Patents by Inventor Naoko Sumitani
Naoko Sumitani 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: 11862470Abstract: An object of the present invention is to provide a silica particle having excellent polishing characteristics and storage stability, a method for producing the silica particle, a silica sol containing the silica particles, and a polishing composition containing the silica sol. Another object of the present invention is to provide a polishing method, a method for producing a semiconductor wafer, and a method for producing a semiconductor device, which are excellent in productivity of an object to be polished. The silica particle in the present invention satisfies formula (1): y?4.2 where a d value measured by wide-angle X-ray scattering is y ?.Type: GrantFiled: August 13, 2021Date of Patent: January 2, 2024Assignee: Mitsubishi Chemical CorporationInventors: Tomohiro Kyotani, Eiji Dejima, Naoko Sumitani, Tomohiro Kato, Takeshi Sawai
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Publication number: 20220363554Abstract: An object of the present invention is to provide a silica particle, a silica sol containing the silica particle, and a polishing composition containing the silica sol, which prevent secondary aggregation, have excellent dispersion stability, and are suitable for polishing. The present invention relates to a silica particle in which an average value of a circularity coefficient measured by a field-emission scanning electron microscope is 0.90 or more, and a standard deviation of the circularity coefficient is 0.05 or less.Type: ApplicationFiled: July 26, 2022Publication date: November 17, 2022Applicant: Mitsubishi Chemical CorporationInventors: Naoko SUMITANI, Tsutomu YONEMORI, Eiji DEJIMA, Yasuhiro KAWASE
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Publication number: 20210380844Abstract: An object of the present invention is to provide a silica particle having excellent polishing characteristics and storage stability. The present invention relates to a silica particle in which a proportion of silanol groups present on a surface represented by (x/y)×100% is 15% or less, where a content of silanol groups on the surface is x mass % and a content of bulk silanol groups is y mass %.Type: ApplicationFiled: August 19, 2021Publication date: December 9, 2021Applicant: Mitsubishi Chemical CorporationInventors: Tomohiro KYOTANI, Eiji DEJIMA, Naoko SUMITANI, Tomohiro KATO, Takeshi SAWAI
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Publication number: 20210375631Abstract: An object of the present invention is to provide a silica particle having excellent polishing characteristics and storage stability, a method for producing the silica particle, a silica sol containing the silica particles, and a polishing composition containing the silica sol. Another object of the present invention is to provide a polishing method, a method for producing a semiconductor wafer, and a method for producing a semiconductor device, which are excellent in productivity of an object to be polished. The silica particle in the present invention satisfies formula (1): y?4.2 where a d value measured by wide-angle X-ray scattering is y ?.Type: ApplicationFiled: August 13, 2021Publication date: December 2, 2021Applicant: Mitsubishi Chemical CorporationInventors: Tomohiro KYOTANI, Eiji DEJIMA, Naoko SUMITANI, Tomohiro KATO, Takeshi SAWAI
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Patent number: 10851039Abstract: The present invention provides a polyhydric phenol compound which has an excellent alkali resistance and which does not cause a deterioration in color even when used as a resin raw material or a color developer. The polyhydric phenol compound includes: a bisphenol compound (A) represented by the following Formula (1) and a trisphenol compound (B) represented by the following Formula (2): [wherein R1 represents a monovalent aliphatic hydrocarbon group having from 6 to 24 carbon atoms; each of R2, R3, R4, R5 and R6 represents a monovalent hydrocarbon group having from 1 to 15 carbon atoms; and each of a, b, c, d and e represents an integer from 0 to 4]; wherein the trisphenol compound (B) is contained in an amount, in terms of absorption intensity ratio at 254 nm, of less than 1.6% by area with respect to the amount of the bisphenol compound (A).Type: GrantFiled: March 13, 2019Date of Patent: December 1, 2020Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Takeshi Nakamura, Yoshie Takami, Tomoko Maeda, Naoko Sumitani, Hiroki Shibata, Toshiki Monden
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Patent number: 10793499Abstract: The present invention provides a polyhydric phenol compound which has an excellent alkali resistance and which does not cause a deterioration in color even when used as a resin raw material or a color developer. The polyhydric phenol compound includes: a bisphenol compound (A) represented by the following Formula (1) and a trisphenol compound (B) represented by the following Formula (2): [wherein R1 represents a monovalent aliphatic hydrocarbon group having from 6 to 24 carbon atoms; each of R2, R3, R4, R5 and R6 represents a monovalent hydrocarbon group having from 1 to 15 carbon atoms; and each of a, b, c, d and e represents an integer from 0 to 4]; wherein the trisphenol compound (B) is contained in an amount, in terms of absorption intensity ratio at 254 nm, of less than 1.6% by area with respect to the amount of the bisphenol compound (A).Type: GrantFiled: March 13, 2019Date of Patent: October 6, 2020Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Takeshi Nakamura, Yoshie Takami, Tomoko Maeda, Naoko Sumitani, Hiroki Shibata, Toshiki Monden
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Publication number: 20190210947Abstract: The present invention provides a polyhydric phenol compound which has an excellent alkali resistance and which does not cause a deterioration in color even when used as a resin raw material or a color developer. The polyhydric phenol compound includes: a bisphenol compound (A) represented by the following Formula (1) and a trisphenol compound (B) represented by the following Formula (2): [wherein R1 represents a monovalent aliphatic hydrocarbon group having from 6 to 24 carbon atoms; each of R2, R3, R4, R5 and R6 represents a monovalent hydrocarbon group having from 1 to 15 carbon atoms; and each of a, b, c, d and e represents an integer from 0 to 4]; wherein the trisphenol compound (B) is contained in an amount, in terms of absorption intensity ratio at 254 nm, of less than 1.6% by area with respect to the amount of the bisphenol compound (A).Type: ApplicationFiled: March 13, 2019Publication date: July 11, 2019Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Takeshi NAKAMURA, Yoshie TAKAMI, Tomoko MAEDA, Naoko SUMITANI, Hiroki SHIBATA, Toshiki MONDEN
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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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Patent number: 9201168Abstract: The present invention provides a polymerizable inorganic particle dispersant that can achieve an inorganic-organic composite particle and inorganic-organic resin composite material, which have a high refractive index and a high Abbe's number, i.e., which can achieve both of a high refractive index and a high Abbe's number that is non-conventional in a composite with an inorganic particle. The present invention relates to a polymerizable inorganic particle dispersant comprising a compound which includes the following functional groups A, B and Q: A: Polymerizable functional group; B: Carboxyl group, Oxo acid group containing a phosphorous or Oxo acid group containing sulfur; and C: Sulfur-containing divalent or more aliphatic hydrocarbon group, which may contain a hetero atom other than sulfur.Type: GrantFiled: March 31, 2014Date of Patent: December 1, 2015Assignee: NIPPON KASEI CHEMICAL COMPANY LIMITEDInventors: Masanori Yamazaki, Naoko Sumitani, Ritsuko Yamauchi, Tomoko Maeda, Takako Takahashi
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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: 20140213725Abstract: The present invention provides a polymerizable inorganic particle dispersant that can achieve an inorganic-organic composite particle and inorganic-organic resin composite material, which have a high refractive index and a high Abbe's number, i.e., which can achieve both of a high refractive index and a high Abbe's number that is non-conventional in a composite with an inorganic particle. The present invention relates to a polymerizable inorganic particle dispersant comprising a compound which includes the following functional groups A, B and Q: A: Polymerizable functional group; B: Carboxyl group, Oxo acid group containing a phosphorous or Oxo acid group containing sulfur; and C: Sulfur-containing divalent or more aliphatic hydrocarbon group, which may contain a hetero atom other than sulfur.Type: ApplicationFiled: March 31, 2014Publication date: July 31, 2014Applicant: NIPPON KASEI CHEMICAL COMPANY LIMITEDInventors: Masanori YAMAZAKI, Naoko Sumitani, Ritsuko Yamauchi, Tomoko Maeda, Takako Takahashi
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Publication number: 20100063272Abstract: It is an object of the present invention to provide a novel method for producing a steroid compound. The present invention provides a method for producing 5?-3,7-dioxocholanic acid or an ester derivative thereof, using, as a raw material, a sterol having double bonds at position 5 and at position 24, such as cholesta-5,7,24-trien-3?-ol, ergosta-5,7,24(28)-trien-3?-ol, desmosterol, fucosterol, or ergosta-5,24(28)-dien-3?-ol, via the following 4 steps: (I) a step involving oxidation of a hydroxyl group at position 3 and isomerization of a double bond at position 5 to position 4; (II) a step involving the oxidative cleavage of a side chain to convert position 24 to a carboxyl group or an ester derivative thereof; (III) a step of introducing an oxygen functional group into position 7; and (IV) a step of constructing a 5? configuration by reductive saturation of a double bond at position 4.Type: ApplicationFiled: January 12, 2007Publication date: March 11, 2010Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Jun Takehara, Naoya Fujiwara, Kyouko Endou, Junya Kawai, Akemi Hosokawa, Naoko Sumitani
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Patent number: 6849633Abstract: The invention provides a novel pest control agent having a high systemic activity and a high safety with reduced adverse influences on the environment neighboring the place to which the agent is applied, and a process for producing the same. Namely, the present invention relates to a novel 1-aryl-3-cyano-5-heteroarylalkylaminopyrazole derivative represented by the following general formula (1) and a process for producing the same, and a pest control agent containing the same as an active ingredient. (wherein X represents N or C-halogen, R1 represents an alkyl group, an alkenyl group, an alkynyl group, or a haloalkyl group, R2 represents hydrogen atom, an alkyl group, or an acyl group, R3 represents hydrogen atom or an alkyl group, A represents any one of the groups represented by A-1 to A-4, R4 represents hydrogen atom, an alkyl group, a halogen atom, and n represents 0, 1, or 2, provided that R1 is a haloalkyl group except a perhaloalkyl group when A is A-1 and n is 0, and that n is not 0 when A is A-4.Type: GrantFiled: December 28, 2001Date of Patent: February 1, 2005Assignee: Nihon Nohyaku Co., Ltd.Inventors: Shuko Okui, Nobuo Kyomura, Toshiki Fukuchi, Ken Tanaka, Manabu Katsurada, Kazuya Okano, Naoko Sumitani, Akiko Miyauchi, Akiko Yabe
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Publication number: 20030060471Abstract: The invention provides a novel pest control agent having a high systemic activity and a high safety with reduced adverse influences on the environment neighboring the place to which the agent is applied, and a process for producing the same.Type: ApplicationFiled: December 28, 2001Publication date: March 27, 2003Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shuko Okui, Nobuo Kyomura, Toshiki Fukuchi, Ken Tanaka, Manabu Katsurada, Kazuya Okano, Naoko Sumitani, Akiko Miyauchi, Akiko Yabe
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Patent number: 5606079Abstract: A process for producing 1,4-butanedial monoacetal by reacting acrolein acetal with a synthesis gas containing carbon monoxide and hydrogen, in the presence of a rhodium catalyst and an accelerator of formula (I) ##STR1## wherein R.sup.1 and R.sup.2 each, independently, denote a hydrogen atom, a C.sub.1 -C.sub.20 alkyl group or a C.sub.6 -C.sub.20 aryl group, or R.sup.1 and R.sup.2 together form a --(CH.sub.2).sub.n -- group, n is an integer of from 2 to 7, R.sup.3 and R.sup.4 each, independently, denote halogen or a trifluoromethyl group, and p and q are each, independently, an integer of from 0 to 3, which process can also be extended to the hydroformylation of other compounds which contain an olefin group in a terminal position.Type: GrantFiled: May 30, 1995Date of Patent: February 25, 1997Assignee: Mitsubishi Chemical CorporationInventors: Shuji Ichikawa, Akiko Fujita, Naoko Sumitani, Yuji Ohgomori
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Patent number: 5589517Abstract: A modified strongly acidic ion exchange resin of a sulfonic acid type is disclosed. Modification is conducted by ionically binding a particular N,N-di-substituted mercaptoalkylamine to a strongly acidic ion exchange resin of a sulfonic acid type. The N,N-di-substituted mercaptoalkylamine is specifically represented by the following formulae: ##STR1## wherein R.sup.1 represents hydrogen or a C.sub.1-6 alkyl group, R.sup.2 and R.sup.3 independently represent a C.sub.1-10 alkyl group, a and b denote 0-3, respectively, a+b denotes 2 or 3, and m denotes 4 or 5. The modified ion exchange resin makes an improved catalyst in the preparation of a bisphenol by the condensation reaction of a phenol with a ketone.Type: GrantFiled: April 6, 1995Date of Patent: December 31, 1996Assignee: Mitsubishi Chemical CorporationInventors: Takahiro Sugawara, Michi Watanabe, Naoko Sumitani, Miwa Shirasaki, Toshitaka Suzuki
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Patent number: 5254742Abstract: A process for preparing 2-hexene-1,6-dial comprising dimerizing 2-propenal in the presence of an organometallic compound of the group VIII metal. The desired compound can be obtained under mild conditions with industrial advantages.Type: GrantFiled: October 8, 1992Date of Patent: October 19, 1993Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Yuji Ohgomori, Shuji Ichikawa, Takahiro Yoneyama, Naoko Sumitani