Patents by Inventor Hirofumi Nakayama

Hirofumi Nakayama 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: 20210009760
    Abstract: A polyamic acid according to one or more embodiments of the present invention contains a structural unit represented by general formula (1) and a structural unit represented by general formula (2). In general formula (1), the plurality of R1s are each independently a hydrogen atom, a monovalent aliphatic group or an aromatic group. In general formula (2), the plurality of R2s are each independently an alkyl group having 1-3 carbon atoms or an aryl group having 6-10 carbon atoms. In general formulas (1) and (2), X is a tetravalent organic group. In general formula (2), the plurality of Ys are each independently an alkylene group having 1-3 carbon atoms or an arylene group having 6-10 carbon atoms, and m is an integer of 51-199.
    Type: Application
    Filed: September 29, 2020
    Publication date: January 14, 2021
    Applicant: KANEKA CORPORATION
    Inventors: Hirofumi Nakayama, Mari Uno
  • Patent number: 10870254
    Abstract: The present invention is an interlayer film for laminated glass that includes 2 or more resin layers laminated on each other. The interlayer film for laminated glass has a large number of recesses and a large number of protrusions on at least one surface thereof. The recesses each have a groove shape with a continuous bottom. The recesses adjacent to each other are parallel to each other and regularly arranged in a line.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: December 22, 2020
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Hirofumi Kitano, Hiroaki Inui, Taiki Katayama, Manabu Matsumoto, Kazuhiko Nakayama
  • Patent number: 10752512
    Abstract: A general-purpose composite tungsten oxide ultrafine particles capable of producing a dispersion liquid with high productivity while having properties such as good visible light transmittance and shielding light in a near-infrared region, and a composite tungsten oxide ultrafine particle dispersion liquid using the same, wherein a value of an XRD peak top intensity ratio of the composite tungsten oxide ultrafine particles is 0.13 or more when the XRD peak intensity is set to 1, with plane of a silicon powder standard sample (640 c produced by NIST) as a reference.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: August 25, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hirofumi Tsunematsu, Hiroki Nakayama, Takeshi Chonan
  • Publication number: 20200223172
    Abstract: The present invention aims to provide a vehicular windshield having a laminated glass structure in which an interlayer film for laminated glass is interposed between at least a pair of glass plates, which contains few air bubbles remaining between the glass plates and the interlayer film for laminated glass to have an excellent appearance and is less likely to cause ghosting when external rays of light are seen through the vehicular windshield.
    Type: Application
    Filed: March 16, 2020
    Publication date: July 16, 2020
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Hirofumi KITANO, Manabu MATSUMOTO, Kazuhiko NAKAYAMA
  • Patent number: 10632712
    Abstract: The present invention aims to provide a vehicular windshield having a laminated glass structure in which an interlayer film for laminated glass is interposed between at least a pair of glass plates, which contains few air bubbles remaining between the glass plates and the interlayer film for laminated glass to have an excellent appearance and is less likely to cause ghosting when external rays of light are seen through the vehicular windshield.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: April 28, 2020
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Hirofumi Kitano, Manabu Matsumoto, Kazuhiko Nakayama
  • Publication number: 20200102423
    Abstract: A polyamic acid that has a fluorine atom content of 25 wt % or less and an amount of a fluorine-containing diamine in the polyamic acid is 70 mol % or more with respect to 100 mol % of a sum of diamine components. The total number of moles of tetracarboxylic acid component in the polyamic acid is 0.960 times or more and less than 1.000 time total number of moles of diamine component. The polyamic acid preferably has the structural unit represented by formula (1) and the structural unit represented by formula (2). The polyamic acid may contain trans-1,4-cyclohexanediamine as the diamine component.
    Type: Application
    Filed: May 2, 2018
    Publication date: April 2, 2020
    Applicant: KANEKA CORPORATION
    Inventors: Hirofumi NAKAYAMA, Mari UNO
  • Patent number: 10562786
    Abstract: A near-infrared shielding material fine particle dispersion body, a near-infrared shielding body, and a near-infrared shielding laminated structure containing composite tungsten oxide that exhibits more excellent near-infrared shielding function than that of a conventional near-infrared shielding material fine particle dispersion body, near-infrared shielding body, and near-infrared shielding laminated structure, and a method for producing the same. Also, a near-infrared shielding material fine particle dispersion body in which near-infrared shielding material fine particles are dispersed in a solid medium. The near-infrared shielding material fine particles are composite tungsten oxide fine particles containing a hexagonal crystal structure, in which a lattice constant of the composite tungsten oxide fine particles is 7.3850 ? or more and 7.4186 ? or less on the a-axis, and 7.5600 ? or more and 7.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: February 18, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroki Nakayama, Hirofumi Tsunematsu, Takeshi Chonan
  • Patent number: 10533100
    Abstract: Near-infrared shielding material fine particles that exhibit an effect of maintaining a high transmittance in a visible light region while shielding a light in a near-infrared region more efficiently than tungsten oxide and composite tungsten oxide of a conventional technique, and the method for producing the same, and a dispersion liquid containing the near-infrared shielding material fine particles. The near-infrared shielding material fine particles are composite tungsten oxide containing a hexagonal crystal structure, and a lattice constant of the composite tungsten oxide fine particles is 7.3850 ? or more and 7.4186 ? or less on the a-axis, and 7.5600 ? or more and 7.6240 ? or less on the c-axis, and a particle size of the near-infrared shielding material fine particles is 100 nm or less.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: January 14, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroki Nakayama, Hirofumi Tsunematsu, Takeshi Chonan
  • Patent number: 10471686
    Abstract: The present invention aims to provide an interlayer film for a laminated glass capable of exhibiting high deaeration properties even in a nip roll method and hardly forming air bubbles to enable the production of a highly visible laminated glass, and a laminated glass including the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of recesses and a large number of projections on at least one surface, the recesses each having a groove shape with a continuous bottom and being regularly adjacent to each other in parallel with one another, the recesses each having a groove shape with a continuous bottom having a ratio (R/Sm×100) of a radius of rotation R of the bottom to an interval Sm between the recesses of 15% or higher.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: November 12, 2019
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Kazuhiko Nakayama, Hiroaki Inui, Hirofumi Kitano
  • Patent number: 10438866
    Abstract: A heat-insulating sheet includes a heat storage sheet, a first insulating sheet, and a thermally conductive sheet. The heat storage sheet contains a first resin and a plurality of microcapsules containing latent heat storage material and mixed in the form of aggregates with each other. The first insulating sheet has a first face bonded to the heat storage sheet and a second face opposite to the first face. The thermally conductive sheet is bonded to the second face of the first insulating sheet. The content of the microcapsules in the heat storage sheet is falls within a range from 40 wt % to 90 wt %, inclusive. The heat storage sheet includes a layer free from the microcapsules at a portion in contact with the first insulating sheet.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: October 8, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Masafumi Nakayama, Yoshiya Sakaguchi, Hirofumi Yamada
  • Patent number: 10378922
    Abstract: A rotation angle detection apparatus includes a magnet that is provided to a rotating shaft of a rotating body and rotates with the rotating shaft to generate magnetic flux and a magnetic sensor that is provided at a distance from the magnet and detects a magnetic flux interlinked with the magnetic sensor. The rotation angle detection apparatus has a magnet magnetic flux detection circuit that detects a magnet magnetic flux generated from the magnet, a disturbance magnetic flux detection circuit that detects a disturbance magnetic flux, which is a magnetic flux other than the magnet magnetic flux and is interlinked with the magnetic sensor, and a correction circuit that corrects a result of detection of the magnetic sensor based on a result of detection of the magnet magnetic flux detection circuit and a result of detection of the disturbance magnetic flux detection circuit.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: August 13, 2019
    Assignee: DENSO CORPORATION
    Inventors: Takuya Kawamura, Hirofumi Kinjou, Toru Wakimoto, Hideaki Nakayama, Masataka Yoshimura
  • Publication number: 20190218697
    Abstract: Disclosed herein is a method for manufacturing a polishing pad, including the step of filling the interior of bundles of ultrafine fibers which have an average fineness of from 0.01 to 0.8 dtex with a polymeric elastomer having a glass transition temperature of ?10° C. or below, storage moduli at 23° C. and 50° C. of from 90 to 900 MPa, and a water absorption ratio, when saturated with water at 50° C. of from 0.2 to 5 mass %. Also disclosed herein are polishing pads obtained by the method above.
    Type: Application
    Filed: March 28, 2019
    Publication date: July 18, 2019
    Applicant: KURARAY CO., LTD.
    Inventors: Kimio NAKAYAMA, Nobuo TAKAOKA, Mitsuru KATO, Hirofumi KIKUCHI
  • Patent number: 9254938
    Abstract: A packaging container with an opening and closing lid, an opening is cut in an edge of the lid-raising member of a rear-side plate on a side of a lid-raising member of the inner case. A stopper is formed on part of the incision opening. An upper end edge of the stopper is an incision edge of the opening arranged at the lowest position of descent of an outer-case locking member and lower than a height position of inner-case locking member. The stopper approaches the outer-case locking member as the inner case moves upward. The outer-case locking member has at least a part of a stopper-corresponding portion in contact against the incision edge being the stopper, so that the outer-case locking member, which moves downward relative to the upward movement of the inner case, is in contact against the part that is the lowest position of descent thereof.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: February 9, 2016
    Assignee: JAPAN TOBACCO INC.
    Inventors: Shinichi Iwata, Hirofumi Nakayama
  • Publication number: 20150014404
    Abstract: A packaging container with an opening and closing lid, an opening is cut in an edge of the lid-raising member of a rear-side plate on a side of a lid-raising member of the inner case. A stopper is formed on part of the incision opening. An upper end edge of the stopper is an incision edge of the opening arranged at the lowest position of descent of an outer-case locking member and lower than a height position of inner-case locking member. The stopper approaches the outer-case locking member as the inner case moves upward. The outer-case locking member has at least a part of a stopper-corresponding portion in contact against the incision edge being the stopper, so that the outer-case locking member, which moves downward relative to the upward movement of the inner case, is in contact against the part that is the lowest position of descent thereof.
    Type: Application
    Filed: July 31, 2014
    Publication date: January 15, 2015
    Inventors: Shinichi IWATA, Hirofumi NAKAYAMA
  • Patent number: 8298307
    Abstract: An abrasive that can impart a mirror finish, glossiness, or the like to a surface of a workpiece by blasting is provided. A crosslinked polyrotaxane compound having a network structure where crosslinking points are circular molecules of polyrotaxane and also having abrasive grains dispersedly mixed therein is obtained by causing chemical bonding between the circular molecules of the polyrotaxane in a state where the abrasive grains and the polyrotaxane are mixed. Then, the crosslinked polyrotaxane compound is granulated to a predetermined grain diameter to obtain a gel-like abrasive where a part of the dispersedly mixed abrasive grain is exposed at the surface. By using the thus-obtained gel-like abrasive in blasting by projecting the abrasive at an angle tilted with respect to a surface of a workpiece, mirror finishing or the like is possible without making the surface of the workpiece pearskin-like.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: October 30, 2012
    Assignee: Fuji Manufacturing Co., Ltd.
    Inventors: Keiji Mase, Shozo Ishibashi, Hirofumi Nakayama, Changming Zhao, Christian Ruslim
  • Publication number: 20110005142
    Abstract: An abrasive that can impart a mirror finish, glossiness, or the like to a surface of a workpiece by blasting is provided. A crosslinked polyrotaxane compound having a network structure where crosslinking points are circular molecules of polyrotaxane and also having abrasive grains dispersedly mixed therein is obtained by causing chemical bonding between the circular molecules of the polyrotaxane in a state where the abrasive grains and the polyrotaxane are mixed. Then, the crosslinked polyrotaxane compound is granulated to a predetermined grain diameter to obtain a gel-like abrasive where a part of the dispersedly mixed abrasive grain is exposed at the surface. By using the thus-obtained gel-like abrasive in blasting by projecting the abrasive at an angle tilted with respect to a surface of a workpiece, mirror finishing or the like is possible without making the surface of the workpiece pearskin-like.
    Type: Application
    Filed: March 4, 2009
    Publication date: January 13, 2011
    Inventors: Keiji Mase, Shozo Ishibashi, Hirofumi Nakayama, Changming Zhao, Christian Ruslim
  • Publication number: 20080262146
    Abstract: It is an object of the present invention to provide a resin composition that is used as an optical material and has a low change in birefringence with external force, and a molding thereof. According to the present invention, there is provided a resin composition comprising an acrylic resin (a) and an aliphatic polyester resin (b).
    Type: Application
    Filed: January 13, 2006
    Publication date: October 23, 2008
    Applicant: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Jun Yonezawa, Tatsuya Yamazaki, Hiroshi Shirai, Hirofumi Nakayama
  • Patent number: 4982316
    Abstract: A polyphase full-wave rectifying circuit that is connected to a polyphase AC line having a neutral point includes DC output terminals and plural pairs of rectifying elements. Each pair is composed of two rectifying elements in series and these pairs are connected in parallel with each other between the DC output terminals. One of the pairs of rectifying elements is a pair of Zener type rectifying elements and the interconnection point of this pair is to the neutral point of the polyphase AC line. The other pairs are pairs of ordinary type rectifying elements, each interconnection point of these pairs is to each phase point of the polyphase AC line. Both internal surges and external surges are absorbed through the pair of Zener type elements. Therefore, the clamping voltages of the internal and external surges results in the same level, being twice as high as the Zener voltage. The peak voltage applied to one Zener type element reduces by half the surge peak voltage.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: January 1, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hirofumi Nakayama
  • Patent number: D520466
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: May 9, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenji Kamiya, Hirofumi Nakayama, Yuji Abe, Taizou Hukuhara, Katsuhiro Okazawa
  • Patent number: D468638
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: January 14, 2003
    Assignees: Toppan Printing Co., Ltd., Meiji Seika Kaisha Ltd.
    Inventors: Tatsuya Nogami, Hirofumi Nakayama, Masato Takahashi