Patents by Inventor Tomofumi Maekawa

Tomofumi Maekawa 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: 20100200983
    Abstract: An electronic component has a board, a semiconductor element mounted on an upper surface of the board, a ground electrode formed in a region surrounding the semiconductor element on the upper surface of the board, a conductive cap that overlaps the board such that the semiconductor element is covered therewith, and a conductive joining member that joins a whole periphery of a lower surface of the conductive cap to the ground electrode. The conductive cap includes a pressing portion on the lower surface thereof The lower surface of the conductive cap and the ground electrode are joined by the conductive joining member on an outer peripheral side of the pressing portion.
    Type: Application
    Filed: February 16, 2009
    Publication date: August 12, 2010
    Applicant: OMRON CORPORATION
    Inventors: Kazuyuki Ono, Yoshio Tanaka, Kiyoshi Nakajima, Naoto Kuratani, Tomofumi Maekawa
  • Patent number: 7671142
    Abstract: A thermoplastic resin composition which comprises (A) 1 to 99 parts by weight of polytrimethylene terephthalate and (B) 99 to 1 part by weight of a polycarbonate, wherein the ingredient (A) crystallization enthalpy, ?Hcc, which is obtained when the thermoplastic resin composition is heated from 0 ° C. at a rate of 20° C./min is 0 to 15 J/g.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: March 2, 2010
    Assignee: Asahi Kasei Chemicals Corporation
    Inventor: Tomofumi Maekawa
  • Publication number: 20070142571
    Abstract: According to the present invention, a thermoplastic resin composition having not only extremely excellent mechanical properties and moldability but also excellent appearance, impact resistance, heat resistance, and rigidity when heated can be provided. The present invention is expected to greatly contribute to meeting the requirements for improved high performance and high functionality demanded in various applications, such as automobile exterior parts or outer plate parts, automobile interior parts, automobile underhood parts, two-wheeled vehicle parts, parts used in home furniture, items used in office automation equipments, items used in electricals and electronics, and items used in industrial applications.
    Type: Application
    Filed: December 9, 2004
    Publication date: June 21, 2007
    Inventor: Tomofumi Maekawa
  • Patent number: 7186764
    Abstract: A reinforced polytrimethylene terephthalate resin composition comprising a polytrimethylene terephthalate and an inorganic filler, wherein an amount of the inorganic filler falls within the range from 5 to 70% by weight based on a total weight of the resin composition, an amount of a grafting polytrimethylene terephthalate layer provided on a surface of the inorganic filler falls within the range from 0.1 to 2 parts by weight based on 100 parts by weight of the inorganic filler, and a melt viscosity measured at a resin temperature of 260° C. and a shear rate of 1 rad/sec of a resin component in the resin composition is not more than 600 Pa·s.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: March 6, 2007
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventor: Tomofumi Maekawa
  • Patent number: 7094819
    Abstract: A flame retardant polytrimethylene terephthalate resin composition, comprising: 30 to 99 parts by weight of (A) a polytrimethylene terephthalate resin, and 1 to 70 parts by weight of at least one flame retardant selected from the group consisting of (B-1) phosphorus-containing flame retardant and (B-2) nitrogen-containing flame retardant, is disclosed. The composition has superior mechanical characteristics, chemical resistance, electrical characteristics, weatherability, heat aging resistance and hydrolysis resistance, and has superior moldability, good appearance with less warpage deformation when molded, and furthermore has superior flame retardance and does not generate highly corrosive hydrogen halide gas upon combustion.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: August 22, 2006
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Junko Kakegawa, Tomofumi Maekawa, Hideki Nakamura
  • Patent number: 6936682
    Abstract: A polyamide characterized in that the polyamide is obtained by thermal polycondensation of (a) dicarboxylic acid components comprising 10 to 80% by mole in total carboxylic acid components of 1,4-cyclohexanedicarboxylic acid having a trans/cis molar ratio of 50/50 to 97/3 and (b) an aliphatic diamine component is disclosed. The alicyclic polyamide having 1,4-cyclohexanedicarboxylic acid in a backbone thereof as a dicarboxylic acid unit, which is suitable as materials for various uses such as automotive parts, electric/electronics parts, industrial materials, engineering materials and daily household goods, and superior in heat resistance, low water absorption, light resistance, moldability and light weight, as well as superior in toughness, chemical resistance and appearance, and molded articles thereof.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: August 30, 2005
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Masaaki Aramaki, Tomofumi Maekawa
  • Publication number: 20040198878
    Abstract: A flame retardant polytrimethylene terephthalate resin composition, comprising:
    Type: Application
    Filed: February 6, 2004
    Publication date: October 7, 2004
    Inventors: Junko Kakegawa, Tomofumi Maekawa, Hideki Nakamura
  • Patent number: 6794463
    Abstract: Block copolymer comprising at least two kinds of polymer components each having a different structural unit in the polymer selected from polyamide, polyester, polycarbonate and polyarylate. The present block copolymer has a distinguished moldability and can be produced even from rework products or recycle products in a simple and economical manner.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: September 21, 2004
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Masaaki Aramaki, Takashi Saitou, Tomofumi Maekawa
  • Publication number: 20040147635
    Abstract: A reinforced polytrimethylene terephthalate resin composition comprising a polytrimethylene terephthalate and an inorganic filler, wherein an amount of the inorganic filler falls within the range from 5 to 70% by weight based on a total weight of the resin composition, an amount of a grafting polytrimethylene terephthalate layer provided on a surface of the inorganic filler falls within the range from 0.1 to 2 parts by weight based on 100 parts by weight of the inorganic filler, and a melt viscosity measured at a resin temperature of 260° C. and a shear rate of 1 rad/sec of a resin component in the resin composition is not more than 600 Pa.s.
    Type: Application
    Filed: October 24, 2003
    Publication date: July 29, 2004
    Inventor: Tomofumi Maekawa
  • Publication number: 20040049006
    Abstract: A polyamide characterized in that the polyamide is obtained by thermal polycondensation of (a) dicarboxylic acid components comprising 10 to 80% by mole in total carboxylic acid components of 1,4-cyclohexanedicarboxylic acid having a trans/cis molar ratio of 50/50 to 97/3 and (b) an aliphatic diamine component is disclosed. The alicyclic polyamide having 1,4-cyclohexanedicarboxylic acid in a backbone thereof as a dicarboxylic acid unit, which is suitable as materials for various uses such as automotive parts, electric/electronics parts, industrial materials, engineering materials and daily household goods, and superior in heat resistance, low water absorption, light resistance, moldability and light weight, as well as superior in toughness, chemical resistance and appearance, and molded articles thereof.
    Type: Application
    Filed: June 10, 2003
    Publication date: March 11, 2004
    Inventors: Masaaki Aramaki, Tomofumi Maekawa
  • Publication number: 20030171494
    Abstract: Block copolymer comprising at least two kinds of polymer components each having a different structural unit in the polymer selected from polyamide, polyester, polycarbonate and polyarylate. The present block copolymer has a distinguished moldability and can be produced even from rework products or recycle products in a simple and economical manner.
    Type: Application
    Filed: September 27, 2002
    Publication date: September 11, 2003
    Inventors: Masaaki Aramaki, Takashi Saitou, Tomofumi Maekawa