Patents by Inventor Keisuke Hirano

Keisuke Hirano 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: 11319462
    Abstract: The pressure sensitive adhesive sheet is a sheet shaped pressure sensitive adhesive including an acryl-based base polymer. The acryl-based base polymer contains an acryl-based segment and a urethane-based segment, and a content of the urethane-based segment is 3 to 30 parts by weight based on 100 parts by weight of the acryl-based segment. The urethane-based segment includes at least one urethane chain selected from the group consisting of a polyether urethane and a polyester urethane. The content of the urethane-based segment other than the polyether urethane-based segment is 15 parts by weight or less based on 100 parts by weight of the acryl-based segment.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: May 3, 2022
    Assignee: NITTO DENKO CORPORATION
    Inventors: Itsuhiro Hatanaka, Masahito Niwa, Taiki Shimokuri, Shou Takarada, Takahiro Nonaka, Keisuke Hirano, Fumika Kawatake, Mika Ikemura
  • Patent number: 11319470
    Abstract: A pressure sensitive adhesive includes an acryl-based base polymer. The acryl-based base polymer contains an acryl-based segment and a urethane-based segment. In the acryl-based base polymer, the content of the urethane-based segment is 3 to 20 parts by weight based on 100 parts by weight of the acryl-based segment. A pressure sensitive adhesive sheet can be obtained by applying a pressure sensitive adhesive composition on a substrate in a layer form. The pressure sensitive adhesive composition may be curable and may include a polymerization initiator. In formation of the pressure sensitive adhesive sheet, the curable pressure sensitive adhesive composition may be, as necessary.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: May 3, 2022
    Assignee: NITTO DENKO CORPORATION
    Inventors: Masahito Niwa, Itsuhiro Hatanaka, Taiki Shimokuri, Shou Takarada, Takahiro Nonaka, Keisuke Hirano, Fumika Kawatake, Mika Ikemura
  • Publication number: 20220025223
    Abstract: A pressure-sensitive adhesive composition contains an adhesive component and gas-generative particles dispersed in the adhesive component. When the gas-generative particles are subjected to particle size distribution measurement, in the particle size distribution of the gas-generative particles, a cumulative particle size (D90) where a cumulative value from the smallest particle size is 90% based on volume is 10.0 ?m or less.
    Type: Application
    Filed: December 9, 2019
    Publication date: January 27, 2022
    Applicant: NITTO DENKO CORPORATION
    Inventors: Mizuho NAGATA, Yu TACHIKAWA, Keisuke HIRANO, Kiichiro MATSUSHITA
  • Publication number: 20220017789
    Abstract: A pressure-sensitive adhesive composition includes a pressure-sensitive adhesive component and a gas generating particle dispersed in the pressure-sensitive adhesive component. A tensile elastic modulus at 25° C. of the pressure-sensitive adhesive composition is 5 MPa or less. A gas generation amount at which the gas generating particle is generated in the pressure-sensitive adhesive composition is 5 mL/g or more in terms of decane at 0° C. and 1013 hPa in a solid content of the pressure-sensitive adhesive composition.
    Type: Application
    Filed: November 12, 2019
    Publication date: January 20, 2022
    Applicant: NITTO DENKO CORPORATION
    Inventors: Mizuho NAGATA, Yu TACHIKAWA, Keisuke HIRANO, Kiichiro MATSUSHITA
  • Publication number: 20200163662
    Abstract: A developing body includes: an excluding portion including a movable wire and fixing wires arranged around the movable wire, a distal end of the movable wire and distal ends of the fixing wires being connected to each other; an insertion tube allowing the movable wire to pass therethrough; and a restriction member that is connected to a proximal end of the movable wire. The restriction member restricts the movement of the movable wire when the restriction member abuts against the first grip portion. When the first grip portion and the second grip portion are moved relative to each other so as to be close to each other in this state, the excluding portion is developed by bringing the distal end of the insertion tube and the distal end of the movable wire to be close to each other to deflect the fixing wire.
    Type: Application
    Filed: July 5, 2018
    Publication date: May 28, 2020
    Inventors: Kiyokazu Nakajima, Suekatsu Fujimoto, Keisuke Hirano
  • Publication number: 20190233681
    Abstract: A pressure sensitive adhesive includes an acryl-based base polymer. The acryl-based base polymer contains an acryl-based segment and a urethane-based segment. In the acryl-based base polymer, the content of the urethane-based segment is 3 to 20 parts by weight based on 100 parts by weight of the acryl-based segment. A pressure sensitive adhesive sheet can be obtained by applying a pressure sensitive adhesive composition on a substrate in a layer form. The pressure sensitive adhesive composition may be curable and may include a polymerization initiator. In formation of the pressure sensitive adhesive sheet, the curable pressure sensitive adhesive composition may be, as necessary.
    Type: Application
    Filed: January 29, 2019
    Publication date: August 1, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masahito NIWA, Itsuhiro HATANAKA, Taiki SHIMOKURI, Shou TAKARADA, Takahiro NONAKA, Keisuke HIRANO, Fumika KAWATAKE, Mika IKEMURA
  • Publication number: 20190233683
    Abstract: The pressure sensitive adhesive sheet is a sheet shaped pressure sensitive adhesive including an acryl-based base polymer. The acryl-based base polymer contains an acryl-based segment and a urethane-based segment, and a content of the urethane-based segment is 3 to 30 parts by weight based on 100 parts by weight of the acryl-based segment. The urethane-based segment includes at least one urethane chain selected from the group consisting of a polyether urethane and a polyester urethane. The content of the urethane-based segment other than the polyether urethane-based segment is 15 parts by weight or less based on 100 parts by weight of the acryl-based segment.
    Type: Application
    Filed: January 29, 2019
    Publication date: August 1, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Itsuhiro HATANAKA, Masahito NIWA, Taiki SHIMOKURI, Shou TAKARADA, Takahiro NONAKA, Keisuke HIRANO, Fumika KAWATAKE, Mika IKEMURA
  • Patent number: 10139525
    Abstract: There is provided an optical laminate excellent which secures adhesiveness between the (meth)acrylic resin film (base material film) and a hard coat layer, and can prevent a reduction in scratch resistance. An optical laminate according to an embodiment of the present invention includes: a base material layer formed of a (meth)acrylic resin film; a hard coat layer formed by applying, to the (meth)acrylic resin film, a composition for forming a hard coat layer containing a curable compound and inorganic nanoparticles; and a penetration layer having a thickness of 1.2 ?m or more, the penetration layer being formed between the base material layer and the hard coat layer by penetration of the composition for forming a hard coat layer into the (meth)acrylic resin film, wherein a content of the inorganic nanoparticles is 1.5 wt % to 50 wt % with respect to a total of the curable compound and the inorganic nanoparticles.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: November 27, 2018
    Assignee: NITTO DENKO CORPORATION
    Inventors: Shusaku Shibata, Katsunori Takada, Hiroyuki Takemoto, Keisuke Hirano
  • Patent number: 9707742
    Abstract: There is provided a flame-resistant composite member exhibiting remarkably high flame resistance even if having a flammable base material. The flame-resistant composite member according to the present invention has a film formed of a silicone resin composition (C) containing at least an inorganic oxide particle-containing condensation-reactive silicone resin on at least one surface of a base material. The inorganic oxide particle-containing condensation-reactive silicone resin may be a condensation-reactive silicone resin (A) including a crosslinked structural body wherein an inorganic oxide particle dispersed in a polysiloxane resin having a condensation-reactive group and the polysiloxane resin are crosslinked through a chemical bond. The silicone resin composition (C) may contain the condensation-reactive silicone resin (A) and an inorganic particle (B).
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: July 18, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Kohei Doi, Kunio Nagasaki, Yusuke Sugino, Takafumi Hida, Yusuke Nakayama, Keisuke Hirano
  • Patent number: 9598555
    Abstract: The present invention relates to a flame retardant material including: a silicone resin; and a flame retardant filler, in which the silicone resin is at least one selected from the group consisting of an addition type silicone resin, a self-crosslinking type silicone resin, a silicone resin component of a silicone rubber film-forming type emulsion and a silicone rubber powder.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: March 21, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventor: Keisuke Hirano
  • Patent number: 9382402
    Abstract: The flame-retardant silicone resin composition of the present invention comprises: an inorganic oxide particle-containing condensation-reactive silicone resin (A) comprising a crosslinking structure in which inorganic oxide particles dispersed in a polysiloxane resin having a condensation-reactive group are crosslinked with the polysiloxane resin by chemical bonds; and inorganic particles (B). The inorganic oxide particles are preferably at least one type of inorganic oxide particles selected from the group consisting of silica, alumina, glass frit, and antimony-doped tin oxide.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: July 5, 2016
    Assignee: NITTO DENKO CORPORATION
    Inventors: Kohei Doi, Kunio Nagasaki, Yusuke Sugino, Takafumi Hida, Yusuke Nakayama, Keisuke Hirano
  • Publication number: 20150376366
    Abstract: The present invention relates to a flame retardant material including: a silicone resin; and a flame retardant filler, in which the silicone resin is at least one selected from the group consisting of an addition type silicone resin, a self-crosslinking type silicone resin, a silicone resin component of a silicone rubber film-forming type emulsion and a silicone rubber powder.
    Type: Application
    Filed: June 25, 2015
    Publication date: December 31, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventor: Keisuke HIRANO
  • Patent number: 9159902
    Abstract: A resonator includes an interdigital transducer electrode, a resonance part, a supporting part, and two beam parts. The interdigital transducer electrode is disposed on a piezoelectric thin film. The resonance part is held on a substrate through an air gap. The supporting part supports the resonance part. The two beam parts connect the resonance part to the supporting part at both ends of the resonance part. The air gap forms a level difference at the supporting part or level differences at the respective two beam parts.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: October 13, 2015
    Assignee: NIHON DEMPA KOGYO CO., LTD.
    Inventors: Keisuke Hirano, Noritoshi Kimura
  • Patent number: 9053846
    Abstract: There are provided a permanent magnet and a manufacturing method thereof enabling carbon content contained in magnet particles to be reduced in advance before sintering even when wet milling is employed. Coarsely-milled magnet powder is further milled by a bead mill in a solvent together with an organometallic compound expressed with a structural formula of M?(OR)x (M includes at least one of neodymium, praseodymium, dysprosium and terbium, each being a rare earth element, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, x represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the magnet powder. Thereafter, a compact body of compacted magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius to perform hydrogen calcination process. Thereafter, through sintering process, a permanent magnet 1 is manufactured.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: June 9, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Izumi Ozeki, Katsuya Kume, Keisuke Hirano, Tomohiro Omure, Keisuke Taihaku, Takashi Ozaki
  • Patent number: 9048014
    Abstract: There are provided a permanent magnet and a manufacturing method thereof capable of decreasing an activity level of a calcined body activated by a calcination process. To fine powder of milled neodymium magnet is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M?(OR)x (M represents Dy or Tb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, x represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, desiccated magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius. Thereafter, the powdery calcined body calcined through the calcination process in hydrogen is held for several hours in vacuum atmosphere at 200 through 600 degrees Celsius for a dehydrogenation process.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: June 2, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Izumi Ozeki, Katsuya Kume, Keisuke Hirano, Tomohiro Omure, Keisuke Taihaku, Toshinobu Hoshino, Takashi Ozaki
  • Patent number: 9039920
    Abstract: There are provided a permanent magnet and a manufacturing method thereof enabling carbon content contained in magnet particles to be reduced in advance before sintering even when wet milling is employed. Coarsely-milled magnet powder is further milled by a bead mill in a solvent together with an organometallic compound expressed with a structural formula of M-(OR)X (M represents V, Mo, Zr, Ta Ti W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, X represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the magnet powder. Thereafter, a compact body of compacted magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius to perform hydrogen calcination process. Thereafter, through sintering process, a permanent magnet 1 is formed.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: May 26, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Izumi Ozeki, Katsuya Kume, Keisuke Hirano, Tomohiro Omure, Keisuke Taihaku, Takashi Ozaki
  • Patent number: 9005374
    Abstract: There are provided a permanent magnet and a manufacturing method thereof capable of decreasing an activity level of a calcined body activated by a calcination process. To fine powder of milled neodymium magnet is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M-(OR)x (M represents V, Mo, Zr, Ta, Ti, W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, x represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, desiccated magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius. Thereafter, the powdery calcined body calcined through the calcination process in hydrogen is held for several hours in vacuum atmosphere at 200 through 600 degrees Celsius for a dehydrogenation process.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: April 14, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Izumi Ozeki, Katsuya Kume, Keisuke Hirano, Tomohiro Omure, Keisuke Taihaku, Takashi Ozaki
  • Publication number: 20150062896
    Abstract: The flame-retardant silicone resin composition of the present invention comprises: an inorganic oxide particle-containing condensation-reactive silicone resin (A) comprising a crosslinking structure in which inorganic oxide particles dispersed in a polysiloxane resin having a condensation-reactive group are crosslinked with the polysiloxane resin by chemical bonds; and inorganic particles (B). The inorganic oxide particles are preferably at least one type of inorganic oxide particles selected from the group consisting of silica, alumina, glass frit, and antimony-doped tin oxide.
    Type: Application
    Filed: April 9, 2013
    Publication date: March 5, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kohei Doi, Kunio Nagasaki, Yusuke Sugino, Takafumi Hida, Yusuke Nakayama, Keisuke Hirano
  • Patent number: 8883922
    Abstract: Provided are a pressure-sensitive adhesive composition that is produced with no tin compound, has a sufficiently long pot life, and can be rapidly crosslinked in the process of forming a pressure-sensitive adhesive layer; and a pressure-sensitive adhesive layer and a pressure-sensitive adhesive sheet each produced using such a pressure-sensitive adhesive composition. A pressure-sensitive adhesive composition, comprising: 100 parts by weight of an acrylic polymer (A) having an active hydrogen-containing functional group; 0.1 parts by weight to 10 parts by weight of an isocyanate crosslinking agent (B); 0.002 parts by weight to 0.5 parts by weight of a catalyst (C) having an iron active center; and a compound (D) capable of undergoing keto-enol tautomerism, wherein the weight ratio (D/C) of the compound (D) capable of undergoing keto-enol tautomerism to the catalyst (C) having an iron active center is from 3 to 70.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: November 11, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Toru Iseki, Keisuke Hirano
  • Publication number: 20140301090
    Abstract: There is provided a flame-resistant composite member exhibiting remarkably high flame resistance even if having a flammable base material. The flame-resistant composite member according to the present invention has a film formed of a silicone resin composition (C) containing at least an inorganic oxide particle-containing condensation-reactive silicone resin on at least one surface of a base material. The inorganic oxide particle-containing condensation-reactive silicone resin may be a condensation-reactive silicone resin (A) including a crosslinked structural body wherein an inorganic oxide particle dispersed in a polysiloxane resin having a condensation-reactive group and the polysiloxane resin are crosslinked through a chemical bond. The silicone resin composition (C) may contain the condensation-reactive silicone resin (A) and an inorganic particle (B).
    Type: Application
    Filed: November 13, 2012
    Publication date: October 9, 2014
    Inventors: Kohei Doi, Kunio Nagasaki, Yusuke Sugino, Takafumi Hida, Yusuke Nakayama, Keisuke Hirano