Patents by Inventor Tetsuya Akamatsu

Tetsuya Akamatsu 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: 20210194006
    Abstract: Provided is a binder for use in an electrode layer or separator for a lithium-ion secondary battery, wherein the binder is unlikely to cause powder removal and does not completely cover the surface of the active material particles when used in an electrode layer as a binder. The binder of the present invention is a binder for a non-aqueous secondary battery, the binder comprising a fibrid of an aromatic polyamide, wherein the fibrid swells and is not dissolved in an N-methyl-2-pyrrolidone solvent in which an alkali metal salt and/or an alkaline earth metal salt is present at a concentration of 1,000 ppm or less, and is completely dissolved in an N-methyl-2-pyrrolidone solvent in which an alkali metal salt and/or an alkaline earth metal salt is present at a concentration of 10,000 ppm or more.
    Type: Application
    Filed: June 28, 2019
    Publication date: June 24, 2021
    Applicant: TEIJIN LIMITED
    Inventor: Tetsuya AKAMATSU
  • Publication number: 20200247964
    Abstract: A high-concentration particle-containing film that contains a large amount of particles while having excellent flexibility is provided. The high-concentration particle-containing film of the invention includes a para-copolymerized aromatic polyamide obtained by copolymerization of para-phenylenediamine, a copolymerizing diamine and para-terephthaloyl dichloride, and particles, wherein the weight proportion of the copolymerizing diamine is in the range of 25 to 75 wt % of the entire diamine component and the particles are present at 55 vol % or greater, and the copolymerizing diamine is 3,3?-oxydiphenylenediamine, 3,4?-oxydiphenylenediamine or 4,4?-oxydiphenylenediamine.
    Type: Application
    Filed: June 27, 2018
    Publication date: August 6, 2020
    Applicant: TEIJIN LIMITED
    Inventor: Tetsuya AKAMATSU
  • Publication number: 20190062511
    Abstract: The present invention provides a prepreg which is composed of at least a matrix resin and reinforcing fibers, and which is characterized in that: conductive parts are formed on one surface or both surfaces of a fiber layer that is formed of the reinforcing fibers; and the volume resistivity ? (?cm) of the fiber layer in the thickness direction, the thickness t (cm) of the fiber layer and the average interval L (cm) between the conductive parts arranged on the prepreg surface satisfy formula (1). t/?×1/L×100?0.
    Type: Application
    Filed: April 13, 2017
    Publication date: February 28, 2019
    Applicant: TEIJIN LIMITED
    Inventors: Kazuma KUROKAWA, Tetsuya AKAMATSU, Hiroaki KUWAHARA
  • Publication number: 20190044118
    Abstract: A separator for a non-aqueous secondary battery that is composed of a composite membrane containing a porous substrate, and a heat-resistant adhesive porous layer provided on one side or both sides of the porous substrate, in which the heat-resistant adhesive porous layer contains an acrylic type resin, and a heat-resistant resin that has a glass transition temperature of 200° C. or more and that has an amide-structure.
    Type: Application
    Filed: July 25, 2018
    Publication date: February 7, 2019
    Applicant: TEIJIN LIMITED
    Inventors: Hiroshi SAKURAI, Satoshi NISHIKAWA, Tetsuya AKAMATSU
  • Patent number: 8916310
    Abstract: A conductive sheet comprises an aromatic polyamide pulp, a fluoroplastic fused to the aromatic polyamide pulp, and a carbon-based conductive material; wherein the conductive sheet has a static contact angle of water on a first surface that is greater than the static contact angle of water on a second surface that in the opposite surface to the first surface, and the difference between the static contact angle of water on the first surface and the static contact angle of water on the second surface is 20°-180°; or wherein the injection pressure of water on the first surface of the conductive sheet is less than the injection pressure of water on the second surface that is the opposite surface to the first surface, and the difference between the injection pressure of water on the first surface and the injection pressure of water on the second surface is 20-50 kPa.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: December 23, 2014
    Assignee: Toho Tenax Co., Ltd.
    Inventors: Kazuma Kurokawa, Tetsuya Akamatsu
  • Patent number: 8883303
    Abstract: The invention pertains to a method for making a polymer-additive composite particle from a dope by jet spinning the dope to obtain a pulp, fibril or fibrid, wherein the solvent of the dope is selected from N-methyl-2-pyrrolidone, N,N?-dimethylformamide, N,N?-dimethylacetamide, tetramethylurea, and 4 to 75 wt % of a composition consisting of 2 to 95 wt % of a para-aramid polymer and 5-98 wt % of a solid additive material, to a total of 100 wt %, and wherein the aramid polymer is dissolved in the solvent; or coagulating the dope by means of a rotor-stator apparatus in which the polymer solution is applied through the stator on the rotor so that the precipitating polymer-additive composite particle is subjected to shear forces while they are in a plastic deformable stage.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: November 11, 2014
    Assignee: Teijin Aramid B.V.
    Inventors: Anton Johannes Josef Hendriks, Mirjam Ellen Oldenzeel, Johannus Maria Bergmans, Tetsuya Akamatsu
  • Publication number: 20130157171
    Abstract: A conductive sheet comprises an aromatic polyamide pulp, a fluoroplastic fused to the aromatic polyamide pulp, and a carbon-based conductive material; wherein the conductive sheet has a static contact angle of water on a first surface that is greater than the static contact angle of water on a second surface that in the opposite surface to the first surface, and the difference between the static contact angle of water on the first surface and the static contact angle of water on the second surface is 20°-180°; or wherein the injection pressure of water on the first surface of the conductive sheet is less than the injection pressure of water on the second surface that is the opposite surface to the first surface, and the difference between the injection pressure of water on the first surface and the injection pressure of water on the second surface is 20-50 kPa.
    Type: Application
    Filed: August 24, 2011
    Publication date: June 20, 2013
    Applicant: TOHO TENAX CO., LTD.
    Inventors: Kazuma Kurokawa, Tetsuya Akamatsu
  • Patent number: 8398906
    Abstract: The invention pertains to a method for making a polymer-additive composite particle from a dope by jet spinning the dope to obtain a pulp, fibril or fibrid, wherein the solvent of the dope is selected from N-methyl-2-pyrrolidone, N,N?-dimethylformamide, N,N?-dimethylacetamide, tetramethylurea, and 4 to 75 wt % of a composition consisting of 2 to 95 wt % of a para-aramid polymer and 5-98 wt % of a solid additive material, to a total of 100 wt %, and wherein the aramid polymer is dissolved in the solvent; or coagulating the dope by means of a rotor-stator apparatus in which the polymer solution is applied through the stator on the rotor so that the precipitating polymer-additive composite particle is subjected to shear forces while they are in a plastic deformable stage.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: March 19, 2013
    Assignee: Teijin Aramid B.V.
    Inventors: Anton Johannes Josef Hendriks, Mirjam Ellen Oldenzeel, Johannus Maria Bergmans, Tetsuya Akamatsu
  • Patent number: 7977982
    Abstract: A semiconductor integrated circuit, including: a logic section; an initiating current generating section for generating initiating current for initiating or re-initiating a circuit when the circuit is to be initiated or the circuit operates abnormally; an initiating current detecting section for detecting the initiating current of the initiating current generating section and outputting a detection signal indicating whether or not the initiating current generating section operates normally; and a signal selection section for selecting one of the detection signal and an output from the logic section based on an internal signal of the logic section which is controllable from outside of the logic section, and outputting the selected one to a terminal.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: July 12, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tetsuya Akamatsu, Hideki Shioe, Haruya Mori
  • Publication number: 20100056731
    Abstract: The invention pertains to a method for making a polymer-additive composite particle from a dope by jet spinning the dope to obtain a pulp, fibril or fibrid, wherein the solvent of the dope is selected from N-methyl-2-pyrrolidone, N,N?-dimethylformamide, N,N?-dimethylacetamide, tetramethylurea, and 4 to 75 wt % of a composition consisting of 2 to 95 wt % of a para-aramid polymer and 5-98 wt % of a solid additive material, to a total of 100 wt %, and wherein the aramid polymer is dissolved in the solvent; or coagulating the dope by means of a rotor-stator apparatus in which the polymer solution is applied through the stator on the rotor so that the precipitating polymer-additive composite particle is subjected to shear forces while they are in a plastic deformable stage.
    Type: Application
    Filed: March 28, 2008
    Publication date: March 4, 2010
    Applicant: Teijin Aramid B.V.
    Inventors: Anton Johannes Josef Hendriks, Mirjam Ellen Oldenzeel, Johannus Maria Bergmans, Tetsuya Akamatsu
  • Patent number: 7166916
    Abstract: A semiconductor integrated circuit is so structured that a first insulating layer is formed on a surface of a semiconductor chip and a second insulating layer covers an entire region of the surface of the semiconductor chip. Via apertures made to the second insulating layer, an electrical connection configuration is formed from above the second insulating layer by using gold wires. Then, an electronic component is mounted on the second insulating layer. By arranging as such, the electronic component is mounted on the semiconductor chip in advance. Therefore, it is possible to further reduce mounting space on a printed-wiring board and also possible to make is easy to attain one-packaged IC.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: January 23, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tetsuya Akamatsu, Masanori Inamori
  • Publication number: 20060271324
    Abstract: A semiconductor integrated circuit, including: a logic section; an initiating current generating section for generating initiating current for initiating or re-initiating a circuit when the circuit is to be initiated or the circuit operates abnormally; an initiating current detecting section for detecting the initiating current of the initiating current generating section and outputting a detection signal indicating whether or not the initiating current generating section operates normally; and a signal selection section for selecting one of the detection signal and an output from the logic section based on an internal signal of the logic section which is controllable from outside of the logic section, and outputting the selected one to a terminal.
    Type: Application
    Filed: February 23, 2006
    Publication date: November 30, 2006
    Inventors: Tetsuya Akamatsu, Hideki Shioe, Haruya Mori
  • Patent number: 6972602
    Abstract: A power-on reset circuit comprises a power supply voltage detection circuit that detects a rise of a power supply voltage and that changes a logic level of a first internal node; a capacitor charge/discharge circuit that charges and discharges a capacitor according to the first internal node level and that in an event that the power supply voltage is reduced, discharges the capacitor to follow the event; and a reset pulse generation circuit that before the power supply voltage rises higher than the predetermined voltage, outputs a first output voltage to an output node and that after the power supply voltage has risen higher than the predetermined voltage, outputs a second output voltage to the output node upon detecting that a charge level of the capacitor has become higher than a charge level detection voltage.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: December 6, 2005
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tetsuya Akamatsu, Hiroki Doi, Masanori Inamori
  • Publication number: 20050224962
    Abstract: A semiconductor integrated circuit is so structured that a first insulating layer is formed on a surface of a semiconductor chip and a second insulating layer covers an entire region of the surface of the semiconductor chip. Via apertures made to the second insulating layer, an electrical connection configuration is formed from above the second insulating layer by using gold wires. Then, an electronic component is mounted on the second insulating layer. By arranging as such, the electronic component is mounted on the semiconductor chip in advance. Therefore, it is possible to further reduce mounting space on a printed-wiring board and also possible to make is easy to attain one-packaged IC.
    Type: Application
    Filed: November 23, 2004
    Publication date: October 13, 2005
    Inventors: Tetsuya Akamatsu, Masanori Inamori
  • Publication number: 20040212409
    Abstract: A power-on reset circuit comprises a power supply voltage detection circuit that detects a rise of a power supply voltage and that changes a logic level of a first internal node; a capacitor charge/discharge circuit that charges and discharges a capacitor according to the first internal node level and that in an event that the power supply voltage is reduced, discharges the capacitor to follow the event; and a reset pulse generation circuit that before the power supply voltage rises higher than the predetermined voltage, outputs a first output voltage to an output node and that after the power supply voltage has risen higher than the predetermined voltage, outputs a second output voltage to the output node upon detecting that a charge level of the capacitor has become higher than a charge level detection voltage.
    Type: Application
    Filed: April 22, 2004
    Publication date: October 28, 2004
    Inventors: Tetsuya Akamatsu, Hiroki Doi, Masanori Inamori
  • Patent number: 6340525
    Abstract: A non-crimping polyester monofilament having an excellent resistance to abrasion and satisfactory mechanical strength and modulus has a intrinsic viscosity distribution such that the farther the location of a part of the monofilament from the longitudinal axis of the monofilament, the lower the intrinsic viscosity of a portion of polyester resin located in the part of the monofilament, wherein a peripheral part of the monofilament formed from a portion of the polyester resin having a lowest average intrinsic viscosity of 0.6 to 1.1 and concentrically surrounds a center part of the monofilament formed from another portion of the polyester resin having a highest average intrinsic viscosity, and the intrinsic viscosities the polyester resin portions for the peripheral and center parts of the monofilament is controlled by controlling the heat history of each of the portions of the polyester resin in a melt spinneret for producing the monofilament.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: January 22, 2002
    Assignee: Teijin Limited
    Inventors: Tetsuya Akamatsu, Chiaki Tashiro
  • Patent number: 5273813
    Abstract: A fabric material that has a high resistance to tearing and is useful for sporting goods utilizing wind pressure, for example, yacht-sails, paragliders and hanggliders, comprises a woven fabric comprising, as a principal fiber component, polyester fibers and satisfies the following specifications:(1) a basic weight of 20 to 100 g/m.sup.2,(2) a tensile strength of 30 kg/5 cm or more,(3) an ultimate elongation of 18% or more,(4) a burst strengh of 0.18 kg/cm.sup.2 or more,(5) a tear strength of 1.0 kg or more, and(6) an air permeability of 1.0 ml/cm.sup.2 /sec or lessand preferably the polyester fibers have an intrinsic viscosity of 0.7 to 0.95, an individual fiber thickness of 1.5 to 3.0 denier, a tensile strength of 6.0 g/d or more, an ultimate elongation of 20% or more, a gradient A of a stress-strain curve at a point on the curve at which the elongation of the fibers is zero, of 1.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: December 28, 1993
    Assignee: Teijin Limited
    Inventors: Tetsuya Akamatsu, Shigeru Takahashi, Katsutoshi Taniguchi