Patents by Inventor Shuji Kubota

Shuji Kubota 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: 10934432
    Abstract: Disclosed is a conductive polyamide resin composition that excels not only in electroconductivity, but also in fuel resistance, particularly resistance against alcohol-containing fuel, and further excels in fluidity and moldability, and is capable of yielding a molded article with high impact resistance, the conductive polyamide resin composition including: 84 to 40% by mass of a polyamide resin (A); 5 to 30% by mass of conductive carbon black (B); 3 to 30% by mass of an ethylene-?-olefin copolymer (C) that has a reactive functional group capable of reacting with a terminal group of polyamide resin and/or an amido group on a principal chain of polyamide resin; and 1 to 20% by mass of a conductive polyethylene resin (D).
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: March 2, 2021
    Assignee: TOYOBO CO., LTD.
    Inventors: Shuji Kubota, Nobuhiro Yoshimura, Yuhei Fukumoto, Kazuki Iwamura, Kiyofumi Sakai, Osamu Mabuchi
  • Patent number: 10676577
    Abstract: The present invention is a glass-fiber-reinforced polyamide resin composition which contains a crystalline aliphatic polyamide resin (A), an amorphous polyamide resin (B), an acrylic resin (C), mica (D), glass fiber (E) and carbon black (F) in a ratio by mass of (10 to 40):(2 to 20):(1 to 10):(2 to 25):(20 to 50):(0.1 to 5), respectively and further contains a copper compound (G) in a rate of 0.005 to 1.0 part by mass when a total amount of the ingredients (A) to (F) is taken as 100 parts by mass.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: June 9, 2020
    Assignee: TOYOBO CO., LTD.
    Inventors: Kazunari Tanaka, Shuji Kubota
  • Publication number: 20200010678
    Abstract: Disclosed is a conductive polyamide resin composition that excels not only in electroconductivity, but also in fuel resistance, particularly resistance against alcohol-containing fuel, and further excels in fluidity and moldability, and is capable of yielding a molded article with high impact resistance, the conductive polyamide resin composition including: 84 to 40% by mass of a polyamide resin (A); 5 to 30% by mass of conductive carbon black (B); 3 to 30% by mass of an ethylene-?-olefin copolymer (C) that has a reactive functional group capable of reacting with a terminal group of polyamide resin and/or an amido group on a principal chain of polyamide resin; and 1 to 20% by mass of a conductive polyethylene resin (D).
    Type: Application
    Filed: February 6, 2018
    Publication date: January 9, 2020
    Applicant: TOYOBO CO., LTD.
    Inventors: Shuji KUBOTA, Nobuhiro YOSHIMURA, Yuhei FUKUMOTO, Kazuki IWAMURA, Kiyofumi SAKAI, Osamu MABUCHI
  • Publication number: 20180371185
    Abstract: The present invention is a glass-fiber-reinforced polyamide resin composition which contains a crystalline aliphatic polyamide resin (A), an amorphous polyamide resin (B), an acrylic resin (C), mica (D), glass fiber (E) and carbon black (F) in a ratio by mass of (10 to 40):(2 to 20):(1 to 10):(2 to 25):(20 to 50):(0.1 to 5), respectively and further contains a copper compound (G) in a rate of 0.005 to 1.0 part by mass when a total amount of the ingredients (A) to (F) is taken as 100 parts by mass.
    Type: Application
    Filed: November 29, 2016
    Publication date: December 27, 2018
    Applicant: TOYOBO CO., LTD.
    Inventors: Kazunari TANAKA, Shuji KUBOTA
  • Publication number: 20180222314
    Abstract: Provided is a component used in a fuel feed apparatus (500), containing: a conductive polyamide layer (25) formed of a conductive polyamide resin composition, in which the conductive polyamide resin composition contains: a polyamide resin, a conductive carbon black, an ethylene-?-olefin copolymer, and a conductive polyethylene resin, and satisfies the following characteristics (a) and (b): (a) initial volume resistivity of a flat plate obtained by injection forming is 1×105 ?·cm or less, and volume resistivity after exposing the flat plate to CM15 fuel for 168 hours is 1×107 ?·cm or less, and (b) charpy impact strength at ?40° C. of a test piece obtained by injection forming is 2.0 KJ/m2 or greater.
    Type: Application
    Filed: February 6, 2018
    Publication date: August 9, 2018
    Inventors: Kiyofumi SAKAI, Osamu MABUCHI, Shuji KUBOTA, Nobuhiro YOSHIMURA, Yuhei FUKUMOTO, Kazuki IWAMURA
  • Patent number: 8168031
    Abstract: The present invention provides a method for joining a metallic material, a glass material or a ceramic material, and a resin material, that have no limitation in their field of application and that can form a strong joint by an easy method. The method for joining a metallic material, a glass material or a ceramic material, and a resin material is characterized in that joining is effected by heating a portion to be joined, in such a state that the metallic material, glass material or ceramic material is coupled with the resin material, to a temperature at which bubbles (preferably the sphere equivalent diameter from 0.01 mm to 5.0 mm) are generated in the resin material at the portion to be joined. As a heating source for heating the portion to be joined, a laser light source is used, especially.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: May 1, 2012
    Assignee: Osaka University
    Inventors: Seiji Katayama, Yosuke Kawahito, Shuji Kubota, Akio Tange
  • Publication number: 20090252978
    Abstract: The present invention provides a method for joining a metallic material, a glass material or a ceramic material, and a resin material, that have no limitation in their field of application and that can form a strong joint by an easy method. The method for joining a metallic material, a glass material or a ceramic material, and a resin material is characterized in that joining is effected by heating a portion to be joined, in such a state that the metallic material, glass material or ceramic material is coupled with the resin material, to a temperature at which bubbles (preferably the sphere equivalent diameter from 0.01 mm to 5.0 mm) are generated in the resin material at the portion to be joined. As a heating source for heating the portion to be joined, a laser light source is used, especially.
    Type: Application
    Filed: August 7, 2006
    Publication date: October 8, 2009
    Applicants: OSAKA UNIVERSITY, TOYO BOSEKI KABUSHIKI KAISHA
    Inventors: Seiji Katayama, Yosuke Kawahito, Shuji Kubota, Akio Tange
  • Patent number: 5705296
    Abstract: A lithium secondary battery comprising a positive electrode composed of a positive electrode active material comprising at least one member selected from the group consisting of lithium phosphate, lithium-cobalt phosphate, cobalt oxide, and lithium-cobalt oxide, such that the molar ratio of cobalt:phosphorus:lithium is more than 0.1: more than 0.2:1, a negative electrode, and an electrolyte. The lithium secondary battery of the invention has high energy density leading to high discharge capacity, high electromotive force, and high discharge voltage, and excellent cycle properties.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 6, 1998
    Assignee: Mitsubishi Cable Industries, Ltd.
    Inventors: Masahiro Kamauchi, Hiroshi Soejima, Shuji Kubota, Kouzou Sasaki
  • Patent number: 5633599
    Abstract: In a semiconductor integrated circuit provided with a circuit for testing an input buffer threshold voltage, an output node of a first logic gate having its output logic value determined by an output signal of an input buffer, and an output node of a second logic gate having its output logic value determined by a condition setting signal from an external source, are connected to a common signal line. When a standardized voltage for discriminating the threshold voltage is applied to the input buffer, if the input buffer malfunctions, the output signal of the first logic gate collides with the output signal of the second logic gate on the common signal line, so that a power supply current greatly increases.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: May 27, 1997
    Assignee: NEC Corporation
    Inventor: Shuji Kubota
  • Patent number: 5538814
    Abstract: A lithium secondary battery comprising a positive electrode composed of a positive electrode active material comprising at least one member selected from the group consisting of lithium phosphate, lithium-cobalt phosphate, cobalt oxide, and lithium-cobalt oxide, such that the molar ratio of cobalt:phosphorus: lithium is more than 0.1:more than 0.2:1, a negative electrode, and an electrolyte. The lithium secondary battery of the invention has high energy density leading to high discharge capacity, high electromotive force, and high discharge voltage, and excellent cycle properties.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: July 23, 1996
    Assignee: Mitsubishi Cable Industries, Ltd.
    Inventors: Masahiro Kamauchi, Hiroshi Soejima, Shuji Kubota, Kouzou Sasaki
  • Patent number: 5384809
    Abstract: A serial-parallel converter is arranged to convert an information sequence into a plurality of bit sequences. Two convolutional encoders are provided which respectively receive bit sequences from the serial-parallel converter. Each of the two convolutional encoders outputs first and second bit sequences. First parallel-serial converter receives the first bit sequences and converts them into third bit sequence, while second parallel-serial converter receives the second bit sequences and converts them into fourth bit sequence. The third and fourth bit sequences are used to modulate two carriers with a phase difference of .pi./2 radians.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: January 24, 1995
    Assignees: Nippon Telegraph and Telephone Corporation, NEC Corporation
    Inventors: Toshiharu Yagi, Shuzo Kato, Shuji Kubota
  • Patent number: 5327441
    Abstract: In a simple decoder which decodes convolutional codes of constraint length K and coding rate n/m, encoded data which is supplied thereto in steps of m bits are distributed, bit by bit, to m shift registers each having x=[(K-1)/(m-n)] series-connected shift stages. Here, [p] means the minimum integer equal to or larger than a real number p. The connection of n modulo-2 addition circuits to all the shift stages of all the shift registers is defined by n decoding generative vectors which define n decoding generative polynomials. The modulo-2 addition circuits perform modulo-2 additions of the outputs of the shift stages connected thereto and output n results of additions as decoded results of n bits. The n decoding generative vectors are selected from decoding generative vectors of N rows which are obtained as an inverse matrix of a square matrix whose elements are N.times.N coefficients which define N=mx convolutional code generating polynomials.
    Type: Grant
    Filed: December 15, 1992
    Date of Patent: July 5, 1994
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Katsuhiko Kawazoe, Shunji Honda, Shuji Kubota, Shuzo Kato
  • Patent number: 5280537
    Abstract: A digital communication system using superposed transmission of high and low speed digital signals capable of transmitting superposed high and low speed digital signals through an identical frequency band efficiently by increasing a simultaneously transmittable number of channels in the low speed digital signals, while achieving the practically reasonable bit error rate performances for both the high speed digital signals and the low speed digital signals.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: January 18, 1994
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takatoshi Sugiyama, Shuji Kubota, Masahiro Morikura, Kiyoshi Enomoto, Shuzo Kato
  • Patent number: 4805174
    Abstract: This invention relates to a convolutional encoder which encodes original data into convolutional codes by using a multinomial from which predetermined terms of the generation multinomial for generating the original convolutional codes are eliminated to thereby achieve high transmission efficiency as well as high error correcting capacity. The maximum likelihood decoder which is provided on the receiver side to correspond to the encoder can decode in maximum likelihood by calculating the branch metrics of received encoded data and decode the original data in correspondence to the coding rate of the original data with those branch metrics.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: February 14, 1989
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Shuji Kubota, Shuzo Kato