having 1 to 6 carbons; Z1 and Z2 are —CH?CH— or —C?C—; a is 1, b is 0; and P1 and P2 are a polymerizable group.Type: ApplicationFiled: April 9, 2014Publication date: October 23, 2014Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Yasuyuki GOTOH, Kazuo OKUMURA
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Patent number: 7279218Abstract: Disclosed is a coated body for members of an electronic device, comprising a substrate covered, on the surface side and back side thereof, with respective thermal radiative coatings having thermal radiation property, wherein a difference ?T1 (=T1B?T1A) between Temperature T1A, at Position T1, of the coated body used as a sample and Temperature T1B, at Position T2, of the substrate not covered with a coating used as another sample is 1.5° C. or greater, said temperatures being measured using a thermal radiation property evaluating apparatus illustrated in FIG. 1; and whereby satisfying its essential properties (maintenance of air tightness to block water or dust and reduction in size and weight), while reducing the temperature inside of the members of an electronic device (thermal radiation property).Type: GrantFiled: January 23, 2004Date of Patent: October 9, 2007Assignee: Kobe Steel, Ltd.Inventors: Takeshi Watase, Yasuo Hirano, Kazuo Okumura, Tetsuya Yamamoto
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Publication number: 20070112037Abstract: A compound of the formula (I): wherein R1 is hydrogen or lower alkyl; R2 is lower alkyl, etc.; R3 is lower alkoxy, etc.; R4 is hydroxy, etc.; X is O, S, etc.; Y is CH or N; Z is lower alkylene or lower alkenylene; and m is 0 or 1; or salts thereof, which are useful as a medicament.Type: ApplicationFiled: December 13, 2006Publication date: May 17, 2007Applicant: FUJISAWA PHARMACEUTICAL CO., LTD.Inventors: Fumiyuki SHIRAI, Hidenori Azami, Natsuko Kayakiri, Kazuo Okumura, Katsuya Nakamura
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Patent number: 7183306Abstract: A compound of the formula (I): wherein R1 is hydrogen or lower alkyl; R2 is lower alkyl, etc.; R3 is lower alkoxy, etc.; R4 is hydroxy, etc.; X is O, S, etc.; Y is CH or N; Z is lower alkylene or lower alkenylene; and m is 0 or 1; or salts thereof, which are useful as a medicament.Type: GrantFiled: November 14, 2003Date of Patent: February 27, 2007Assignee: Astellas Pharma Inc.Inventors: Fumiyuki Shirai, Hidenori Azami, Natsuko Kayakiri, Kazuo Okumura, Katsuya Nakamura
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Patent number: 6927243Abstract: The present invention relates to a photocurable resin composition which contains a photocurable component and forms on a substrate a photocurable resin layer having a viscosity of 1000-500,000 Pa·s at 23° C. and 65% RH. This resin composition is formed into a photocurable resin layer, which is laminated onto a metal sheet to give a metal sheet with a photocurable resin layer laminated thereon. This metal sheet can be worked and converted into a metal part with a high-hardness protective coating laminated thereon upon irradiation with light or electron beams after working.Type: GrantFiled: January 22, 2002Date of Patent: August 9, 2005Assignee: Kobe Steel, Ltd.Inventors: Takeshi Watase, Yasuo Hirano, Kazuo Okumura, Atsushi Kihara, Yukihisa Komiya, Tadashige Nakamoto, Takahiro Kobayashi, Takeshi Ohwaki, Mika Nishida, Etsuji Ueno
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Publication number: 20050163983Abstract: Disclosed is a coated body for members of an electronic device, comprising a substrate covered, on the surface side and back side thereof, with respective thermal radiative coatings having thermal radiation property, wherein a difference ?T1 (=T1B?T1A) between Temperature T1A, at Position T1, of the coated body used as a sample and Temperature T1B, at Position T2, of the substrate not covered with a coating used as another sample is 1.5° C. or greater, said temperatures being measured using a thermal radiation property evaluating apparatus illustrated in FIG. 1; and whereby satisfying its essential properties (maintenance of air tightness to block water or dust and reduction in size and weight), while reducing the temperature inside of the members of an electronic device (thermal radiation property).Type: ApplicationFiled: January 23, 2004Publication date: July 28, 2005Applicant: Kabushiki Kaisha Kobe Seiko Sho(Kobe Steel, Ltd.)Inventors: Takeshi Watase, Yasuo Hirano, Kazuo Okumura, Tetsuya Yamamoto