Patents by Inventor Kenji Tsuruhara
Kenji Tsuruhara 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: 20220098135Abstract: A bisphenol composition includes 95% or more by mass of a bisphenol and 200 mass ppm or more of a compound represented by the following general formula (II): In formula (II), R21 and R22 denote a methyl group or a hydrogen atom; R22 is a methyl group when R21 is a hydrogen atom; R22 is a hydrogen atom when R21 is a methyl group; R23 to R25 independently denote a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; and R23, R24, and R25 may be bonded or cross-linked between two of the groups. A method for producing a polycarbonate resin using the bisphenol composition is also described.Type: ApplicationFiled: September 13, 2021Publication date: March 31, 2022Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Kei Uchiyama, Masashi Yokogi, Hiroki Shibata, Sora Tomita, Yuichi Yayama, Kenji Tsuruhara, Takayuki Yoshida, Yukie Nakashima, Rie Konishi, Kazuo Hirowatari
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Publication number: 20210403641Abstract: A bisphenol composition including 95% or more by mass of a bisphenol, wherein a bisphenol represented by the following general formula (II) in the bisphenol composition constitutes 150 mass ppm or more, and the bisphenol composition has a methanol dissolution color (Hazen color number) of 2 or less, In formula (II), X denotes a single bond, —CR11R12—, —O—, —CO—, —S—, —SO—, or —SO2—, R11 and R12 independently denote a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R11 and R12 may be bonded to each other to form a ring. A method for producing a polycarbonate resin using the bisphenol composition is also described.Type: ApplicationFiled: September 13, 2021Publication date: December 30, 2021Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Kei Uchiyama, Masashi Yokogi, Hiroki Shibata, Sora Tomita, Yuichi Yayama, Kenji Tsuruhara, Takayuki Yoshida, Yukie Nakashima, Rie Konishi, Kazuo Hirowatari
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Patent number: 9777152Abstract: To provide a polycarbonate resin composition excellent in surface hardness and impact strength. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO15184; (ii) the weight ratio of the polycarbonate resin (a) to the polycarbonate resin (b) in the polycarbonate resin is from 1:99 to 45:55; (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO15184; and (iv) the Charpy impact strength of the polycarbonate resin composition is higher than the Charpy impact strength of the polycarbonate resin (a).Type: GrantFiled: October 1, 2012Date of Patent: October 3, 2017Assignees: Mitsubishi Chemical Corporation, Mitsubishi Engineering-Plastics CorporationInventors: Tatsuya Hitomi, Ryouhei Nishihara, Masanori Yamamoto, Michio Nakata, Tetsurou Nobuyasu, Ryuuji Uchimura, Kazuyuki Takahashi, Kenji Tsuruhara, Tomonari Yokoyama
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Patent number: 9771477Abstract: To provide a polycarbonate resin composition excellent in the surface hardness, the heat resistance, the moldability and the flame retardancy. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the following requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO 15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184; (ii) the glass transition point Tg(a) of the polycarbonate resin (a) and the glass transition point Tg(b) of the polycarbonate resin (b) satisfy the relation of the following (Formula 1): Tg(b)?45° C. <Tg(a)<Tg(b)?10° C.??(Formula 1): and (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO 15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184.Type: GrantFiled: April 28, 2016Date of Patent: September 26, 2017Assignees: Mitsubishi Chemical Corporation, Mitsubishi Engineering-Plastics CorporationInventors: Tatsuya Hitomi, Ryouhei Nishihara, Masanori Yamamoto, Michio Nakata, Tetsurou Nobuyasu, Ryuuji Uchimura, Kazuyuki Takahashi, Kenji Tsuruhara, Tomonari Yokoyama
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Patent number: 9502947Abstract: Provided is an AC generator for a vehicle, which is improved in heat-radiation performance and vibration resistance with a simple configuration. The AC generator for a vehicle includes a rectifier which is mounted to a rear bracket (2) and is electrically connected to a stator, for rectifying an alternating current generated in the stator into a direct current. The rear bracket (2) includes a bracket main body (30) having intake windows (32) and exhaust windows (34) partitioned by ribs (33), and a bearing housing portion (41) for housing a bearing therein, a mounting leg portion (31) extending radially outward from the bracket main body (30) so as to be mounted to a mounting target member, and an expanded portion (37) expanding radially from the mounting leg portion (31) toward a circumferential edge portion of the bracket main body (30).Type: GrantFiled: July 24, 2014Date of Patent: November 22, 2016Assignee: Mitsubishi Electric CorporationInventors: Kentaro Kozuka, Kenji Tsuruhara
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Publication number: 20160237276Abstract: To provide a polycarbonate resin composition excellent in the surface hardness, the heat resistance, the moldability and the flame retardancy. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the following requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO 15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184; (ii) the glass transition point Tg(a) of the polycarbonate resin (a) and the glass transition point Tg(b) of the polycarbonate resin (b) satisfy the relation of the following (Formula 1): Tg(b)?45° C.<Tg(a)<Tg(b)?10° C.??(Formula 1) and (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO 15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184.Type: ApplicationFiled: April 28, 2016Publication date: August 18, 2016Applicants: Mitsubishi Chemical Corporation, Mitsubishi Engineering-Plastics CorporationInventors: Tatsuya HITOMI, Ryouhei NISHIHARA, Masanori YAMAMOTO, Michio NAKATA, Tetsurou NOBUYASU, Ryuuji UCHIMURA, Kazuyuki TAKAHASHI, Kenji TSURUHARA, Tomonari YOKOYAMA
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Publication number: 20150236571Abstract: Provided is an AC generator for a vehicle, which is improved in heat-radiation performance and vibration resistance with a simple configuration. The AC generator for a vehicle includes a rectifier which is mounted to a rear bracket (2) and is electrically connected to a stator, for rectifying an alternating current generated in the stator into a direct current. The rear bracket (2) includes a bracket main body (30) having intake windows (32) and exhaust windows (34) partitioned by ribs (33), and a bearing housing portion (41) for housing a bearing therein, a mounting leg portion (31) extending radially outward from the bracket main body (30) so as to be mounted to a mounting target member, and an expanded portion (37) expanding radially from the mounting leg portion (31) toward a circumferential edge portion of the bracket main body (30).Type: ApplicationFiled: July 24, 2014Publication date: August 20, 2015Applicant: Mitsubishi Electric CorporationInventors: Kentaro KOZUKA, Kenji TSURUHARA
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Publication number: 20140018498Abstract: To provide a polycarbonate resin composition excellent in the surface hardness, the heat resistance, the moldability and the flame retardancy. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the following requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO 15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184; (ii) the glass transition point Tg(a) of the polycarbonate resin (a) and the glass transition point Tg(b) of the polycarbonate resin (b) satisfy the relation of the following (Formula 1): Tg(b)?45° C.<Tg(a)<Tg(b)?10° C.??(Formula 1) (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO 15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184.Type: ApplicationFiled: September 12, 2013Publication date: January 16, 2014Applicants: Mitsubishi Engineering-Plastics Corporation, Mitsubishi Chemical CorporationInventors: Tatsuya HITOMI, Ryouhei NISHIHARA, Masanori YAMAMOTO, Michio NAKATA, Tetsurou NOBUYASU, Ryuuji UCHIMURA, Kazuyuki TAKAHASHI, Kenji TSURUHARA, Tomonari YOKOYAMA
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Patent number: 8569406Abstract: To provide a polycarbonate resin composition having improved flame retardancy and moldability. A polycarbonate resin having a ratio of the melt viscosity ?10 measured at 300° C. at a shear rate of 10 sec?1 to the melt viscosity ?1000 measured at 300° C. at a shear rate of 1000 sec?1 (?10/?1000) of at least 3 and at most 8, a branch parameter G=[?]/[?]lin of at least 0.80 and at most 0.94, and a pencil hardness of at least HB.Type: GrantFiled: October 1, 2012Date of Patent: October 29, 2013Assignees: Mitsubishi Chemical Corporation, Mitsubishi Engineering Plastics CorporationInventors: Ryuuji Uchimura, Kazuyuki Takahashi, Kenji Tsuruhara, Tomonari Yokoyama
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Publication number: 20130030112Abstract: To provide a polycarbonate resin composition excellent in the surface hardness, the heat resistance, the moldability and the flame retardancy. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the following requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO 15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184; (ii) the glass transition point Tg(a) of the polycarbonate resin (a) and the glass transition point Tg(b) of the polycarbonate resin (b) satisfy the relation of the following (Formula 1): Tg(b)?45° C.<Tg(a)<Tg(b)?10° C.??(Formula 1) and (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO 15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184.Type: ApplicationFiled: October 1, 2012Publication date: January 31, 2013Inventors: Tatsuya HITOMI, Ryouhei NISHIHARA, Masanori YAMAMOTO, Michio NAKATA, Tetsurou NOBUYASU, Ryuuji UCHIMURA, Kazuyuki TAKAHASHI, Kenji TSURUHARA, Tomonari YOKOYAMA
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Publication number: 20130030113Abstract: To provide a polycarbonate resin composition excellent in surface hardness and impact strength. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO15184; (ii) the weight ratio of the polycarbonate resin (a) to the polycarbonate resin (b) in the polycarbonate resin is from 1:99 to 45:55; (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO15184; and (iv) the Charpy impact strength of the polycarbonate resin composition is higher than the Charpy impact strength of the polycarbonate resin (a).Type: ApplicationFiled: October 1, 2012Publication date: January 31, 2013Inventors: Tatsuya HITOMI, Ryouhei Nishihara, Masanori Yamamoto, Michio Nakata, Tetsurou Nobuyasu, Ryuuji Uchimura, Kazuyuki Takahashi, Kenji Tsuruhara, Tomonari Yokohama
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Publication number: 20130030094Abstract: To provide a polycarbonate resin composition having improved flame retardancy and moldability. A polycarbonate resin having a ratio of the melt viscosity ?10 measured at 300° C. at a shear rate of 10 sec?1 to the melt viscosity ?1000 measured at 300° C. at a shear rate of 1000 sec?1 (?10/?1000) of at least 3 and at most 8, a branch parameter G=[?]/[?]lin of at least 0.80 and at most 0.94, and a pencil hardness of at least HB.Type: ApplicationFiled: October 1, 2012Publication date: January 31, 2013Inventors: Ryuuji Uchimura, Kazuyuki Takahashi, Kenji Tsuruhara, Tomonari Yokoyama
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Publication number: 20110021739Abstract: The object of the present invention is to provide a polycarbonate resin having an extremely narrow molecular weight distribution, good flowability when melting, and particularly extremely good flowability when melting that does not depend on shear rate. The present invention relates to a polycarbonate resin, characterized in that a value obtained by dividing difference between a logarithmic value log MV9.12 of a melt viscosity (Pa·s) measured at shear rate of 9.12 sec?1 and a logarithmic value log MV1824 of a melt viscosity (Pa·s) measured at shear rate of 1824 sec?, with a capillary rheometer having a die diameter of 1 mm? and an effective length of 30 mmL, by a viscosity average molecular weight Mv calculated by the following equations, viscosity difference/molecular weight ratio, is 2.0×10?5 or less. ?sp/C=[?]×(1+0.28?sp) [?]=1.23×10?4×Mv0.83 (In the above equations, ?sp is a specific viscosity measured at 20° C.Type: ApplicationFiled: April 18, 2007Publication date: January 27, 2011Applicant: Mitsubishi Chemical CorporationInventors: Masaaki Miyamoto, Kenji Tsuruhara, Yoshitaka Shiraishi, Ryuuji Uchimura
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Patent number: 6369485Abstract: A rotor structure comprising magnets for suppressing the leakage of a magnetic flux between the side faces of the adjacent claw-like magnetic poles and metal holding members each of which covers the magnets together with the claw-like magnetic pole and radiates heat transmitted to the claw-like magnetic pole at the time of power generation. Therefore, the quantity of heat radiated to the peripheral portions of the magnets is increased and the coolability of the magnets can be greatly improved.Type: GrantFiled: January 4, 2000Date of Patent: April 9, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Atsushi Oohashi, Yoshihito Asao, Kenji Tsuruhara, Kyoko Higashino
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Patent number: 6333582Abstract: A rotor has plural reinforcing bodies each approximately formed in a U-shape having wing portions arranged in both side portions of an attaching portion of a flat plate shape, and disposed such that the attaching portion faces to each of inner circumferential wall surfaces of claw-shaped magnetic poles and the wing portions are located on both sides of the claw-shaped magnetic poles in the circumferential direction; and plural magnets each fixedly attached to both wing portions of each of the reinforcing bodies and disposed on both sides of the claw-shaped magnetic poles in the circumferential direction, for reducing leaked magnetic flux between the claw-shaped magnetic poles adjacent to each other, wherein a multidegree of freedom vibrating system composed of the claw-shaped magnetic poles and the reinforcing bodies fixedly attaching the magnets thereto is constructed by attaching each of the reinforcing bodies in a state in which at least one portion of the attaching portion is fixedly attached to the innerType: GrantFiled: June 2, 2000Date of Patent: December 25, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yoshihito Asao, Kenji Tsuruhara, Kyoko Higashino, Katsumi Adachi
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Patent number: 6316580Abstract: A polycarbonate resin obtained by reacting a carbonate raw material with a dihydroxy compound, having: a ratio (Mw/Mn) of a weight-average molecular weight (Mw) to a number-average molecular weight (Mn) of not more than 2.2:1, calculated as polystyrene, when measured by gel permeation chromatography; and a ratio (Mv/Mn′) of a viscosity-average molecular weight (Mv) calculated according to the following formulae, to a number-average molecular weight (Mn′) calculated based on the number of molecular ends, of not more than 1.40:1. &eegr;sp/C=[&eegr;]×(1+0.28&eegr;sp) [&eegr;]=1.23×10−4×(Mv)0.83 wherein &eegr;sp is a specific viscosity of the polycarbonate resin when measured with respect to a methylene chloride solution thereof at 20° C.; and C is a concentration of the methylene chloride solution, in the present case, the methylene chloride solution having a polycarbonate resin concentration of 0.6 g/dl is used.Type: GrantFiled: December 29, 2000Date of Patent: November 13, 2001Assignee: Mitsubishi Chemical CorporationInventors: Masaaki Miyamoto, Kenji Tsuruhara
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Patent number: 6218747Abstract: A car AC generator which is capable of simplifying the structures of cooling function portions with a cooling liquid and cooling air. At least one of a front bracket and a rear bracket has a ring-shaped cooling recessed portion in a peripheral portion, the front bracket and the rear bracket are combined together to form a part chamber for storing power generation parts consisting of a generator shaft, a stator and a rotor, the cooling recessed portion forms a ring-shaped peripheral cooling chamber, a cooling cover is placed upon a rear portion of the rear bracket to form a rear cooling chamber with the rear bracket, the rear bracket has a communication hole for connecting the peripheral cooling chamber to the rear cooling chamber, at least one of the front bracket and the rear bracket has air holes communicating with the part chamber and the outside, and a power generation part has a fan.Type: GrantFiled: September 1, 1999Date of Patent: April 17, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Kenji Tsuruhara
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Patent number: 6201335Abstract: A rotor structure comprising a rotor coil for generating a magnetic flux, a pole core which covers the rotor coil and consists of a first pole core body and a second pole core body, each having a plurality of claw-like magnetic poles which are mated with each other, magnets provided on both sides of each of the claw-like magnetic pole for suppressing the leakage of a magnetic flux between adjacent claw-like magnetic poles, and reinforcements for holding the magnets in such a manner that the magnets are inclined so that the interval between the magnets becomes larger on the outer side than on the inner side. This rotor structure can reduce centrifugal force applied to the magnets.Type: GrantFiled: March 20, 2000Date of Patent: March 13, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kyoko Higashino, Yoshihito Asao, Kenji Tsuruhara, Atsushi Oohashi
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Patent number: 6169344Abstract: An alternating current generator has a cooling function for a vehicle and includes a front bracket and a rear bracket with annular recessed portions that form a peripheral cooling chamber. A cooling cover is provided on the rear bracket. The cooling cover and the rear bracket form a rear cooling chamber. The peripheral cooling chamber and the rear cooling chamber are connected together through a connecting hole provided in the rear bracket. The front and rear brackets also form a parts housing chamber for receiving electric parts. The parts housing chamber is isolated from the peripheral and rear cooling chambers so as not to accommodate the fluid.Type: GrantFiled: September 1, 1999Date of Patent: January 2, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Kenji Tsuruhara
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Patent number: 6160332Abstract: In order to simplify the structure of a cooling function section utilizing a cooling fluid, a front bracket and a bowl-shaped rear bracket having a flange portion projecting outward from its opening portion are joined in a format resembling hands closed in prayer to form a parts housing chamber, and an airtight cooling chamber utilizing the cooling fluid is formed between the rear bracket and the cooling cover by placing an opening portion of the cooling cover and the flange portion of the rear bracket one upon the other.Type: GrantFiled: July 8, 1999Date of Patent: December 12, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Kenji Tsuruhara