Patents by Inventor Masashi Kurokawa

Masashi Kurokawa 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).

  • Patent number: 9334365
    Abstract: Provided is a xylylenesebacamide resin molding which is excellent in mechanical strength such as elastic modulus and avoids the problem of mechanical strength loss during long-term use. This is a molding of a polyamide resin or a polyamide resin composition containing the polyamide resin, wherein 70 mol % or more of the diamine structural unit is derived from xylylenediamine (A) and 50 mol % or more of the dicarboxylic acid structural unit is derived from sebacic acid (B), and the molding has a crystallinity index of 0 to 50% and a moisture content of 0.1 to 2% by mass.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: May 10, 2016
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Masashi Kurokawa, Takahiro Takano
  • Patent number: 9163117
    Abstract: Provided is a polyamide resin having excellent color tone and elastic modulus, excellent gas barrier properties and low water absorption. The polyamide resin comprises a diamine structural unit and a dicarboxylic acid structural unit, wherein 70 mol % or more of the diamine structural unit is derived from xylylenediamine (A-1) and/or bis(aminomethyl)cyclohexane (A-2) and 50 mol % or more of the dicarboxylic acid structural unit is derived from sebacic acid (B), characterized in that it has a sulfur atom concentration of 1 to 200 ppm by mass.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: October 20, 2015
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Masashi Kurokawa, Shigeyuki Hirose, Nobuhiko Matsumoto
  • Patent number: 8895121
    Abstract: Disclosed is a polyamide resin composition having excellent gas barrier properties and heat aging resistance, which contains (A) a polyamide composed of a diamine unit containing a 1,3-bis(aminomethyl)cyclohexane unit and a dicarboxylic unit and at least either of (B) an aromatic secondary amine based compound and (D) a phenol based antioxidant and has an oxygen permeability coefficient of not more than 1.5 cc·mm/m2·day·atm at 23° C. and 75% RH.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: November 25, 2014
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Masashi Kurokawa
  • Patent number: 8895122
    Abstract: Disclosed is an m-xylene group-containing polyamide resin composition having excellent gas barrier properties and heat aging resistance, which contains (A) a polyamide composed of a diamine unit containing 30% by mole or more of an m-xylylenediamine unit and a dicarboxylic acid unit and (B) an aromatic secondary amine based compound and has an oxygen permeability coefficient of not more than 1 cc·mm/m2·day·atm at 23° C. and 75% RH.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: November 25, 2014
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Masashi Kurokawa
  • Patent number: 8603600
    Abstract: [Problems] Provided is a polyamide resin material having high elastic modulus, good gas barrier properties, low water absorption and excellent flexibility. [Means for solving the problems] This is a polyamide resin composition comprising a polyamide resin (A) composed of a diamine structural unit and a dicarboxylic acid structural unit wherein 70 mol % or more of the diamine structural unit is derived from xylylenediamine and 50 mol % or more of the dicarboxylic acid structural unit is derived from sebacic acid, and 1 to 40 parts by mass of at least one copolyamide (B) selected from the following group consisting of (B-1)-(B-3) per 100 parts by mass of the polyamide resin (A); (B-1): a copolyamide 6/66/12; (B-2): a copolyamide 6/66/11; (B-3): a polyether-polyamide copolymer composed of a polyamide 12 unit or a polyamide 11 unit and a polyether unit.
    Type: Grant
    Filed: July 4, 2011
    Date of Patent: December 10, 2013
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Masashi Kurokawa, Takahiro Takano
  • Patent number: 8487648
    Abstract: A semiconductor integrated circuit includes a macro connected between a first power supply line and a second power supply line to drive a load, and a power-supply-noise cancelling circuit connected between an input and an output of the macro to generate a current for canceling one of a current flowing from the first power supply line to the output of the macro and a current flowing from the output of the macro to the second power supply line, on the basis of a potential difference between the input and the output of the macro. The macro and the power-supply-noise cancelling circuit are mounted in a same chip.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: July 16, 2013
    Assignee: Renesas Electronics Corporation
    Inventors: Masashi Kurokawa, Kenichi Kawakami
  • Publication number: 20130172460
    Abstract: Provided is a xylylenesebacamide resin molding which is excellent in mechanical strength such as elastic modulus and avoids the problem of mechanical strength loss during long-term use. This is a molding of a polyamide resin or a polyamide resin composition containing the polyamide resin, wherein 70 mol % or more of the diamine structural unit is derived from xylylenediamine (A) and 50 mol % or more of the dicarboxylic acid structural unit is derived from sebacic acid (B), and the molding has a crystallinity index of 0 to 50% and a moisture content of 0.1 to 2% by mass.
    Type: Application
    Filed: September 29, 2011
    Publication date: July 4, 2013
    Applicant: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Masashi Kurokawa, Takahiro Takano
  • Publication number: 20130078402
    Abstract: [Problems] Provided is a polyamide resin material having high elastic modulus, good gas barrier properties, low water absorption and excellent flexibility. [Means for solving the problems] This is a polyamide resin composition comprising a polyamide resin (A) composed of a diamine structural unit and a dicarboxylic acid structural unit wherein 70 mol % or more of the diamine structural unit is derived from xylylenediamine and 50 mol % or more of the dicarboxylic acid structural unit is derived from sebacic acid, and 1 to 40 parts by mass of at least one copolyamide (B) selected from the following group consisting of (B-1)-(B-3) per 100 parts by mass of the polyamide resin (A); (B-1): a copolyamide 6/66/12; (B-2): a copolyamide 6/66/11; (B-3): a polyether-polyamide copolymer composed of a polyamide 12 unit or a polyamide 11 unit and a polyether unit.
    Type: Application
    Filed: July 4, 2011
    Publication date: March 28, 2013
    Applicant: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Masashi Kurokawa, Takahiro Takano
  • Publication number: 20130066041
    Abstract: Provided is a polyamide resin having excellent color tone and elastic modulus, excellent gas barrier properties and low water absorption. The polyamide resin comprises a diamine structural unit and a dicarboxylic acid structural unit, wherein 70 mol % or more of the diamine structural unit is derived from xylylenediamine (A-1) and/or bis(aminomethyl)cyclohexane (A-2) and 50 mol % or more of the dicarboxylic acid structural unit is derived from sebacic acid (B), characterized in that it has a sulfur atom concentration of 1 to 200 ppm by mass.
    Type: Application
    Filed: July 21, 2011
    Publication date: March 14, 2013
    Applicant: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Masashi Kurokawa, Shigeyuki Hirose, Nobuhiko Matsumoto
  • Publication number: 20120094048
    Abstract: Disclosed is a polyamide resin composition having excellent gas barrier properties and heat aging resistance, which contains (A) a polyamide composed of a diamine unit containing a 1,3-bis(aminomethyl)cyclohexane unit and a dicarboxylic unit and at least either of (B) an aromatic secondary amine based compound and (D) a phenol based antioxidant and has an oxygen permeability coefficient of not more than 1.5 cc·mm/m2·day·atm at 23° C. and 75% RH.
    Type: Application
    Filed: June 8, 2010
    Publication date: April 19, 2012
    Applicant: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Masashi Kurokawa
  • Publication number: 20120076964
    Abstract: Disclosed is an m-xylene group-containing polyamide resin composition having excellent gas barrier properties and heat aging resistance, which contains (A) a polyamide composed of a diamine unit containing 30% by mole or more of an m-xylylenediamine unit and a dicarboxylic acid unit and (B) an aromatic secondary amine based compound and has an oxygen permeability coefficient of not more than 1 cc·mm/m2·day·atm at 23° C. and 75% RH.
    Type: Application
    Filed: June 9, 2010
    Publication date: March 29, 2012
    Applicant: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Masashi Kurokawa
  • Patent number: 8124204
    Abstract: There is provided a multilayer bottle comprising a barrel portion including an outermost layer, an innermost layer and at least one barrier layer interposed between the outermost layer and the innermost layer, which satisfies the requirements represented by the following formulae (1) to (3) at the same time: OTR?0.2 cc·mm/(m2·day·atm)??(1) where OTR represents an average oxygen transmission rate of the barrier layer of the barrel portion; 20?(Average degree of orientation of barrier layer of barrel portion)?45; and??(2) 0?b/a×100?200??(3) where “a” represents an average thickness (?m) of the barrier layer of the barrel portion; and “b” represents an average thickness (?m) of the barrier layer of a bottom portion of the bottle. The multilayer bottle is free from delamination owing to impact upon dropping even when the bottle is formed with irregularities and bends and therefore exhibits a large freedom of design choice.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: February 28, 2012
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Tomomichi Kanda, Kazunobu Maruo, Masashi Kurokawa
  • Patent number: 8071910
    Abstract: A laser processing apparatus is provided with a first laser oscillator for laser CVD and a second laser oscillator for laser repair in a laser oscillation section. Either one of the first or second laser beam is irradiated by switching the first and second laser oscillators by a laser oscillator switch portion of a main body section. An optical path forming member is disposed such that the first or second laser beam, whichever is irradiated, will take the same optical path and reach a sample, after passing a common slit, to perform laser processing on the sample. Further, an objective lens is configured to be switched to an objective lens having a magnification corresponding to a wavelength of the laser beam irradiated from the laser oscillation section by an objective lens switch section of an objective lens section.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: December 6, 2011
    Assignee: Mitutoyo Corporation
    Inventors: Kenji Okabe, Shoichi Tanaka, Masashi Kurokawa
  • Publication number: 20110248741
    Abstract: A semiconductor integrated circuit includes a macro connected between a first power supply line and a second power supply line to drive a load, and a power-supply-noise cancelling circuit connected between an input and an output of the macro to generate a current for canceling one of a current flowing from the first power supply line to the output of the macro and a current flowing from the output of the macro to the second power supply line, on the basis of a potential difference between the input and the output of the macro. The macro and the power-supply-noise cancelling circuit are mounted in a same chip.
    Type: Application
    Filed: June 16, 2011
    Publication date: October 13, 2011
    Applicant: Renesas Electronics Corporation
    Inventors: Masashi Kurokawa, Kenichi Kawakami
  • Patent number: 7982490
    Abstract: Provided is a semiconductor integrated circuit including: an output circuit connected between a power supply (VDD0) and a ground (GND0), having an input connected to an input terminal, and having an output connected to an output terminal; and a power-supply-noise cancelling circuit connected between the input terminal and the output terminal to generate a current that cancels a current flowing from the power supply (VDD0) to the output terminal or a current flowing from the output terminal to the ground (GND0), based on a potential difference between the input terminal and the output terminal.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: July 19, 2011
    Assignee: Renesas Electronics Corporation
    Inventors: Masashi Kurokawa, Kenichi Kawakami
  • Patent number: 7927678
    Abstract: There is provided a multilayer bottle including an outermost layer and an innermost layer which are each made of a thermoplastic polyester resin, and at least one barrier layer interposed between the outermost layer and the innermost layer. The barrier layer contains at least two components including a polyamide obtained by polycondensing a diamine component containing m-xylylenediamine as a main component with a dicarboxylic acid component containing an ?,?-linear aliphatic dicarboxylic acid as a main component, and a thermoplastic resin having a lower molecular weight than that of the polyamide. The multilayer bottle hardly suffers from delamination upon impact or dropping and, therefore, is not required to have a shape with less irregularities or less bends for preventing the delamination, and further has a large freedom of design choice.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: April 19, 2011
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Jun Mitadera, Tomomichi Kanda, Kazunobu Maruo, Masashi Kurokawa
  • Patent number: 7723435
    Abstract: The single-layered structure of the invention comprises (A) 50 to 97% by weight of a polyolefin, (B) 2 to 45% by weight of a polyamide resin comprising a diamine component and a dicarboxylic acid component and (C) 1 to 45% by weight of a modified polyolefin and/or styrene copolymer. The polyamide resin B is dispersed in layers throughout the single-layered structure. With such a dispersion state of the polyamide resin B, the single-layered structure exhibits excellent fuel barrier properties.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: May 25, 2010
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Kazunobu Maruo, Kazunobu Sato, Masashi Kurokawa
  • Publication number: 20090283506
    Abstract: A laser processing apparatus is provided with a first laser oscillator for laser CVD and a second laser oscillator for laser repair in a laser oscillation section. Either one of the first or second laser beam is irradiated by switching the first and second laser oscillators by a laser oscillator switch portion of a main body section. An optical path forming member is disposed such that the first or second laser beam, whichever is irradiated, will take the same optical path and reach a sample, after passing a common slit, to perform laser processing on the sample. Further, an objective lens is configured to be switched to an objective lens having a magnification corresponding to a wavelength of the laser beam irradiated from the laser oscillation section by an objective lens switch section of an objective lens section.
    Type: Application
    Filed: May 15, 2009
    Publication date: November 19, 2009
    Applicant: MITUTOYO CORPORATION
    Inventors: Kenji Okabe, Shoichi Tanaka, Masashi Kurokawa
  • Publication number: 20090277858
    Abstract: There is provided a multilayer bottle including an outermost layer and an innermost layer which are each made of a thermoplastic polyester resin, and at least one barrier layer interposed between the outermost layer and the innermost layer. The barrier layer contains at least two components including a polyamide obtained by polycondensing a diamine component containing m-xylylenediamine as a main component with a dicarboxylic acid component containing an ?,?-linear aliphatic dicarboxylic acid as a main component, and a thermoplastic resin having a lower molecular weight than that of the polyamide. The multilayer bottle hardly suffers from delamination upon impact or dropping and, therefore, is not required to have a shape with less irregularities or less bends for preventing the delamination, and further has a large freedom of design choice.
    Type: Application
    Filed: December 21, 2006
    Publication date: November 12, 2009
    Inventors: Jun Mitadera, Tomomichi Kanda, Kazunobu Maruo, Masashi Kurokawa
  • Publication number: 20090237108
    Abstract: Provided is a semiconductor integrated circuit including: an output circuit connected between a power supply (VDD0) and a ground (GND0), having an input connected to an input terminal, and having an output connected to an output terminal; and a power-supply-noise cancelling circuit connected between the input terminal and the output terminal to generate a current that cancels a current flowing from the power supply (VDD0) to the output terminal or a current flowing from the output terminal to the ground (GND0), based on a potential difference between the input terminal and the output terminal.
    Type: Application
    Filed: March 23, 2009
    Publication date: September 24, 2009
    Applicant: NEC Electronics Corporation
    Inventors: Masashi Kurokawa, Kenichi Kawakami