Patents by Inventor Yoshihiro Kurasawa
Yoshihiro Kurasawa 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: 20080299355Abstract: The present invention relates to a reinforced thermoplastic resin composition comprising at least an amorphous thermoplastic resin (A), a flame retardant (B), fibrous calcium silicate (C) and an inorganic material (D) comprising talc and/or mica, the content of flame retardant (B) being 0.01 to 30 parts by weight based on 100 parts by weight of the amorphous thermoplastic resin (A); the content of fibrous calcium silicate (C) in said composition being 3 to 30% by weight, and the content of the inorganic material (D) comprising talc, mica or mixture thereof in said composition being 3 to 30% by weight.Type: ApplicationFiled: July 28, 2008Publication date: December 4, 2008Inventor: Yoshihiro Kurasawa
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Patent number: 7405253Abstract: The present invention relates to a reinforced thermoplastic resin composition comprising at least an amorphous thermoplastic resin (A), a flame retardant (B), fibrous calcium silicate (C) and an inorganic material (D) comprising talc and/or mica, the content of flame retardant (B) being 0.01 to 30 parts by weight based on 100 parts by weight of the amorphous thermoplastic resin (A); the content of fibrous calcium silicate (C) in said composition being 3 to 30% by weight, and the content of the inorganic material (D) comprising talc, mica or mixture thereof in said composition being 3 to 30% by weight.Type: GrantFiled: December 16, 2004Date of Patent: July 29, 2008Assignee: Mitsubishi Engineering-Plastics CorporationInventor: Yoshihiro Kurasawa
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Publication number: 20050182166Abstract: The present invention relates to a reinforced thermoplastic resin composition comprising at least an amorphous thermoplastic resin (A), a flame retardant (B), fibrous calcium silicate (C) and an inorganic material (D) comprising talc and/or mica, the content of flame retardant (B) being 0.01 to 30 parts by weight based on 100 parts by weight of the amorphous thermoplastic resin (A); the content of fibrous calcium silicate (C) in said composition being 3 to 30% by weight, and the content of the inorganic material (D) comprising talc, mica or mixture thereof in said composition being 3 to 30% by weight.Type: ApplicationFiled: December 16, 2004Publication date: August 18, 2005Inventor: Yoshihiro Kurasawa
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Publication number: 20040034140Abstract: The present invention relates to a thermoplastic resin composition comprising a thermoplastic resin and hollow carbon fibrils dispersed in the thermoplastic resin, the hollow carbon fibrils being present in an amount of 0.1 to 20% by weight based on the total weight of the composition, comprising independent fibrils and agglomerated fibrils, and having such a dispersing condition, when represented by indices based on the measurement of transmission electron microphotograph, that the ratio of the independent fibrils to the agglomerated fibrils lies within the range of 8/92 to 40/60 and the independent fibrils have an average length of 20 to 200 nm.Type: ApplicationFiled: June 17, 2003Publication date: February 19, 2004Applicant: Mitsubishi Engineering-Plastics Corp.Inventors: Yoshihiro Kurasawa, Naoto Obayashi, Kiyoji Takagi, Shigeru Muramatsu
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Patent number: 6610442Abstract: The present invention relates to a resin composition comprising 5 to 60 parts by weight of a polyphenylene ether resin and 40 to 95 parts by weight of a crystalline polypropylene resin, and further containing a hydrogenation product of an aromatic vinyl compound-conjugated diene copolymer in an amount of 1 to 30 parts by weight based on 100 parts by weight of said polyphenylene ether resin and crystalline polypropylene resin combined, said crystalline polypropylene resin forming a continuous phase while said polyphenylene ether resin forming a disperse phase, the ratio of the weighted average inter-particle-wall distance (Lw) to the added average inter-particle-wall distance (Ln) of said disperse phase, Lw/Ln, being 1.0 to 3.0.Type: GrantFiled: June 4, 2001Date of Patent: August 26, 2003Assignee: Mitsubishi Engineering-Plastics CorporationInventors: Yoshihiro Kurasawa, Naoto Obayashi
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Patent number: 6608133Abstract: The present invention relates to a thermoplastic resin composition comprising a thermoplastic resin and hollow carbon fibrils dispersed in the thermoplastic resin, the hollow carbon fibrils being present in an amount of 0.1 to 20% by weight based on the total weight of the composition, comprising independent fibrils and agglomerated fibrils, and having such a dispersing condition, when represented by indices based on the measurement of transmission electron microphotograph, that the ratio of the independent fibrils to the agglomerated fibrils lies within the range of 8/92 to 40/60 and the independent fibrils have an average length of 20 to 200 nm.Type: GrantFiled: August 7, 2001Date of Patent: August 19, 2003Assignee: Mitsubishi Engineering-Plastics Corp.Inventors: Yoshihiro Kurasawa, Naoto Obayashi, Kiyoji Takagi, Shigeru Muramatsu
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Patent number: 6602637Abstract: The present invention relates to a secondary battery case being molded by a thermoplastic resin composition comprising: (A) a polyphenylene ether-based resin, (B) a crystalline polypropylene resin which is a homopolymer or a copolymer of polypropylene, and (C) a hydrogenated block copolymer comprising an aromatic vinyl compound polymer block and a conjugated diene compound polymer block, the (A)/(B) ratio by weight being 7/93 to 70/30, the amount of (C) being 2 to 40 parts by weight based on 100 parts by weight of (A) and (B) combined, the melt flow rate of said crystalline polypropylene resin (B) being 0.1 to 10 g/10 min as measured according to JIS K-7210 at 230° C. and 21.17 N, the density of the propylene polymer moiety in said crystalline polypropylene resin being not less than 0.906 g/cm3.Type: GrantFiled: November 15, 2000Date of Patent: August 5, 2003Assignee: Mitsubishi Engineering-Plastics CorporationInventors: Yoshihiro Kurasawa, Naoto Obayashi
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Patent number: 6562887Abstract: The present invention relates to a polycarbonate resin composition comprising 100 parts by weight of a polycarbonate resin, 0.05 to 5 parts by weight of a silicone oil (BH) having a dynamic viscosity of not less than 10,000 mm2/s at 25° C., and 0.5 to 25 parts by weight of a composite rubber (C) having such structure that the polyorganosiloxane rubber component and the polyalkyl (meth)acrylate rubber component are interlocked to form a unitary composite.Type: GrantFiled: February 24, 2000Date of Patent: May 13, 2003Assignee: Mitsubishi Engineering-Plastics CorporationInventors: Yoshihiro Kurasawa, Naoto Obayashi, Takashi Miyajima
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Publication number: 20030018134Abstract: The present invention relates to a molding material for OA machine parts comprising a resin composition comprising:Type: ApplicationFiled: May 24, 2000Publication date: January 23, 2003Inventors: Yoshihiro Kurasawa, Akihiro Kokubo, Koji Nishida
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Patent number: 6495621Abstract: The present invention relates to a molding material for OA machine parts, wherein such material comprises a resin combination of 60 to 98 parts by weight of a polyphenylene ether-based resin, 2 to 40 parts by weight of a thermoplastic elastomer, and 1 to 50 parts by weight of a flame retardant, such that the resin composition has a bending modulus of not less than 1500 MPa as measured at 23° C. according to ASTM D790, a damping ratio of not less than 1.0% at 23° C., and a thermal deformation temperature of not less than 100° C. as measured according to ASTM D648 under 18.6 kg/cm2 load, and wherein the product of the bending modulus and the damping ratio is not less than 10,000 MPa*%.Type: GrantFiled: May 24, 2000Date of Patent: December 17, 2002Assignee: Mitsubishi Engineering-Plastics CorporationInventors: Yoshihiro Kurasawa, Akihiro Kokubo, Koji Nishida
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Publication number: 20020040090Abstract: The present invention relates to a thermoplastic resin composition comprising a thermoplastic resin and hollow carbon fibrils dispersed in the thermoplastic resin, the hollow carbon fibrils being present in an amount of 0.1 to 20% by weight based on the total weight of the composition, comprising independent fibrils and agglomerated fibrils, and having such a dispersing condition, when represented by indices based on the measurement of transmission electron microphotograph, that the ratio of the independent fibrils to the agglomerated fibrils lies within the range of 8/92 to 40/60 and the independent fibrils have an average length of 20 to 200 nm.Type: ApplicationFiled: August 7, 2001Publication date: April 4, 2002Inventors: Yoshihiro Kurasawa, Naoto Obayashi, Kiyoji Takagi, Shigeru Muramatsu
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Publication number: 20020035206Abstract: The present invention relates to a resin composition comprising 5 to 60 parts by weight of a polyphenylene ether resin and 40 to 95 parts by weight of a crystalline polypropylene resin, and further containing a hydrogenation product of an aromatic vinyl compound-conjugated diene copolymer in an amount of 1 to 30 parts by weight based on 100 parts by weight of said polyphenylene ether resin and crystalline polypropylene resin combined, said crystalline polypropylene resin forming a continuous phase while said polyphenylene ether resin forming a disperse phase, the ratio of the weighted average inter-particle-wall distance (Lw) to the added average inter-particle-wall distance (Ln) of said disperse phase, Lw/Ln, being 1.0 to 3.0.Type: ApplicationFiled: June 4, 2001Publication date: March 21, 2002Inventors: Yoshihiro Kurasawa, Naoto Obayashi
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Patent number: 6040084Abstract: The present invention relates to a closed secondary battery container comprising:at least two parts comprising a resin composition comprising (a) 100 parts by weight of a polyphenylene ether resin and (b) 1 to 30 parts by weight of a phosphoric ester compound represented by the following formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently a C.sub.1 -C.sub.10 alkyl group, a C.sub.5 -C.sub.15 cycloakyl group, a C.sub.6 -C.sub.15 aryl group, a C.sub.1 -C.sub.10 alkyl-substituted C.sub.6 -C.sub.15 aryl group, a halogen-substituted C.sub.6 -C.sub.15 aryl group, a C.sub.6 -C.sub.15 aryl-substituted C.sub.1 -C.sub.Type: GrantFiled: February 27, 1998Date of Patent: March 21, 2000Assignee: Mitsubishi Engineering-Plastics CorporationInventors: Yoshihiro Kurasawa, Koji Nishida
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Patent number: 5747575Abstract: There is provided a crystalline thermoplastic resin composition comprising (a) 100 parts by weight of a crystalline thermoplastic resin and (b) 0.01 to 11 parts by weight of a laminar structure of silicate, said laminar structure of silicate being present in the form of crystal nuclei dispersed at a molecular level in said resin, and having an aspect ratio of at least 20 as represented by a length-to-breadth ratio of said crystal nuclei.Type: GrantFiled: November 1, 1996Date of Patent: May 5, 1998Assignee: Mitsubishi Chemical CorporationInventors: Koji Nishida, Yoshihiro Kurasawa, Kiyoji Takagi, Hironari Sano
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Patent number: 5648424Abstract: Disclosed is a molded product of a thermoplastic resin composition which comprises:(a) a non-crystalline thermoplastic resin,(b) a crystalline thermoplastic resin and(c) an inorganic filler, if necessary,wherein a portion in which Component (a) takes a structure forming a matrix and a portion in which Component (b) takes a structure forming a matrix coexist.Type: GrantFiled: November 7, 1995Date of Patent: July 15, 1997Assignee: Mitsubishi Chemical CorporationInventors: Chiyo Miwa, Hironari Sano, Koji Nishida, Yoshihiro Kurasawa
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Patent number: 5310776Abstract: There is disclosed a process for preparing a thermoplastic resin composition which comprises melting and kneading(A) 100 parts by weight of a resin comprising 100% by weight in total of:(a) 5 to 95% by weight of a non-crystalline thermoplastic resin,(b) 95 to 5% by weight of a crystalline thermoplastic resin,(c) 0 to 50% by weight of a compatibilizer and(d) 0 to 40% by weight of an impact modifierand(B) 1.0 part by weight or more of an organic solvent in a kneader equipped with vent ports each having a vacuum device while maintaining each vent port at reduced pressure to make an organic solvent content in a final composition less than 1.0% by weight.Type: GrantFiled: April 30, 1993Date of Patent: May 10, 1994Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Kiyoji Takagi, Yoshihiro Kurasawa, Koji Nishida, Shigekazu Ohi, Kenji Mori, Tsukasa Sato, Tosio Itou
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Patent number: 5159008Abstract: A thermoplastic resin composition comprising:30 to 60 parts by weight of a polyphenylene ether which is a mixture of a high viscosity polyphenylene ether (A) with an inherent viscosity (.eta.A) of 0.4 dl/g to 1.0 dl/g and a low viscosity polyphenylene ether (B) with an inherent viscosity (.eta.B) of 0.25 dl/g to less than 0.4 dl/g at a weight ratio of (A)/(B) of 10/90 to 90/10 based on 100 parts by weight of the total of (A), (B) and (C),40 to 70 parts by weight of a polyamide (C) with a relative viscosity (.eta.) of 1.0 to 8.0 based on 100 parts by weight of the total of (A), (B) and (C),0.Type: GrantFiled: April 26, 1991Date of Patent: October 27, 1992Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Koji Nishida, Yoshihiro Kurasawa, Suetsugu Kakiichi, Shohji Yoshino
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Patent number: 4947029Abstract: A cleaning device comprises a cleaning member having a cleaning surface adapted to abut against a recording surface of an information recording medium, apparatus for holding the cleaning member, apparatus for moving the cleaning surface of the cleaning member, and apparatus for moving the hold means relative to the recording surface.Type: GrantFiled: September 19, 1989Date of Patent: August 7, 1990Assignees: Canon Kabushiki Kaisha, Canon Denshi Kabushiki KaishaInventors: Hideo Kurihara, Kenichi Suzuki, Kazuo Minoura, Keiji Ohkoda, Hitoshi Kurihara, Yoshihiro Kurasawa