Patents by Inventor Hiroki Takemoto

Hiroki Takemoto 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: 11975605
    Abstract: A front wheel clutch and a front wheel acceleration clutch are supported to a front wheel transmission shaft. Between the front wheel clutch and the front wheel acceleration clutch, there is provided a holder supporting the front wheel transmission shaft. A first operational oil passage for switching over the front wheel clutch is defined respectively in and between the holder and the front wheel transmission shaft. A second operational oil passage for switching over the front wheel acceleration clutch is defined respectively in and between the holder and the front wheel transmission shaft.
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: May 7, 2024
    Assignee: KUBOTA CORPORATION
    Inventors: Shunsuke Sonoda, Kenichiro Tsuji, Hiroki Takemoto
  • Publication number: 20230166699
    Abstract: A tractor includes: a vehicle body; an engine compartment; a driving unit that: is disposed behind the engine compartment, and includes: a brake pedal that includes: a support shaft; and a pedal arm portion; a master cylinder that is operated by the brake pedal and disposed further toward a vehicle-body back side than the support shaft; and a return spring that biases the brake pedal to swing back to a brake off position; and a partition that: is disposed further toward a vehicle-body front side than the brake pedal, and separates the engine compartment and the driving unit from each other, the return spring being engaged to the partition and to the pedal arm portion.
    Type: Application
    Filed: October 28, 2022
    Publication date: June 1, 2023
    Applicant: Kubota Corporation
    Inventors: Hiroki Takemoto, Satoshi Nagata, Masaru Shinya, Ryuichi Inoue
  • Publication number: 20220153132
    Abstract: A front wheel clutch and a front wheel acceleration clutch are supported to a front wheel transmission shaft. Between the front wheel clutch and the front wheel acceleration clutch, there is provided a holder supporting the front wheel transmission shaft. A first operational oil passage for switching over the front wheel clutch is defined respectively in and between the holder and the front wheel transmission shaft. A second operational oil passage for switching over the front wheel acceleration clutch is defined respectively in and between the holder and the front wheel transmission shaft.
    Type: Application
    Filed: April 2, 2020
    Publication date: May 19, 2022
    Applicant: KUBOTA CORPORATION
    Inventors: Shunsuke SONODA, Kenichiro TSUJI, Hiroki TAKEMOTO
  • Publication number: 20150021587
    Abstract: The objection of invention is to provide a composition for organic electroluminescent element having a smaller amount of foreign substance. The invention is a composition for organic electroluminescent element, which is for forming at least one layer selected from the group consisting of a light emitting layer, a hole injection layer and a hole transportation layer, wherein the composition comprises an aromatic amine polymer having a weight average molecular weight of 3,000 to 1,000,000 and a solvent, and a Zn concentration in the composition is less than 0.5 ppm.
    Type: Application
    Filed: October 9, 2014
    Publication date: January 22, 2015
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Junji MIZUKAMI, Wataru SHIMIZU, Hiroki TAKEMOTO
  • Patent number: 8338554
    Abstract: Disclosed is a novel optically stable hyperbranched polymer whose molecular terminal can be derivatized with various compounds; and a method for producing such a polymer. Specifically disclosed is a hyperbranched polymer having a structure represented by Formula (1) wherein a halogen atom is at a molecular terminal. The hyperbranched polymer can be obtained by substituting the molecular terminal dithiocarbamate group of a hyperbranched polymer having a dithiocarbamate group at a molecular terminal, which is obtained by living radical polymerization of a dithiocarbamate compound having a vinyl group structure, with a halogen atom. Also disclosed is a hyperbranched polymer wherein an amino group or an ammonium group is at a molecular terminal instead of a halogen atom.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: December 25, 2012
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Kei Yasui, Masaaki Ozawa, Akihiro Tanaka, Hiroki Takemoto
  • Patent number: 8153744
    Abstract: There is provided a novel hyperbranched polymer in which the refractive index is precisely controlled while retaining its hyperbranched structure, and a method for producing the hyperbranched polymer. Further, there is also provided an optically and thermally stable novel hyperbranched polymer in which the desired refractive index is precisely controlled, and a method for producing the hyperbranched polymer. The hyperbranched polymer has, as a branched structure, a repeating unit structure produced from two dithiocarbamate compounds each having a vinyl structure, at the polymerization initiation site having a vinyl structure. A specific example of the hyperbranched polymer can be produced by subjecting to a living radical polymerization N,N-diethyldithiocarbamylmethylstyrene in the presence of N,N-diethyldithiocarbamylethyl methacrylate.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: April 10, 2012
    Assignees: Nissan Chemical Industries, Ltd., Tokyo Institute of Technology
    Inventors: Hiroki Takemoto, Masaaki Ozawa, Koji Ishizu
  • Publication number: 20100240792
    Abstract: Disclosed is a novel hyperbranched polymer having a functional group in a molecular chain of a repeating unit. Also disclosed is a method for producing such a hyperbranched polymer. Specifically disclosed is a hyperbranched polymer having a repeating unit derived from a (meth)acrylate compound as a linear structure, while having a repeating unit derived from a dithiocarbamate compound having a vinyl group structure as a branched structure. This hyperbranched polymer can be obtained by holding a dithiocarbamate compound having a vinyl group structure and a (meth)acrylate compound together and subjecting them to a living radical polymerization.
    Type: Application
    Filed: June 13, 2007
    Publication date: September 23, 2010
    Applicants: Tokyo Institute of Technology, Nissan Chemical Industries, Ltd.
    Inventors: Koji Ishizu, Masaaki Ozawa, Hiroki Takemoto
  • Publication number: 20100048845
    Abstract: Disclosed is a novel optically stable hyperbranched polymer whose molecular terminal can be derivatized with various compounds; and a method for producing such a polymer. Specifically disclosed is a hyperbranched polymer having a structure represented by Formula (1) wherein a halogen atom is at a molecular terminal. The hyperbranched polymer can be obtained by substituting the molecular terminal dithiocarbamate group of a hyperbranched polymer having a dithiocarbamate group at a molecular terminal, which is obtained by living radical polymerization of a dithiocarbamate compound having a vinyl group structure, with a halogen atom. Also disclosed is a hyperbranched polymer wherein an amino group or an ammonium group is at a molecular terminal instead of a halogen atom.
    Type: Application
    Filed: August 29, 2007
    Publication date: February 25, 2010
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Kei Yasui, Masaaki Ozawa, Akihiro Tanaka, Hiroki Takemoto
  • Publication number: 20100010183
    Abstract: There is provided a novel hyperbranched polymer in which the refractive index is precisely controlled while retaining its hyperbranched structure, and a method for producing the hyperbranched polymer. Further, there is also provided an optically and thermally stable novel hyperbranched polymer in which the desired refractive index is precisely controlled, and a method for producing the hyperbranched polymer. The hyperbranched polymer has, as a branched structure, a repeating unit structure produced from two dithiocarbamate compounds each having a vinyl structure, at the polymerization initiation site having a vinyl structure. A specific example of the hyperbranched polymer can be produced by subjecting to a living radical polymerization N,N-diethyldithiocarbamylmethylstyrene in the presence of N,N-diethyldithiocarbamylethyl methacrylate.
    Type: Application
    Filed: September 4, 2007
    Publication date: January 14, 2010
    Inventor: Hiroki Takemoto
  • Publication number: 20090234088
    Abstract: Disclosed are a novel hyperbranched polymer which is optically and thermally stable and another novel hyperbranched polymer which is water-soluble, and optically and thermally stable. Also disclosed are methods for producing them. Specifically disclosed is a hyperbranched polymer obtained by reducing a molecular terminal (dithiocarbamate group) of a hyperbranched polymer, which is obtained through living-radical polymerization of a dithiocarbamate compound having a vinyl group structure and a maleic anhydride, to a hydrogen atom. Also disclosed is a hyperbranched polymer obtained by hydrolyzing the maleic anhydride unit of the above-obtained polymer, or a hyperbranched polymer obtained by hydrolyzing the maleic anhydride unit of the hyperbranched polymer obtained through living-radical polymerization of a dithiocarbamate compound having a vinyl group structure and a maleic anhydride.
    Type: Application
    Filed: May 18, 2007
    Publication date: September 17, 2009
    Applicants: NISSAN CHEMICAL INDUSTRIES, LTD., TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Hiroki Takemoto, Masaaki Ozawa, Akihiro Tanaka, Kei Yasui, Koji Ishizu
  • Patent number: 7511355
    Abstract: In a semiconductor device including a switching element and a fuse element which is connected in series with the switching element and which melts and blows out as a result of an electric current flowing therethrough when the switching element is placed in an electrically conducting state, in which an electrostatic breakdown protection circuit for preventing electrostatic breakdown is connected to a control line which applies a control signal for controlling the switching element, the effect of electrostatic noise can be reduced.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: March 31, 2009
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Hiroki Takemoto
  • Publication number: 20080139692
    Abstract: [Problems] To provide a novel hyperbranched polymer that is optically and thermally stable, and production method thereof. [Means for solving Problems] A hyperbranched polymer represented by Formula (1): and having a hydrogen atom or a thiol group at a molecular terminal thereof. The hyperbranched polymer can be produced by reducing a hyperbranched polymer having a dithiocarbamate group at a molecular terminal which is produced by living radical polymerization of a dithiocarbamate compound having a vinyl group structure, or by reacting the hyperbranched polymer having a dithiocarbamate group at a molecular terminal with a thiolation converting agent.
    Type: Application
    Filed: February 24, 2006
    Publication date: June 12, 2008
    Applicants: TOKYO INSTITUTE OF TECHNOLOGY, NISSAN CHEMICAL INDUSTRIES, LTD
    Inventors: Koji Ishizu, Masaaki Ozawa, Akihiro Tanaka, Hiroki Takemoto, Kei Yasui
  • Publication number: 20070063312
    Abstract: In a semiconductor device including a switching element and a fuse element which is connected in series with the switching element and which melts and blows out as a result of an electric current flowing therethrough when the switching element is placed in an electrically conducting state, in which an electrostatic breakdown protection circuit for preventing electrostatic breakdown is connected to a control line which applies a control signal for controlling the switching element, the effect of electrostatic noise can be reduced.
    Type: Application
    Filed: September 20, 2006
    Publication date: March 22, 2007
    Inventor: Hiroki Takemoto