Patents by Inventor Tsutomu Takai

Tsutomu Takai 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: 8120230
    Abstract: An acoustic wave device includes an acoustic wave element including an IDT electrode provided on a substrate, and a protective film arranged to cover the acoustic wave element so as to stabilize characteristics. The protective film is a silicon nitride film composed of silicon and nitrogen as main components and when a composition ratio of the silicon to the nitrogen is represented by 1:X, X is about 1.15 or less.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: February 21, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tsutomu Takai, Norihiro Hayakawa, Taro Nishino
  • Patent number: 7976988
    Abstract: A non-aqueous electrolyte comprising (i) a non-aqueous solvent, especially mainly composed of a cyclic carbonate and a cyclic ester and optionally a linear carbonate, and (ii) an electrolyte salt, especially LiBF4, dissolved therein and (iii) a vinyl sulfone derivative having the formula (I): wherein R indicates a C1 to C12 alkyl group, C2 to C12 alkenyl group, or C3 to C6 cycloalkyl, and also a lithium secondary battery using the same are disclosed.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: July 12, 2011
    Assignee: UBE Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai
  • Publication number: 20100219717
    Abstract: An acoustic wave device includes an acoustic wave element including an IDT electrode provided on a substrate, and a protective film arranged to cover the acoustic wave element so as to stabilize characteristics. The protective film is a silicon nitride film composed of silicon and nitrogen as main components and when a composition ratio of the silicon to the nitrogen is represented by 1:X, X is about 1.15 or less.
    Type: Application
    Filed: May 21, 2010
    Publication date: September 2, 2010
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Tsutomu TAKAI, Norihiro HAYAKAWA, Taro NISHINO
  • Patent number: 7691539
    Abstract: A method of increasing the discharge capacity retention of a non-aqueous lithium ion secondary battery having a positive electrode active material, a combination of a lithium element and a complex metal oxide, a negative electrode, and a non-aqueous electrolytic solution comprising an electrolyte dissolved in a non-aqueous solvent which is a combination of a cyclic carbonate and a linear carbonate by incorporating a disulfide derivative having the formula: R1—S—S—R2 wherein each of R1 and R2 independently represents a phenyl group, a benzyl group, a tolyl group, a pyridyl group, a pyrimidyl group, an alkyl group having 1 to 12 carbon atom, or a cycloalkyl group having 3 to 6 carbon atoms, in which each group has no substituent groups or has one or more alkyl groups into the non-aqueous electrolytic solution.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: April 6, 2010
    Assignee: UBE Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori
  • Publication number: 20070207389
    Abstract: A non-aqueous electrolyte comprising (i) a non-aqueous solvent, especially mainly composed of a cyclic carbonate and a cyclic ester and optionally a linear carbonate, and (ii) an electrolyte salt, especially LiBF4, dissolved therein and (iii) a vinyl sulfone derivative having the formula (I): wherein R indicates a C1 to C12 alkyl group, C2 to C12 alkenyl group, or C3 to C6 cycloalkyl, and also a lithium secondary battery using the same are disclosed.
    Type: Application
    Filed: January 30, 2007
    Publication date: September 6, 2007
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori
  • Patent number: 6866966
    Abstract: A discharge capacity retention of a non-aqueous secondary battery is enhanced by incorporating into its non-aqueous electrolytic solution a small amount of a substituted diphenyldisulfide derivative in which each of the diphenyl groups has a substituent such as alkoxy, alkenyloxy, alkynyloxy, cycloalkyloxy, aryloxy, acyloxy, alkanesulfonyloxy, arylsulfonyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, halogen, CF3, CCl3, or CBr3. Preferably, a small amount of methyl 2-propylcarbonate, 2-propynyl methanesulfonate, 1,3-propanesultone, divinylsulfone, 1,4-butanediol dimethanesulfonate or cyclohexylbenzene is further incorporated.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: March 15, 2005
    Assignee: Ube Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori, Akira Ueki
  • Publication number: 20050042521
    Abstract: A method of increasing the discharge capacity retention of a non-aqueous lithium ion secondary battery having a positive electrode active material, a combination of a lithium element and a complex metal oxide, a negative electrode, and a non-aqueous electrolytic solution comprising an electrolyte dissolved in a non-aqueous solvent which is a combination of a cyclic carbonate and a linear carbonate by incorporating a disulfide derivative having the formula: R1—S—S—R2 wherein each of R1 and R2 independently represents a phenyl group, a benzyl group, a tolyl group, a pyridyl group, a pyrimidyl group, an alkyl group having 1 to 12 carbon atom, or a cycloalkyl group having 3 to 6 carbon atoms, in which each group has no substituent groups or has one or more alkyl groups into the non-aqueous electrolytic solution.
    Type: Application
    Filed: March 6, 2003
    Publication date: February 24, 2005
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori
  • Publication number: 20040121240
    Abstract: A non-aqueous electrolyte comprising (i) a non-aqueous solvent, especially mainly composed of a cyclic carbonate and a cyclic ester and optionally a linear carbonate, and (ii) an electrolyte salt, especially LiBF4, dissolved therein and (iii) a vinyl sulfone derivative having the formula (I): 1
    Type: Application
    Filed: December 9, 2003
    Publication date: June 24, 2004
    Applicant: Ube Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori
  • Patent number: 6699998
    Abstract: A non-aqueous electrolyte comprising a non-aqueous solvent and a lithium salt dissolved therein, and a cyclic carbonate, linear carbonate, and vinylene carbonate having a chlorine content of 100 ppm or less, and a lithium secondary battery using the same.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: March 2, 2004
    Assignee: UBE Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori
  • Patent number: 6656642
    Abstract: A non-aqueous electrolytic solution favorably employable for a lithium secondary battery employs a non-aqueous solvent composed of a cyclic carbonate, a linear carbonate and vinylene carbonate, and shows a reduction potential of less than 1 volt, with reference to lithium, or contains chlorine atom-containing organic compounds in an amount of 10 ppm or less, in terms of chlorine atom content.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: December 2, 2003
    Assignee: Ube Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Akira Ueki, Koji Abe, Tsutomu Takai
  • Publication number: 20030148190
    Abstract: A non-aqueous electrolyte comprising (i) a non-aqueous solvent, especially mainly composed of a cyclic carbonate and a cyclic ester and optionally a linear carbonate, and (ii) an electrolyte salt, especially LiBF4, dissolved therein and (iii) a vinyl sulfone derivative having the formula (I): 1
    Type: Application
    Filed: May 11, 2000
    Publication date: August 7, 2003
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori
  • Publication number: 20020168576
    Abstract: A non-aqueous electrolyte comprising a non-aqueous solvent and a lithium salt dissolved therein, and a cyclic carbonate, linear carbonate, and vinylene carbonate having a chlorine content of 100 ppm or less, and a lithium secondary battery using the same.
    Type: Application
    Filed: March 29, 2002
    Publication date: November 14, 2002
    Applicant: Ube Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Akira Ueki, Koji Abe, Tsutomu Takai
  • Patent number: 6479191
    Abstract: An electrolyte for a lithium secondary battery comprising (i) a non-aqueous solvent, especially consists essentially of a high dielectric solvent and a low viscosity solvent, and (ii) an electrolyte salt, dissolved therein and (iii) an alkyne derivative or an alkyne carbonate derivative and also a lithium secondary battery using the same are disclosed.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: November 12, 2002
    Assignee: Ube Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori, Akikazu Ito
  • Publication number: 20020122988
    Abstract: A discharge capacity retention of a non-aqueous secondary battery is enhanced by incorporating into its non-aqueous electrolytic solution a small amount of a substituted diphenyldisulfide derivative in which each of the diphenyl groups has a substituent such as alkoxy, alkenyloxy, alkynyloxy, cycloalkyloxy, aryloxy, acyloxy, alkanesulfonyloxy, arylsulfonyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, halogen, CF3, CCl3, or CBr3. Preferably, a small amount of methyl 2-propylcarbonate, 2-propynyl methanesulfonate, 1,3-propanesultone, divinylsulfone, 1,4-butanediol dimethanesulfonate or cyclohexylbenzene is further incorporated.
    Type: Application
    Filed: October 22, 2001
    Publication date: September 5, 2002
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori, Akira Ueki
  • Patent number: 6436582
    Abstract: A non-aqueous electrolyte comprising (i) a non-aqueous solvent and (ii) an electrolyte salt dissolved therein and (iii) a disulfonate ester derivative having the formula (I): wherein R indicates a C1 to C6 alkyl group and X indicates a straight-chain alkylene group having a C2-C6 principal chain or a branched alkylene group having a C2-C6 principal chain with at least one side-chain composed of a. C1-C4 alkyl group, and also a lithium secondary battery using the same are disclosed.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: August 20, 2002
    Assignee: Ube Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori
  • Publication number: 20020103394
    Abstract: An organometallic copper complex having the following formula is favorably employable for preparing copper metal film by chemical vapor deposition: 1
    Type: Application
    Filed: November 6, 2001
    Publication date: August 1, 2002
    Inventors: Takumi Kadota, Tsutomu Takai, Kouhei Watanuki
  • Patent number: 6413677
    Abstract: A lithium secondary battery electrolyte comprising a non-aqueous solvent and a lithium salt dissolved therein, said electrolyte containing at least one compound having the formula (I) or (II): wherein, R1 and R2 independently indicate, a C1 to C12 alkyl group, a C3 to C6 cycloalkyl group, or an aryl group, x indicates an oxygen atom or a sulfur atom, and n indicates an integer of 1 or 2; R3—S—M  (II) wherein, R3 indicates a C1 to C15 alkyl group or a C3 to C12 cycloalkyl group which may be substituted with at least one C1 to C4 alkyl group, a C7 to C15 benzyl group which may be substituted with at least one C1 to C4 alkyl group, or a C6 to C15 aryl group, which may be substituted with at least one C1 to C4 alkyl group, M indicates an alkali metal, and R3 may be substituted with at least one halogen atom; and a lithium secondary battery using the same.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: July 2, 2002
    Assignee: UBE Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Koji Abe, Tsutomu Takai, Yasuo Matsumori, Kazuhiro Miyoshi, Akira Ueki
  • Patent number: 6413678
    Abstract: A non-aqueous electrolyte comprising a non-aqueous solvent and a lithium salt dissolved therein, and a cyclic carbonate, linear carbonate, and vinylene carbonate having a chlorine content of 100 ppm or less, and a lithium secondary battery using the same.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: July 2, 2002
    Assignee: Ube Industries, Inc.
    Inventors: Toshikazu Hamamoto, Akira Ueki, Koji Abe, Tsutomu Takai
  • Publication number: 20010044051
    Abstract: A non-aqueous electrolytic solution favorably employable for a lithium secondary battery employs a non-aqueous solvent composed of a cyclic carbonate, a linear carbonate and vinylene carbonate, and shows a reduction potential of less than 1 volt, with reference to lithium, or contains chlorine atom-containing organic compounds in an amount of 10 ppm or less, in terms of chlorine atom content.
    Type: Application
    Filed: April 17, 2001
    Publication date: November 22, 2001
    Applicant: Ube Industries, Ltd.
    Inventors: Toshikazu Hamamoto, Akira Ueki, Koji Abe, Tsutomu Takai
  • Patent number: 6269185
    Abstract: Eight lattice-point data items of a unit cube are output from LUT memories according to upper 3-bit signal of 3-dimensional color space signals input to an input system. The magnitudes of the input 3-dimensional color space signals are compared in a comparison operating section. The spatial coordinate position of an output value is determined based on the result of comparison by a spatial position determining section and one of the divided polyhedrons is selected by a divided polyhedron selecting section. Further, whether or not a to-be-derived output value is present near the boundary surface of the divided polyhedron is determined based on the result of comparison of the comparison operating section by a boundary surface neighborhood determining section. When it is determined that the to-be-output value lies near the boundary surface, lattice-point data items are selectively corrected by data correction processing section.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: July 31, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tsutomu Takai