Patents by Inventor Yoshihiro Iwasaki

Yoshihiro Iwasaki 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: 20240084075
    Abstract: Provided is a resin composition capable of being turned into a cured product having a high glass-transition temperature and excellent dielectric properties as well. The resin composition is a heat-curable bismaleimide resin composition containing: (A) a bismaleimide compound represented by the following formula (1) wherein A independently represents a tetravalent organic group having 4 to 200 carbon atoms, B independently represents a divalent organic group having 2 to 200 carbon atoms, n is 2 to 100, and wherein A and/or B has therein a fluorene frame represented by the following formula (2) wherein each of R1, R2, R3 and R4 independently represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a (hetero)aryl group having 4 to 10 carbon atoms, a hydroxyl group, an alkoxy group, a halogeno group, an amino group, or a sulfenyl group; and (B) a reaction accelerator.
    Type: Application
    Filed: July 19, 2023
    Publication date: March 14, 2024
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Masayuki IWASAKI, Yoshihiro TSUTSUMI, Naoko TANINAKA
  • Publication number: 20230271881
    Abstract: The present invention relates to a layered formed sheet comprising two or more formed sheets each formed from a curable composition comprising (A) an aluminosilicate source, (B) an alkaline metal hydroxide, (C) cellulose-based fibers and (D) alkali-resistant fibers other than cellulose-based fibers, in which the aluminosilicate source (A) comprises a blast furnace slag, and the content of a blast furnace slag having a specific surface area of 1000 cm2/g or more and 9000 cm2/g or less is more than 55% by mass and 90% by mass or less related to a total solid content in the curable composition.
    Type: Application
    Filed: June 28, 2021
    Publication date: August 31, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Yoshinori HITOMI, Akira IMAGAWA, Takafumi HORIKOSHI, Atsuhisa OGAWA, Yoshihiro IWASAKI, Hisashi SUEMORI, Yoshihiro HIGASHIMOTO
  • Publication number: 20230250023
    Abstract: The present invention relates to a cured composite comprising (A) an aluminosilicate source, (B) an alkali activator and (C) alkali-resistant fibers, in which: the aluminosilicate source (A) contains a blast furnace slag, in which the content of the blast furnace slag is 40% by mass or more relative to a total solid content in the aluminosilicate source (A); the content of the alkali activator (B) is 10% by mass or less relative to a total solid content in the curable composition; and the water content in the cured composite is 10.0% by mass or less relative to a total mass of the cured composite.
    Type: Application
    Filed: June 28, 2021
    Publication date: August 10, 2023
    Applicant: KURARAY CO., LTD.
    Inventors: Takafumi HORIKOSHI, Akira IMAGAWA, Yoshihiro IWASAKI, Hisashi SUEMORI, Atsuhisa OGAWA, Yoshihiro HIGASHIMOTO
  • Publication number: 20220064824
    Abstract: The present invention relates to a bundled yarn, comprising plural fibers integrated by a sizing agent, wherein the sizing agent is a modified polyvinyl alcohol comprising a structural unit (X) derived from an unsaturated carboxylic acid or derivative thereof in an amount of 0.1 to 10% by mole, taking the amount of all monomer units as 100% by mole, which modified polyvinyl alcohol has a saponification degree of 85% by mole or higher.
    Type: Application
    Filed: December 6, 2019
    Publication date: March 3, 2022
    Applicant: KURARAYCO., LTD.
    Inventors: Akira IMAGAWA, Takafumi HORIKOSHI, Hisashi SUEMORI, Yoshihiro IWASAKI
  • Publication number: 20210348327
    Abstract: The present invention relates to a composite sheet comprising a woven fabric consisting of liquid crystal polyester fiber in which one side or both sides of the woven fabric is coated with a coating material comprising a thermoplastic resin, wherein a tensile strength of the composite sheet in a warp direction of the woven fabric is 300 N/cm or more, and wherein a ratio of a mass of the thermoplastic resin to a mass of the woven fabric is 5 to 25% by mass.
    Type: Application
    Filed: October 18, 2019
    Publication date: November 11, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Ushio SUZUKI, Tetsuya WATANABE, Yuichiro HATTORI, Junya IDE, Shunsuke SUIKO, Tomoaki HARII, Fumio TONOMORI, Yoshihiro IWASAKI, Toshihiro MIYAYAMA, Hiroki GENTSU
  • Patent number: 10851545
    Abstract: A concrete tile comprising a tile body, the tile body having an upper face hardened through non-mold shaping, a lower face hardened through mold shaping, and a side surface that includes a cut end face in at least one side of the tile body, wherein the tile body contains alkali-resistant fiber in an entire thickness thereof in a state substantially free of fiber-containing granular bodies; the alkali-resistant fibers comprise at least one member selected from the group consisting of polyvinyl alcohol-based fibers, polyethylene fibers, polypropylene fibers, acrylic fibers, and aramid fibers; and a flexural strength of a 30 mm×150 mm sized cut piece of the tile body is not less than 6 N/mm2.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: December 1, 2020
    Assignee: Kuraray Co., Ltd.
    Inventors: Akira Imagawa, Shinya Inada, Yoshihiro Iwasaki, Saburo Hada
  • Patent number: 10604447
    Abstract: A roof tile containing fibers which satisfy the following requirements (1) to (3): (1) to have an average fiber diameter of 50 ?m or less; (2) to have an aspect ratio of 50 to 2000; and (3) to have three or less buckled portions per fiber.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: March 31, 2020
    Assignee: KURARAY CO, LTD.
    Inventors: Akira Imagawa, Shinya Inada, Yoshihiro Iwasaki, Saburo Hada
  • Publication number: 20200002590
    Abstract: A heat storage particle that includes a ceramic particle containing a vanadium oxide as a main component thereof, and a metal film covering the ceramic particle.
    Type: Application
    Filed: August 7, 2019
    Publication date: January 2, 2020
    Inventors: Kou Tanaka, Yuji Yokoyama, Mitsugu Takada, Ryo Teraura, Mitsunari Imasaka, Noboru Tanida, Toshihiko Yamada, Yoshihiro Iwasaki
  • Patent number: 10462547
    Abstract: A sound transmission system that includes a sound transmission device that is brought into contact with a human body and a sound signal generation device connected to the sound transmission device. The sound transmission device includes an insulator that is brought into contact with the human body, a conductor that is in contact with the insulator, and an input that is provided on the conductor and inputs a driving voltage. One end of the sound signal generation device is connected to the input, and the sound signal generation device supplies the driving voltage based on a sound signal to the sound transmission device.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: October 29, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Shuichi Kawata, Yoshihiro Iwasaki, Shinsuke Shichi, Yasutada Tanimoto, Kazuya Nakatera, Yoshiaki Katagiri
  • Patent number: 10093577
    Abstract: Provided is a fiber-reinforced carbonated hydraulic inorganic molded plate having a high bulk specific gravity, a high flexural strength, and a small dimensional change rate per specific gravity. (1) A fiber-reinforced carbonated hydraulic inorganic molded plate including: a cement component, a pulp, and a reinforcing fiber having an aspect ratio in a range of 40 to 1000; and being a carbonation-cured molded plate. (2) A molded plate being a cured product of a composition including at least a cement component, a pulp, and a reinforcing fiber, wherein the molded plate is a fiber-reinforced carbonated hydraulic inorganic molded plate and has a carbonation reaction rate of higher than or equal to 30%.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: October 9, 2018
    Assignee: KURARAY CO., LTD.
    Inventors: Yoshinori Hitomi, Shinya Inada, Yoshihiro Iwasaki, Hiroaki Noritake, Saburo Hada, Minoru Morioka, Takayuki Higuchi, Makoto Shoji, Katsuaki Iriuchijima
  • Publication number: 20180192178
    Abstract: A sound transmission system that includes a sound transmission device that is brought into contact with a human body and a sound signal generation device connected to the sound transmission device. The sound transmission device includes an insulator that is brought into contact with the human body, a conductor that is in contact with the insulator, and an input that is provided on the conductor and inputs a driving voltage. One end of the sound signal generation device is connected to the input, and the sound signal generation device supplies the driving voltage based on a sound signal to the sound transmission device.
    Type: Application
    Filed: February 28, 2018
    Publication date: July 5, 2018
    Inventors: SHUICHI KAWATA, Yoshihiro Iwasaki, Shinsuke Shichi, Yasutada Tanimoto, Kazuya Nakatera, Yoshiaki Katagiri
  • Publication number: 20170369370
    Abstract: A roof tile containing fibers which satisfy the following requirements (1) to (3): (1) to have an average fiber diameter of 50 ?m or less; (2) to have an aspect ratio of 50 to 2000; and (3) to have three or less buckled portions per fiber.
    Type: Application
    Filed: December 24, 2015
    Publication date: December 28, 2017
    Applicant: KURARAY CO., LTD.
    Inventors: Akira IMAGAWA, Shinya INADA, Yoshihiro IWASAKI, Saburo HADA
  • Publication number: 20160289119
    Abstract: Provided is a fiber-reinforced carbonated hydraulic inorganic molded plate having a high bulk specific gravity, a high flexural strength, and a small dimensional change rate per specific gravity. (1) A fiber-reinforced carbonated hydraulic inorganic molded plate including: a cement component, a pulp, and a reinforcing fiber having an aspect ratio in a range of 40 to 1000; and being a carbonation-cured molded plate. (2) A molded plate being a cured product of a composition including at least a cement component, a pulp, and a reinforcing fiber, wherein the molded plate is a fiber-reinforced carbonated hydraulic inorganic molded plate and has a carbonation reaction rate of higher than or equal to 30%.
    Type: Application
    Filed: May 3, 2016
    Publication date: October 6, 2016
    Applicant: KURARAY CO., LTD.
    Inventors: Yoshinori HITOMI, Shinya INADA, Yoshihiro IWASAKI, Hiroaki NORITAKE, Saburo HADA, Minoru MORIOKA, Takayuki HIGUCHI, Makoto SHOJI, Katsuaki IRIUCHIJIMA
  • Publication number: 20160237686
    Abstract: A concrete tile comprising a tile body, the tile body having an upper face hardened through non-mold shaping, a lower face hardened through mold shaping, and a side surface that includes a cut end face in at least one side of the tile body, wherein the tile body contains alkali-resistant fiber in an entire thickness thereof in a state substantially free of fiber-containing granular bodies; the alkali-resistant fibers comprise at least one member selected from the group consisting of polyvinyl alcohol-based fibers, polyethylene fibers, polypropylene fibers, acrylic fibers, and aramid fibers; and a flexural strength of a 30 mm×150 mm sized cut piece of the tile body is not less than 6 N/mm2.
    Type: Application
    Filed: April 28, 2016
    Publication date: August 18, 2016
    Applicant: Kuraray Co., Ltd.
    Inventors: Akira IMAGAWA, Shinya INADA, Yoshihiro IWASAKI, Saburo HADA
  • Patent number: 8647741
    Abstract: The present invention aims to provide a polypropylene fiber (PP fiber) excellent in strength, heat resistance, and water-absorption properties, a method of producing the same, and a hydraulic composition, a rope, a sheet-shaped fiber structure, and a composite material with an organic polymer each using the PP fiber. The present invention provides: a PP fiber having a fiber having a fiber strength of 7 cN/dtex or more and having either or both of (i) DSC properties such that the endothermic peak shape by DSC is a single shape having a half width of 10° C. or lower and the melt enthalpy change (AH) is 125 J/ g and (ii) irregular properties such that the single fiber fineness is 0.i to 3 dtex and irregularities are formed on the surface.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: February 11, 2014
    Assignee: Kuraray Co., Ltd.
    Inventors: Takashi Katayama, Yoshihiro Iwasaki, Masakazu Nishiyama
  • Patent number: 8410869
    Abstract: In an elastic-wave filter device that includes a band-pass filter and a band-eliminate filter connected to the band-pass filter, insertion loss in a pass band is significantly reduced and attenuation in a stop band is significantly increased. The elastic-wave filter device has a pass band and a stop band at frequencies higher than the pass band. The band-pass filter and the first band-eliminate filter are connected in series between an input terminal and an output terminal. A first parallel-arm resonator of the first band-eliminate filter includes a first resonance frequency in the stop band. A second parallel-arm resonator includes a second resonance frequency in the stop band, the second resonance frequency being higher than the first resonance frequency. An impedance value of the first parallel-arm resonator is larger than an impedance value of the second parallel-arm resonator.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: April 2, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Katsuhito Omote, Yoshihiro Iwasaki
  • Publication number: 20120306595
    Abstract: In an elastic-wave filter device that includes a band-pass filter and a band-eliminate filter connected to the band-pass filter, insertion loss in a pass band is significantly reduced and attenuation in a stop band is significantly increased. The elastic-wave filter device has a pass band and a stop band at frequencies higher than the pass band. The band-pass filter and the first band-eliminate filter are connected in series between an input terminal and an output terminal. A first parallel-arm resonator of the first band-eliminate filter includes a first resonance frequency in the stop band. A second parallel-arm resonator includes a second resonance frequency in the stop band, the second resonance frequency being higher than the first resonance frequency. An impedance value of the first parallel-arm resonator is larger than an impedance value of the second parallel-arm resonator.
    Type: Application
    Filed: August 20, 2012
    Publication date: December 6, 2012
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Katsuhito OMOTE, Yoshihiro IWASAKI
  • Publication number: 20100173547
    Abstract: The present invention aims to provide a polypropylene fiber (PP fiber) excellent in strength, heat resistance, and water-absorption properties, a method of producing the same, and a hydraulic composition, a rope, a sheet-shaped fiber structure, and a composite material with an organic polymer each using the PP fiber. The present invention provides: a PP fiber having a fiber strength of 7 cN/dtex or more and having either or both of (i) DSC properties such that the endothermic peak shape by DSC is a single shape having a half width of 10° C. or lower and the melt enthalpy change (AH) is 125 J/g and (ii) irregular properties such that the single fiber fineness is 0.1 to 3 dtex and irregularities are formed on the surface, the irregularities having an average interval of 6.5 to 20 ?m and an average height of 0.
    Type: Application
    Filed: March 24, 2008
    Publication date: July 8, 2010
    Applicant: KURARAY CO., LTD.
    Inventors: Takashi Katayama, Yoshihiro Iwasaki, Masakazu Nishiyama
  • Patent number: 6687139
    Abstract: Provided are, a converter section (30) which converts a commercial AC voltage (VAC) into a DC voltage (VDC); an inverter section (60) which converts the DC voltage (VDC) into an output AC voltage (VOUT) of a predetermined frequency by a pulse-width modulation system based on an assigned PWM width, and supplies the output AC voltage (VOUT) to a compressor motor (70). Further, an instantaneous DC voltage detecting section (50) detects an instantaneous DC voltage (VDCS); and an arithmetic processing section (100) corrects the PWM width so as to maintain the output AC voltage (VOUT) at a desired value following the variation in the instantaneous DC voltage (VDCS). It is possible to operate a compressor motor (70) in an optimum state of load characteristics and efficiency.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: February 3, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Makoto Tanikawa, Takahiro Ishigami, Yoshihiko Kikkawa, Hitoshi Tanifuji, Yoshihiro Iwasaki, Hiroaki Suzuki, Isao Kawasaki, Ichiro Minejima
  • Publication number: 20010036093
    Abstract: Provided are, a converter section (30) which converts a commercial AC voltage (VAC) into a DC voltage (VDC); an inverter section (60) which converts the DC voltage (VDC) into an output AC voltage (VOUT) of a predetermined frequency by a pulse-width modulation system based on an assigned PWM width, and supplies the output AC voltage (VOUT) to a compressor motor (70). Further, an instantaneous DC voltage detecting section (50) detects an instantaneous DC voltage (VDCS); and an arithmetic processing section (100) corrects the PWM width so as to maintain the output AC voltage (VOUT) at a desired value following the variation in the instantaneous DC voltage (VDCS). It is possible to operate a compressor motor (70) in an optimum state of load characteristics and efficiency.
    Type: Application
    Filed: May 24, 2001
    Publication date: November 1, 2001
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Makoto Tanikawa, Takahiro Ishigami, Yoshihiko Kikkawa, Hitoshi Tanifuji, Yoshihiro Iwasaki, Hiroaki Suzuki, Isao Kawasaki, Ichiro Minejima