Patents by Inventor Takeshi Chonan

Takeshi Chonan 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: 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
  • Publication number: 20190185340
    Abstract: A heat ray shielding fine particle dispersion body and a heat ray shielding laminated transparent substrate that as well as exhibit heat ray shielding properties and suppressing a scorching sensation on the skin when used in structures such as window materials and the like, also enable usage of communication devices, imaging devices, sensors and the like that use near-infrared light interposing the heat ray shielding film or the heat ray shielding glass, containing a transparent thermoplastic resin, and wherein heat ray shielding fine particles are dispersed in the transparent thermoplastic resin, the heat ray shielding fine particles having elements L, M, tungsten, and oxygen, and a hexagonal crystal structure represented by a general formula (LAMB) WCOD, wherein the element L is an element selected from K, Rb, Cs, and the element M is one or more elements selected from K, Rb, and Cs and is different from the element L.
    Type: Application
    Filed: June 14, 2017
    Publication date: June 20, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Mika OKADA, Hideaki FUKUYAMA, Takeshi CHONAN
  • Publication number: 20190161361
    Abstract: There is provided a near-infrared absorbing fine particle dispersion liquid containing near-infrared absorbing fine particles, thereby as well as exhibiting near-infrared light absorption properties and suppressing a scorching sensation on the skin when used in structures such as window materials and the like, also enabling usage of communication devices, imaging devices, sensors and the like that employ near-infrared light through these structures, a near-infrared absorbing film or a near-infrared absorbing glass, a dispersion body or a laminated transparent substrate, the dispersion liquid containing at least composite tungsten oxide fine particles and antimony doped tin oxide fine particles and/or tin doped indium oxide fine particles as near-infrared absorbing fine particles, wherein in the composite tungsten oxide fine particles, an average value of a transmittance in a wavelength range of 800 to 900 nm is 30% or more and 60% or less, and an average value of a transmittance in a wavelength range of 1200
    Type: Application
    Filed: May 31, 2017
    Publication date: May 30, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hirofumi TSUNEMATSU, Takeshi CHONAN
  • Publication number: 20190085181
    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: Application
    Filed: March 16, 2017
    Publication date: March 21, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroki NAKAYAMA, Hirofumi TSUNEMATSU, Takeshi CHONAN
  • Publication number: 20190077676
    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: Application
    Filed: March 16, 2017
    Publication date: March 14, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroki NAKAYAMA, Hirofumi TSUNEMATSU, Takeshi CHONAN
  • Publication number: 20190016602
    Abstract: Boride particles represented by a general formula XB, (where X is at least one kind of metal element selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sr, Ca, and m is a number indicating an amount of boron in the general formula) are provided, wherein an amount of carbon included in the boride particles is 0.2% by mass or less, as measured by a combustion-infrared absorption method.
    Type: Application
    Filed: December 28, 2016
    Publication date: January 17, 2019
    Inventors: Kenji FUKUDA, Mitsunobu MIRATSU, Hirofumi TSUNEMATSU, Takeshi CHONAN
  • Publication number: 20190002712
    Abstract: An anti-counterfeit ink composition, an anti-counterfeit ink, and an anti-counterfeit printed matter that transmits a visible light region, having absorption in an infrared region, and capable of judging authenticity of the printed matter, and there is provided an anti-counterfeit ink composition, an anti-counterfeit ink, an anti-counterfeit printed matter, and a method for producing the anti-counterfeit ink composition, wherein a value of an XRD peak top intensity ratio of the composite tungsten oxide ultrafine particles is 0.13 or more when a value of the XRD peak intensity is set to 1, with plane of a silicon powder standard sample (640c produced by NIST) as a reference.
    Type: Application
    Filed: December 19, 2016
    Publication date: January 3, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hirofumi TSUNEMATSU, Takeshi CHONAN
  • Publication number: 20190002708
    Abstract: There is provided a near-infrared shielding ultrafine particle dispersion body which has transparency in a visible light region, which has good near-infrared shielding properties, in which a blue haze phenomenon is suppressed, and which can be produced with high productivity, namely there is provided a near-infrared shielding ultrafine particle dispersion body in which ultrafine particles having near-infrared shielding properties are dispersed in a solid medium, wherein the ultrafine particles are composite tungsten oxide ultrafine particles, and a value of an XRD peak top intensity ratio of the composite tungsten oxide ultrafine particles is 0.13 or more when a value of the XRD peak intensity is set to 1, with plane (220) of a silicon powder standard sample (640c produced by NIST) as a reference.
    Type: Application
    Filed: December 19, 2016
    Publication date: January 3, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hirofumi TSUNEMATSU, Takeshi CHONAN
  • Publication number: 20180370813
    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: Application
    Filed: December 19, 2016
    Publication date: December 27, 2018
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hirofumi TSUNEMATSU, Hiroki NAKAYAMA, Takeshi CHONAN
  • Patent number: 7655301
    Abstract: To provide a laminated structure for shielding against solar radiation having high solar radiation blocking characteristics with low manufacturing costs. Fine particles 11 functioning to block solar radiation are obtained by firing tungstic acid under a reductive atmosphere, a liquid dispersion to form a solar radiation blocking material is prepared by crashing and dispersing treatment of the fine particles, a polymer base dispersing agent, and solvent, and thus prepared liquid dispersion to form a solar radiation blocking material is added to vinyl resin, which is molded into a sheet shape to obtain an intermediate film 12. Thus obtained intermediate film 12 is sandwiched between two sheets to be laminated selected from sheet-glass or plastic to obtain an intermediate layer 2, which is heated and bonded each other to prepare a laminated structure for shielding against solar radiation.
    Type: Grant
    Filed: October 18, 2004
    Date of Patent: February 2, 2010
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Takeshi Chonan, Kenji Adachi
  • Publication number: 20090216492
    Abstract: A solar radiation shielding member comprising solar radiation shielding fine particles, which has a transmittance having a maximum value at a wavelength of from 400 nm to 700 nm and a minimum value at a wavelength of from 700 nm to 1,800 nm, and, where the maximum value of the transmittance is represented by P, the minimum value thereof by B and the visible-light transmittance by VLT, has solar radiation shielding performance satisfying the following mathematical expression (1) at 60%?VLT?80% or satisfying the following mathematical expression (2) at 38%?VLT?55%: P/B+0.2067×VLT?17.5??(1); or P/B+2.4055×VLT?133.6??(2).
    Type: Application
    Filed: April 28, 2009
    Publication date: August 27, 2009
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Takeshi Chonan, Kenji Adachi
  • Patent number: 7247371
    Abstract: Physical characteristics of ATO fine particles capable of exhibiting such optical properties as a high visible light transmittance, a low solar radiation transmittance, and a low haze value when the ATO fine particles are formed on a transparent substrate or in the substrate are clarified, and the ATO fine particles having the physical characteristics thereof are manufactured. The ATO fine particles having such physical characteristics that a size of a crystallite constituting the ATO fine particles is 4 to 125 nm, and that a specific surface area of the fine particles of 5 to 110 m2/g can exhibit the above-described optical properties, and an example of a method for manufacturing thereof is to parallel-drop an antimony chloride alcoholic solution and an ammonium hydrogen carbonate aqueous solution in a tin chloride aqueous solution, thoroughly wash generated precipitates, dry and calcinate them in an atmosphere, thereby the ATO fine particles are manufactured.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: July 24, 2007
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Takeshi Chonan, Hiroko Kuno
  • Publication number: 20060086928
    Abstract: A solar radiation shielding member comprising solar radiation shielding fine particles, which has a transmittance having a maximum value at a wavelength of from 400 nm to 700 nm and a minimum value at a wavelength of from 700 nm to 1,800 nm, and, where the maximum value of the transmittance is represented by P, the minimum value thereof by B and the visible-light transmittance by VLT, has solar radiation shielding performance satisfying the following mathematical expression (1) at 60%?VLT?80% or satisfying the following mathematical expression (2) at 38%?VLT?55%: P/B+0.2067×VLT?17.5 ??(1); or P/B+2.4055×VLT?133.6 ??(2).
    Type: Application
    Filed: December 18, 2003
    Publication date: April 27, 2006
    Applicant: Sumitomo Metal Mining Co., Ltd.
    Inventors: Takeshi Chonan, Kenji Adachi
  • Publication number: 20060008640
    Abstract: To provide a laminated structure for shielding against solar radiation having high solar radiation blocking characteristics with low manufacturing costs. Fine particles 11 functioning to block solar radiation are obtained by firing tungstic acid under a reductive atmosphere, a liquid dispersion to form a solar radiation blocking material is prepared by crashing and dispersing treatment of the fine particles, a polymer base dispersing agent, and solvent, and thus prepared liquid dispersion to form a solar radiation blocking material is added to vinyl resin, which is molded into a sheet shape to obtain an intermediate film 12. Thus obtained intermediate film 12 is sandwiched between two sheets to be laminated selected from sheet-glass or plastic to obtain an intermediate layer 2, which is heated and bonded each other to prepare a laminated structure for shielding against solar radiation.
    Type: Application
    Filed: October 18, 2004
    Publication date: January 12, 2006
    Applicant: Sumitomo Metal Mining Co., Ltd.
    Inventors: Takeshi Chonan, Kenji Adachi
  • Publication number: 20050163999
    Abstract: Physical characteristics of ATO fine particles capable of exhibiting such optical properties as a high visible light transmittance, a low solar radiation transmittance, and a low haze value when the ATO fine particles are formed on a transparent substrate or in the substrate are clarified, and the ATO fine particles having the physical characteristics thereof are manufactured. The ATO fine particles having such physical characteristics that a size of a crystallite constituting the ATO fine particles is 4 to 125 nm, and that a specific surface area of the fine particles of 5 to 110 m2/g can exhibit the above-described optical properties, and an example of a method for manufacturing thereof is to parallel-drop an antimony chloride alcoholic solution and an ammonium hydrogen carbonate aqueous solution in a tin chloride aqueous solution, thoroughly wash generated precipitates, dry and calcinate them in an atmosphere, thereby the ATO fine particles are manufactured.
    Type: Application
    Filed: July 1, 2003
    Publication date: July 28, 2005
    Inventors: Takeshi Chonan, Hiroko Kuno
  • Patent number: 5609839
    Abstract: A NO.sub.x removal catalyst resistant to high temperatures, comprising an activated alumina wherein the specific surface area measured by the nitrogen adsorption method is 120 m.sup.2 /g or more, the bulk density measured by the mercury porosimetry is 0.60 g/cm.sup.3 or more, and the skeleton density measured by the mercury porosimetry is 1.80 g/cm.sup.3 or less and silver carried on said activated alumina. Then said catalyst or a structure having said catalyst coated on a substrate is brought in contact with exhaust gas from an internal combustion engine that is operated at a lean fuel/air ratio, such as a lean-burn engine, NO.sub.x can be removed efficiently within a quite short contact time.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: March 11, 1997
    Assignees: N.E. Chemcat Corporation, Sumitomo Metal Mining Co., Ltd.
    Inventors: Takashi Itoh, Yukio Kosaki, Takeshi Chonan, Takashi Matsuda, Yasuharu Kanno, Masao Wakabayashi, Makoto Nakamura
  • Patent number: 5559072
    Abstract: A NO.sub.x removal catalyst resistant to high temperatures, comprising an activated alumina wherein the specific surface area measured by the nitrogen adsorption method is 120 m.sup.2 /g or more, the bulk density measured by the mercury porosimetry is 0.60 g/cm.sup.3 or more, and the skeleton density measured by the mercury porosimetry is 1.80 g/cm.sup.3 or less and silver carried on said activated alumina. When said catalyst or a structure having said catalyst coated on a substrate is brought in contact with exhaust gas from an internal combustion engine that is operated at a lean fuel/air ratio, such as a lean-burn engine, NO.sub.x can be removed efficiently within a quite short contact time.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: September 24, 1996
    Assignees: N.E. Chemcat Corporation, Sumitomo Metal Mining Co., Ltd.
    Inventors: Takashi Itoh, Yukio Kosaki, Takeshi Chonan, Takashi Matsuda, Yasuharu Kanno, Masao Wakabayashi, Makoto Nakamura
  • Patent number: 5217849
    Abstract: A two-layer film carrier for TAB is made from a substrate prepared by forming a copper layer on a polyimide film by additive plating. A photoresist layer is formed on the copper layer, and another photoresist layer on the polyimide film. Both of the photoresist layers are simultaneously exposed to light through a mask applied to each of them to define a desired pattern. The exposed portions of the photoresist layer on the copper layer are subjected to development and postbaking, whereby selected portions of the copper layer are exposed. The exposed portions of the copper layer are additive plated with copper, whereby leads are formed. The exposed portions of the photoresist layer on the polyimide film are subjected to development and postbaking, whereby selected portions of the polyimide film are exposed. The remaining portions of the photoresist layer are removed from the copper layer and the underlying copper layer is etched.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: June 8, 1993
    Assignee: Sumitomo Metal Mining Company Limited
    Inventors: Takeshi Chonan, Yoshihiro Hirota, Yuko Kudo