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).

  • Publication number: 20080299355
    Abstract: 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: Application
    Filed: July 28, 2008
    Publication date: December 4, 2008
    Inventor: Yoshihiro Kurasawa
  • Patent number: 7405253
    Abstract: 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: Grant
    Filed: December 16, 2004
    Date of Patent: July 29, 2008
    Assignee: Mitsubishi Engineering-Plastics Corporation
    Inventor: Yoshihiro Kurasawa
  • Publication number: 20050182166
    Abstract: 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: Application
    Filed: December 16, 2004
    Publication date: August 18, 2005
    Inventor: Yoshihiro Kurasawa
  • Publication number: 20040034140
    Abstract: 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: Application
    Filed: June 17, 2003
    Publication date: February 19, 2004
    Applicant: Mitsubishi Engineering-Plastics Corp.
    Inventors: Yoshihiro Kurasawa, Naoto Obayashi, Kiyoji Takagi, Shigeru Muramatsu
  • Patent number: 6610442
    Abstract: 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: Grant
    Filed: June 4, 2001
    Date of Patent: August 26, 2003
    Assignee: Mitsubishi Engineering-Plastics Corporation
    Inventors: Yoshihiro Kurasawa, Naoto Obayashi
  • Patent number: 6608133
    Abstract: 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: Grant
    Filed: August 7, 2001
    Date of Patent: August 19, 2003
    Assignee: Mitsubishi Engineering-Plastics Corp.
    Inventors: Yoshihiro Kurasawa, Naoto Obayashi, Kiyoji Takagi, Shigeru Muramatsu
  • Patent number: 6602637
    Abstract: 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: Grant
    Filed: November 15, 2000
    Date of Patent: August 5, 2003
    Assignee: Mitsubishi Engineering-Plastics Corporation
    Inventors: Yoshihiro Kurasawa, Naoto Obayashi
  • Patent number: 6562887
    Abstract: 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: Grant
    Filed: February 24, 2000
    Date of Patent: May 13, 2003
    Assignee: Mitsubishi Engineering-Plastics Corporation
    Inventors: Yoshihiro Kurasawa, Naoto Obayashi, Takashi Miyajima
  • Publication number: 20030018134
    Abstract: The present invention relates to a molding material for OA machine parts comprising a resin composition comprising:
    Type: Application
    Filed: May 24, 2000
    Publication date: January 23, 2003
    Inventors: Yoshihiro Kurasawa, Akihiro Kokubo, Koji Nishida
  • Patent number: 6495621
    Abstract: 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: Grant
    Filed: May 24, 2000
    Date of Patent: December 17, 2002
    Assignee: Mitsubishi Engineering-Plastics Corporation
    Inventors: Yoshihiro Kurasawa, Akihiro Kokubo, Koji Nishida
  • Publication number: 20020040090
    Abstract: 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: Application
    Filed: August 7, 2001
    Publication date: April 4, 2002
    Inventors: Yoshihiro Kurasawa, Naoto Obayashi, Kiyoji Takagi, Shigeru Muramatsu
  • Publication number: 20020035206
    Abstract: 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: Application
    Filed: June 4, 2001
    Publication date: March 21, 2002
    Inventors: Yoshihiro Kurasawa, Naoto Obayashi
  • Patent number: 6040084
    Abstract: 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: Grant
    Filed: February 27, 1998
    Date of Patent: March 21, 2000
    Assignee: Mitsubishi Engineering-Plastics Corporation
    Inventors: Yoshihiro Kurasawa, Koji Nishida
  • Patent number: 5747575
    Abstract: 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: Grant
    Filed: November 1, 1996
    Date of Patent: May 5, 1998
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Koji Nishida, Yoshihiro Kurasawa, Kiyoji Takagi, Hironari Sano
  • Patent number: 5648424
    Abstract: 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: Grant
    Filed: November 7, 1995
    Date of Patent: July 15, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Chiyo Miwa, Hironari Sano, Koji Nishida, Yoshihiro Kurasawa
  • Patent number: 5310776
    Abstract: 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: Grant
    Filed: April 30, 1993
    Date of Patent: May 10, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kiyoji Takagi, Yoshihiro Kurasawa, Koji Nishida, Shigekazu Ohi, Kenji Mori, Tsukasa Sato, Tosio Itou
  • Patent number: 5159008
    Abstract: 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: Grant
    Filed: April 26, 1991
    Date of Patent: October 27, 1992
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Koji Nishida, Yoshihiro Kurasawa, Suetsugu Kakiichi, Shohji Yoshino
  • Patent number: 4947029
    Abstract: 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: Grant
    Filed: September 19, 1989
    Date of Patent: August 7, 1990
    Assignees: Canon Kabushiki Kaisha, Canon Denshi Kabushiki Kaisha
    Inventors: Hideo Kurihara, Kenichi Suzuki, Kazuo Minoura, Keiji Ohkoda, Hitoshi Kurihara, Yoshihiro Kurasawa