Patents by Inventor Hitoshi Yoshikawa

Hitoshi Yoshikawa 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: 20240151684
    Abstract: A gas sensor element includes: a second ceramic layer including a pump cell in which a first electrode and a second electrode are provided on a surface of a first solid electrolyte body; a first ceramic layer including a measurement chamber which is faced by the first electrode and into which a gas to be measured flows; a porous body covering the second electrode; and a dense layer having a void and not allowing the gas to be measured to pass therethrough. The second electrode and the void are connected through the porous body. A reinforcing layer which is porous and contains, as a main component, a component having a lower firing start temperature than a main component of the porous body is interposed between the second electrode and the porous body at a position overlapping the void in a thickness direction of the porous body.
    Type: Application
    Filed: November 2, 2023
    Publication date: May 9, 2024
    Inventors: Hitoshi FURUTA, Kei YOSHIKAWA
  • Patent number: 11940750
    Abstract: Paper physical property detecting device includes a first detector that measures a sheet of paper (hereinafter, merely referred to as a paper) made to stop temporarily on a conveyance path and acquires a first value corresponding to a first physical property, a second detector that measures a paper while conveying the paper on the conveyance path and acquires a second value corresponding to a second physical property with regard to a physical property different from the first physical property; and a corrector that corrects the first value on a basis of the second value and creates post correction data.
    Type: Grant
    Filed: October 18, 2022
    Date of Patent: March 26, 2024
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiroyuki Yoshikawa, Hitoshi Asano, Yumiko Izumiya, Yasuhiro Koide
  • Publication number: 20240097671
    Abstract: A semiconductor device includes a first transistor, a first drive circuit including a second transistor, and a second drive circuit including a third transistor. The second transistor and the third transistor are connected in series; and a connection node of the second and third transistors is connected to a gate electrode of the first transistor. The first transistor, the second transistor, and the third transistor are normally-off MOS HEMTs formed in a first substrate that includes GaN. The first drive circuit charges a parasitic capacitance of the first transistor. The second drive circuit discharges the parasitic capacitance of the first transistor.
    Type: Application
    Filed: February 10, 2023
    Publication date: March 21, 2024
    Inventors: Toru SUGIYAMA, Noriaki YOSHIKAWA, Yasuhiko KURIYAMA, Akira YOSHIOKA, Hitoshi KOBAYASHI, Hung HUNG, Yasuhiro ISOBE, Tetsuya OHNO, Hideki SEKIGUCHI, Masaaki ONOMURA
  • Patent number: 10371409
    Abstract: A ceiling mounted ventilation fan includes a housing, a fan unit and lighting equipment installed in the housing. The housing including a first opening connected to an air outlet and communicating with a duct, and a second opening that communicates with a room interior. The lighting equipment includes an illumination unit, and a cover, that surrounds the illumination unit, and has a reflecting surface which reflects light from the illumination unit and guides the light into the room. The fan unit includes a fan and a casing positioned at a first position, spaced, from a second position that is above the second opening, the fan casing surrounding the fan and having an air inlet opening directed upwardly. Air is introduced through the second opening and through the air inlet into the fan unit and is discharged through into the duct by the fan unit.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: August 6, 2019
    Assignees: PANASONIC ECOLOGY SYSTEMS GUANGDONG CO., LTD., PANASONIC CORPORATION
    Inventors: Decong Yang, Qianhao Tan, Pingting Yang, Qiuqian Liang, Yannong Wu, Hitoshi Yoshikawa
  • Patent number: 10035897
    Abstract: A dielectric film which has high electrical resistance and excellent durability and a process for producing the dielectric film are provided. Also provided is a transducer which has large displacement and excellent durability. The dielectric film includes a three-dimensional crosslinked body that is synthesized from an organic metal compound, a rubber polymer that is other than a polydimethyl siloxane and has a functional group that is reactive with the organic metal compound, and an inorganic filler that has a functional group that is reactive with the organic metal compound. The transducer is configured by interposing the dielectric film between at least a pair of electrodes.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: July 31, 2018
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Shinji Iio, Shigeaki Takamatsu, Shunsuke Taniguchi, Yota Kokubo, Hitoshi Yoshikawa, Jun Kobayashi
  • Patent number: 9954162
    Abstract: A reactive ionic liquid to be used as an ionic component that is contained in an ion-containing layer in a transducer arranged in contact with a high-resistance layer as a dielectric layer of the transducer, and is restrained from migrating from the ion-containing layer to the high-resistance layer on application of a voltage is provided. The reactive ionic liquid comprises an ion pair that consists of an anion and a cation. (a) The cation (a1) is an imidazolium or quaternary ammonium cation, and (a2) comprises a reactive group that consists of an alkoxysilyl or phosphonate group. (b) The anion (b1) is a sulfonate, sulfonylimide, or nitrobenzoate anion.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: April 24, 2018
    Assignees: SUMITOMO RIKO COMPANY LIMITED, KYUSHU UNIVERSITY
    Inventors: Shigeaki Takamatsu, Yota Kokubo, Kazunobu Hashimoto, Hitoshi Yoshikawa, Atsushi Takahara, Ryousuke Matsuno, Hideyuki Otsuka
  • Patent number: 9903738
    Abstract: A conductive material includes metal nanowires and an extensible copolymer having an N—C?O structure and combined with the metal nanowires. The conductive material has excellent elongation properties and has an electrical resistance that is unlikely to increase even when the conductive material is extended. A method for producing a conductive material includes: a copolymer production step of polymerizing a plurality of monomers including a growth direction control monomer that has an N—C?O structure and controls a growth direction of metal nanowires to produce an extensible copolymer; a reaction step of reacting a metal compound in a solvent containing the copolymer to grow metal nanowires in a longitudinal direction; and an extraction step of extracting a product from the solution after the reaction.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: February 27, 2018
    Assignees: SUMITOMO RIKO COMPANY LIMITED, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Yutaro Taguchi, Hitoshi Yoshikawa, Hidetsugu Torihara, Ryosuke Matsuno, Masaharu Tsuji, Atsushi Takahara
  • Patent number: 9841181
    Abstract: A ventilation fan with illumination includes a housing, a fan, and lighting equipment in the housing. The housing includes a first opening communicating with an air outlet, the first opening communicating with a duct, and a second opening that communicates with an interior space, The lighting equipment includes a light, a cover in the housing that surrounds the light periphery, the cover reflecting light and transmitting the light into the space through the second opening, and a restrictor that restricts passage of air between the light periphery and the lighting cover. An air intake gap is provided between a lower end of the cover and an edge of the second opening and introduced through the second opening and the air intake gap, is discharged through the first opening into the duct, the edge of the second opening being located below the lower end of the cover.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: December 12, 2017
    Assignees: PANASONIC ECOLOGY SYSTEMS GUANGDONG CO., LTD., PANASONIC CORPORATION
    Inventors: Decong Yang, Qianhao Tan, Pingting Yang, Qiuqian Liang, Yannong Wu, Hitoshi Yoshikawa
  • Patent number: 9550865
    Abstract: An ion-immobilized metal oxide particle includes a metal oxide particle and an anion that itself includes a) a reactive group that consists of an alkoxysilyl group and b) an anionic group consisting of a carboxylate (—COO?) group or a sulfonate (—SO3?) group, the anion being immobilized to the metal oxide particle via a silanol group derived from the reactive group. An elastomer includes the ion-immobilized metal oxide particle, and a transducer includes the elastomer.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: January 24, 2017
    Assignees: SUMITOMO RIKO COMPANY LIMITED, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Shigeaki Takamatsu, Ryosuke Matsuno, Shingi Kumagai, Yota Kokubo, Kazunobu Hashimoto, Hitoshi Yoshikawa, Atsushi Takahara, Hideyuki Otsuka
  • Publication number: 20170010018
    Abstract: A ceiling mounted ventilation fan includes a housing, a fan unit and lighting equipment installed in the housing. The housing including a first opening connected to an air outlet and communicating with a duct, and a second opening that communicates with a room interior. The lighting equipment includes an illumination unit, and a cover, that surrounds the illumination unit, and has a reflecting surface which reflects light from the illumination unit and guides the light into the room. The fan unit includes a fan and a casing positioned at a first position, spaced, from a second position that is above the second opening, the fan casing surrounding the fan and having an air inlet opening directed upwardly. Air is introduced through the second opening and through the air inlet into the fan unit and is discharged through into the duct by the fan unit.
    Type: Application
    Filed: September 21, 2016
    Publication date: January 12, 2017
    Applicants: PANASONIC ECOLOGY SYSTEMS GUANGDONG CO., LTD., PANASONIC CORPORATION
    Inventors: Decong YANG, Qianhao TAN, Pingting YANG, Qiuqian LIANG, Yannong WU, Hitoshi YOSHIKAWA
  • Patent number: 9504151
    Abstract: Provided is a conductive film having a high conductivity in which electric resistance is less likely to increase, and a conductive composition for forming the same. The conductive composition includes an elastomer component, a fibrous carbon material having a fiber diameter of less than 30 nm, and a flake-like carbon material having a graphite structure, having an intensity ratio (G/D ratio) of a peak (G band) appearing in the vicinity of 1580 cm?1 to a peak (D band) appearing in the vicinity of 1330 cm?1 of Raman spectrum of not less than 1.8, and having a maximum length of not less than 150 nm and a thickness of not more than 100 nm. The conductive film is formed from the conductive composition.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: November 22, 2016
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Jun Kobayashi, Yusuke Yamashita, Yutaro Taguchi, Hitoshi Yoshikawa
  • Publication number: 20160312002
    Abstract: A dielectric film which has high electrical resistance and excellent durability and a process for producing the dielectric film are provided. Also provided is a transducer which has large displacement and excellent durability. The dielectric film includes a three-dimensional crosslinked body that is synthesized from an organic metal compound, a rubber polymer that is other than a polydimethyl siloxane and has a functional group that is reactive with the organic metal compound, and an inorganic filler that has a functional group that is reactive with the organic metal compound. The transducer is configured by interposing the dielectric film between at least a pair of electrodes.
    Type: Application
    Filed: July 6, 2016
    Publication date: October 27, 2016
    Applicant: Sumitomo Riko Company Limited
    Inventors: Shinji IIO, Shigeaki TAKAMATSU, Shunsuke TANIGUCHI, Yota KOKUBO, Hitoshi YOSHIKAWA, Jun KOBAYASHI
  • Patent number: 9476608
    Abstract: The ceiling mounted ventilation fan with illumination employs a configuration in which a second opening for guiding light from an illumination unit into the room is formed in a lower part of a main housing and in which a air inlet on a fan casing of a fan unit is provided so as to open toward upper part of the main housing. Thus the air inlet of the fan unit opens in a direction opposite to the second opening communicating with inside of the room. As a result, sounds such as operation noises from the fan unit that are transmitted to outside of the fan unit chiefly through the air inlet can be made to resist being transmitted through the second opening into the room, so that the noises can be reduced.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: October 25, 2016
    Assignees: PANASONIC ECOLOGY SYSTEMS GUANGDONG CO., LTD., PANASONIC CORPORATION
    Inventors: Decong Yang, Qianhao Tan, Pingting Yang, Qiuqian Liang, Yannong Wu, Hitoshi Yoshikawa
  • Publication number: 20160111626
    Abstract: A flexible conductive material of the present invention is formed by dispersing a conductive agent containing carbon nanotubes in a matrix that contains a polymer formed by amide bond formation or imide bond formation of a polycyclic aromatic component and an oligomer component and that has a glass transition point of 20° C. or less. The flexible conductive material of the present invention has good dispersibility of a conductive agent containing carbon nanotubes and has an excellent following performance to an expanding and shrinking substrate. A transducer of the present invention includes a dielectric layer made of a polymer, a plurality of electrodes with the dielectric layer interposed therebetween, and wirings connected to the respective electrodes, and at least either the electrodes or the wirings include the flexible conductive material of the present invention.
    Type: Application
    Filed: December 30, 2015
    Publication date: April 21, 2016
    Applicants: Sumitomo Riko Company Limited, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Yusaku TAKAGAKI, Jun KOBAYASHI, Yusuke YAMASHITA, Hitoshi YOSHIKAWA, Naotoshi NAKASHIMA, Atsushi TAKAHARA, Ryosuke MATSUNO
  • Publication number: 20160075835
    Abstract: An ion-immobilized metal oxide particle includes a metal oxide particle and an anion that itself includes a) a reactive group that consists of an alkoxysilyl group and b) an anionic group consisting of a carboxylate (—COO?) group or a sulfonate (—SO3?) group, the anion being immobilized to the metal oxide particle via a silanol group derived from the reactive group. An elastomer includes the ion-immobilized metal oxide particle, and a transducer includes the elastomer.
    Type: Application
    Filed: November 3, 2015
    Publication date: March 17, 2016
    Applicants: SUMITOMO RIKO COMPANY LIMITED, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Shigeaki TAKAMATSU, Ryosuke MATSUNO, Shingi KUMAGAI, Yota KOKUBO, Kazunobu HASHIMOTO, Hitoshi YOSHIKAWA, Atsushi TAKAHARA, Hideyuki OTSUKA
  • Patent number: 9253878
    Abstract: Provided is a conductive composition that has a high conductivity and from which a coating can be formed easily. Also provided is a conductive film that has a high conductivity and in which electric resistance is less likely to increase even during expansion. A conductive composition is prepared by including an elastomer component, a fibrous carbon material having a graphite structure and a fiber diameter of not less than 30 nm, and a conductive carbon black having a structure. A conductive film formed from the conductive composition. The viscosity of the conductive composition formed into a coating with a solid content concentration of not less than 20% by mass, which is measured with a B-type viscometer with an H7 rotor under the conditions of a temperature of 25° C. and a rotation speed of 20 rpm, is not more than 200 Pa·s.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: February 2, 2016
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Jun Kobayashi, Hitoshi Yoshikawa
  • Patent number: 9212263
    Abstract: A reactive ionic liquid to be used as an ionic component that is contained in an ion-containing layer in a transducer arranged in contact with a high-resistance layer as a dielectric layer of the transducer, and is restrained from migrating from the ion-containing layer to the high-resistance layer on application of a voltage is provided. The reactive ionic liquid comprises an ion pair that consists of an anion and a cation. In the reactive ionic liquid, (a) the anion comprises (a1) a reactive group that consists of an alkoxysilyl group and (a2) an anionic group consisting of a carboxylate (—COO?) group or a sulfonate (—SO3?) group. (b) The cation (b1) consists of an imidazolium, ammonium, pyrrolidinium, morpholinium, or phosphonium cation, and (b2) does not comprise an N—H group or a P—H group.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: December 15, 2015
    Assignees: SUMITOMO RIKO COMPANY LIMITED, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Shigeaki Takamatsu, Ryosuke Matsuno, Shingi Kumagai, Yota Kokubo, Kazunobu Hashimoto, Hitoshi Yoshikawa, Atsushi Takahara, Hideyuki Otsuka
  • Patent number: 9136035
    Abstract: A flexible conductive material includes an elastomer, a conductive agent filled in the elastomer, and an adsorbent fixed inside the elastomer and able to adsorb ionic material. With the flexible conductive material, ionized impurities are unlikely to transfer to an adherend such as a dielectric film. Thus, leakage current during application of voltage decreases. Accordingly, by forming an electrode and a wiring with the flexible conductive material, leakage current can be reduced, and a transducer and a flexible wiring board having excellent durability can be produced. In addition, using the flexible conductive material, an electromagnetic shield can be produced having a small leakage current.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: September 15, 2015
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Takamasa Itou, Jun Kobayashi, Hitoshi Yoshikawa
  • Publication number: 20150206465
    Abstract: An expression display device includes an electrostrictive element having a stretched dielectric layer, and electrodes disposed with the dielectric layer interposed therebetween. The dielectric layer has a crosslinked material layer made of a three-dimensional crosslinked material synthesized from a rubber polymer and a metal alkoxide compound or a compound having a hydrosilyl group. The electrodes contain an elastomer and a conductive material. The expression display device displays a facial expression as the dielectric layer extends and contracts according to a voltage that is applied between the electrodes.
    Type: Application
    Filed: March 30, 2015
    Publication date: July 23, 2015
    Applicant: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Hitoshi YOSHIKAWA, Jun KOBAYASHI, Shijie GUO
  • Publication number: 20150202656
    Abstract: A flexible transducer includes: a dielectric layer including a semiconductor-containing layer that contains an elastomer and at least one of an inorganic semiconductor and an organic semiconductor; and a pair of electrodes disposed with the dielectric layer interposed therebetween, and containing a binder and a conductive material. The semiconductor-containing layer has a large dielectric constant and has high insulation properties. According to the flexible transducer, a large voltage can be applied between the electrodes, and a high output can be obtained.
    Type: Application
    Filed: March 31, 2015
    Publication date: July 23, 2015
    Applicant: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Wataru TAKAHASHI, Hitoshi YOSHIKAWA, Shigeaki TAKAMATSU