Patents by Inventor Hiroshi Kumai
Hiroshi Kumai 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).
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Publication number: 20200347082Abstract: An object of the present invention is to provide a method capable of producing a tetraalkoxysilane with a high energy efficiency and with a high yield. The present invention provides a method for producing a tetraalkoxysilane, the method including: a first step of reacting an alcohol with a silicon oxide; and a second step of bringing a vaporized component of the reaction mixture obtained in the first step into contact with a molecular sieve.Type: ApplicationFiled: December 25, 2018Publication date: November 5, 2020Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Norihisa FUKAYA, Seong-Jib CHOI, Jun-Chul CHOI, Toshio HORIKOSHI, Sho KATAOKA, Thuy NGUYEN, Kazuhiko SATO, Minoru HASEGAWA, Hiroshi KUMAI
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Patent number: 10807378Abstract: An ink set comprises black ink having a static surface tension A and yellow ink having a static surface tension B, wherein the static surface tension A is 28.7 mN/m or more and greater than the static surface tension B, wherein the ink set is used in an image forming device including an inkjet head including a nozzle plate including a first nozzle array and a second nozzle array disposed adjacent to the first nozzle array, the first nozzle array including multiple first nozzles configured to discharge the black ink and a second nozzle array including multiple second nozzles configured to discharge the yellow ink wherein each nozzle of the multiple first nozzles and the multiple second nozzles has a cylindrical portion having a length of 25 ?m or longer along an axial direction with an opening on an ink discharging side of the nozzle plate.Type: GrantFiled: March 6, 2019Date of Patent: October 20, 2020Assignee: Ricoh Company, Ltd.Inventors: Takashi Watanabe, Taku Hatakeyama, Kaoru Tadokoro, Sho Oyamatsu, Tomohiro Inoue, Hiroshi Gotou, Mio Kumai
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Patent number: 10746908Abstract: There is provide an optical filter suppressed in incidence angle dependence and having high visible light transmittance. The optical filter includes: an absorption layer containing a first near-infrared absorbent (DA) having a maximum absorption wavelength ?(DA_Tmin) in wavelengths of 685 to 715 nm and a second near-infrared absorbent (DB) having a maximum absorption wavelength ?(DB_Tmin) in wavelengths of 705 to 725 nm or wavelengths of more than 725 nm and 900 nm or less on a side of a wavelength longer than the maximum absorption wavelength ?(DA_Tmin), and satisfying specific light absorption characteristics; and a reflection layer including a dielectric multilayer film satisfying specific reflection characteristics in wavelengths of 700 to 1150 nm, wherein a transmittance of the reflection layer in a boundary region of visible light and near-infrared light and a transmittance of the absorption layer have a specific relation.Type: GrantFiled: November 21, 2017Date of Patent: August 18, 2020Assignee: AGC Inc.Inventors: Yoshiharu Ooi, Hiroshi Kumai, Kazuhiko Shiono, Hiroki Hotaka
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Patent number: 10696069Abstract: A liquid discharge apparatus includes a conveyance path, a liquid discharge head, and a drying device. A medium is to be conveyed on the conveyance path. The liquid discharge head discharges liquid onto the medium conveyed on the conveyance path. The conveyance path includes a switchback path and an ejection path. The switchback path switches back a conveyance direction of the medium onto which the liquid has been discharged. The ejection path conveys the medium onto which the liquid has been discharged to an ejection port. The drying device dries the medium both on the switchback path and on the ejection path.Type: GrantFiled: March 6, 2019Date of Patent: June 30, 2020Assignee: Ricoh Company, Ltd.Inventors: Taku Hatakeyama, Takashi Watanabe, Kaoru Tadokoro, Sho Oyamatsu, Tomohiro Inoue, Hiroshi Gotou, Mio Kumai
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Patent number: 10654292Abstract: A liquid discharge apparatus includes a conveyance path, a liquid discharge head, an ejection tray, and a drying device. A medium is conveyed in the conveyance path. The liquid discharge head discharges liquid onto the medium conveyed in the conveyance path. The medium is ejected to the ejection tray. The drying device dries the medium. The conveyance path includes a first bending portion to bend the medium, with a liquid-applied surface of the medium facing inward. The ejection tray includes a second bending portion to bend the medium, with the liquid-applied surface of the medium facing inward. A curvature of the medium bent by the first bending portion is greater than a curvature of the medium bent by the second bending portion. The drying device dries the medium conveyed in the first bending portion.Type: GrantFiled: March 13, 2019Date of Patent: May 19, 2020Assignee: Ricoh Company, Ltd.Inventors: Taku Hatakeyama, Takashi Watanabe, Kaoru Tadokoro, Sho Oyamatsu, Tomohiro Inoue, Hiroshi Gotou, Mio Kumai
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Patent number: 10618331Abstract: An ink set comprises black ink having a static surface tension A and yellow ink having a static surface tension B, wherein the static surface tension A is by 0.6 mN/m or more greater than the static surface tension B, wherein the ink set is used in an image forming device including an inkjet head including a nozzle plate including a first nozzle array and a second nozzle array disposed adjacent to the first nozzle array, the first nozzle array including multiple first nozzles configured to discharge the black ink and a second nozzle array including multiple second nozzles configured to discharge the yellow ink, wherein each nozzle of the multiple first nozzles and the multiple second nozzles has a cylindrical portion having a length of 25 ?m or longer along an axial direction with an opening on an ink discharging side of the nozzle plate.Type: GrantFiled: March 6, 2019Date of Patent: April 14, 2020Assignee: Ricoh Company, Ltd.Inventors: Takashi Watanabe, Taku Hatakeyama, Kaoru Tadokoro, Sho Oyamatsu, Tomohiro Inoue, Hiroshi Gotou, Mio Kumai
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Publication number: 20190283460Abstract: A liquid discharge apparatus includes a conveyance path, a liquid discharge head, an ejection tray, and a drying device. A medium is conveyed in the conveyance path. The liquid discharge head discharges liquid onto the medium conveyed in the conveyance path. The medium is ejected to the ejection tray. The drying device dries the medium. The conveyance path includes a first bending portion to bend the medium, with a liquid-applied surface of the medium facing inward. The ejection tray includes a second bending portion to bend the medium, with the liquid-applied surface of the medium facing inward. A curvature of the medium bent by the first bending portion is greater than a curvature of the medium bent by the second bending portion. The drying device dries the medium conveyed in the first bending portion.Type: ApplicationFiled: March 13, 2019Publication date: September 19, 2019Inventors: Taku HATAKEYAMA, Takashi WATANABE, Kaoru TADOKORO, Sho OYAMATSU, Tomohiro INOUE, Hiroshi GOTOU, Mio KUMAI
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Publication number: 20190275805Abstract: An ink set comprises black ink having a static surface tension A and yellow ink having a static surface tension B, wherein the static surface tension A is 28.7 mN/m or more and greater than the static surface tension B, wherein the ink set is used in an image forming device including an inkjet head including a nozzle plate including a first nozzle array and a second nozzle array disposed adjacent to the first nozzle array, the first nozzle array including multiple first nozzles configured to discharge the black ink and a second nozzle array including multiple second nozzles configured to discharge the yellow ink wherein each nozzle of the multiple first nozzles and the multiple second nozzles has a cylindrical portion having a length of 25 ?m or longer along an axial direction with an opening on an ink discharging side of the nozzle plate.Type: ApplicationFiled: March 6, 2019Publication date: September 12, 2019Inventors: Takashi WATANABE, Taku Hatakeyama, Kaoru Tadokoro, Sho Oyamatsu, Tomohiro Inoue, Hiroshi Gotou, Mio Kumai
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Publication number: 20190275818Abstract: An ink set comprises black ink having a static surface tension A and yellow ink having a static surface tension B, wherein the static surface tension A is by 0.6 mN/m or more greater than the static surface tension B, wherein the ink set is used in an image forming device including an inkjet head including a nozzle plate including a first nozzle array and a second nozzle array disposed adjacent to the first nozzle array, the first nozzle array including multiple first nozzles configured to discharge the black ink and a second nozzle array including multiple second nozzles configured to discharge the yellow ink, wherein each nozzle of the multiple first nozzles and the multiple second nozzles has a cylindrical portion having a length of 25 ?m or longer along an axial direction with an opening on an ink discharging side of the nozzle plate.Type: ApplicationFiled: March 6, 2019Publication date: September 12, 2019Inventors: Takashi WATANABE, Taku Hatakeyama, Kaoru Tadokoro, Sho Oyamatsu, Tomohiro Inoue, Hiroshi Gotou, Mio Kumai
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Publication number: 20190275811Abstract: A liquid discharge apparatus includes a conveyance path, a liquid discharge head, and a drying device. A medium is to be conveyed on the conveyance path. The liquid discharge head discharges liquid onto the medium conveyed on the conveyance path. The conveyance path includes a switchback path and an ejection path. The switchback path switches back a conveyance direction of the medium onto which the liquid has been discharged. The ejection path conveys the medium onto which the liquid has been discharged to an ejection port. The drying device dries the medium both on the switchback path and on the ejection path.Type: ApplicationFiled: March 6, 2019Publication date: September 12, 2019Inventors: Taku HATAKEYAMA, Takashi WATANABE, Kaoru TADOKORO, Sho OYAMATSU, Tomohiro INOUE, Hiroshi GOTOU, Mio KUMAI
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Patent number: 10381842Abstract: A power supply system of an embodiment has a plurality of power conditioners, an acquisition device, and a search instruction generator. The power conditioners convert a form of electrical power generated by a plurality of electrical generators into a different form of electrical power. The acquisition device acquires a respective information regarding power output from each of the plurality of power conditioners. The search instruction generator generates and outputs an operating point search instruction to one or more power conditioners being lower in a ratio of output power with respect to a reference power by at least a prescribed degree than one or more different power conditioners, wherein the reference power is given, based on the maximum output power or rated power of the corresponding electrical generator, or based on the maximum output power or rated power of the power conditioner.Type: GrantFiled: September 9, 2016Date of Patent: August 13, 2019Assignee: Kabushiki Kaisha ToshibaInventors: Koji Maki, Hiroshi Mochikawa, Makoto Kumai, Hiroaki Matsumoto, Shingo Yanagimoto, Akihiro Matsui
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Patent number: 10345498Abstract: Provided is an infrared cut filter including: an infrared absorbing layer of a transparent resin containing an infrared absorber; and a selected wavelength cut layer stacked on the infrared absorbing layer, wherein the following requirements are satisfied. (i) In a spectral transmittance curve for an incident angle of 0°, an average transmittance in a 450-600 nm range is 80% or more, a transmittance in a 700-1200 nm range is 2.0% or less, and D0 represented by the following expression is less than 0.04. D0 (%/nm)=(Tmax·0?Tmin·0)/(?(Tmax·0)??(Tmin·0)) (ii) wherein a spectrum transmittance curve for an incident angle of 30°, an average transmittance in the 450 to 600 nm range is 80% or more, a transmittance in the 700-1200 nm range is 2.0% or less, and D30 represented by the following expression is less than 0.04.Type: GrantFiled: September 30, 2015Date of Patent: July 9, 2019Assignee: AGC Inc.Inventors: Kyoko Yamamoto, Takaaki Murakami, Mitsuyuki Tatemura, Hiroshi Kumai
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Publication number: 20190049809Abstract: An electrochromic element which suppresses ripples in a color-reduction state and with which good visible light transmittance can be obtained is provided. An electrochromic element 100 includes: a transparent electrolyte layer 110; a pair of solid electrochromic layers which sandwiches the transparent electrolyte layer and is constituted by a pair of a reduction coloring-type solid electrochromic layer 120 and an oxidation coloring-type solid electrochromic layer 130 opposing each other, and a pair of transparent conductive films 140, where in the thickness and refractive indexe with respect to light at a wavelength of 550 nm about the transparent electrolyte layer 140, the reduction coloring-type solid electrochromic layer 120 and the oxidation coloring-type solid electrochromic layer 130, those values are provided so as to satisfy predetermined relations to suppress the ripples.Type: ApplicationFiled: October 17, 2018Publication date: February 14, 2019Applicant: AGC Inc.Inventors: Takuji OYAMA, Teppei KONISHI, Shinya TAHARA, Hiroshi KUMAI
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Patent number: 10088730Abstract: There is provided an optical element which is an apodized filter capable of externally controlling an optical characteristic and stable over a long period. An optical element 100 is an optical element including: a transparent electrolyte layer 110; a pair of solid electrochromic layers which sandwiches the transparent electrolyte layer 110; and further a pair of transparent conductive films 140 which sandwiches a pair of the solid electrochromic layer, wherein a pair of the solid electrochromic layers is constituted by a reduction coloring-type solid electrochromic layer 120 and an oxidation coloring-type solid electrochromic layer 130 opposing each other, the optical element including: an apodized characteristic in which transmittance increases gradually from an outer periphery toward a center in a plane orthogonal to a thickness direction of the transparent electrolyte layer 110.Type: GrantFiled: April 20, 2017Date of Patent: October 2, 2018Assignee: AGC Inc.Inventors: Hiroshi Kumai, Shinya Tahara, Teppei Konishi, Koichi Nakagawa, Takuji Oyama, Satoshi Umeda
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Publication number: 20180095203Abstract: There is provide an optical filter suppressed in incidence angle dependence and having high visible light transmittance. The optical filter includes: an absorption layer containing a first near-infrared absorbent (DA) having a maximum absorption wavelength ?(DA_Tmin) in wavelengths of 685 to 715 nm and a second near-infrared absorbent (DB) having a maximum absorption wavelength ?(DB_Tmin) in wavelengths of 705 to 725 nm or wavelengths of more than 725 nm and 900 nm or less on a side of a wavelength longer than the maximum absorption wavelength ?(DA_Tmin), and satisfying specific light absorption characteristics; and a reflection layer including a dielectric multilayer film satisfying specific reflection characteristics in wavelengths of 700 to 1150 nm, wherein a transmittance of the reflection layer in a boundary region of visible light and near-infrared light and a transmittance of the absorption layer have a specific relation.Type: ApplicationFiled: November 21, 2017Publication date: April 5, 2018Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Yoshiharu Ooi, Hiroshi Kumai, Kazuhiko Shiono, Hiroki Hotaka
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Patent number: 9753196Abstract: The present invention relates to an optical filter, a solid-state imaging element and an imaging device lens which contain a near infrared ray absorbing layer having a specific near infrared ray absorbing dye dispersed in a transparent resin having a refractive index of 1.54 or more, and also relates to an imaging device containing the solid-state imaging element or the imaging device lens. The near infrared ray absorbing layer has a transmittance of visible light of from 450 to 600 nm of 70% or more, a transmittance of light in a wavelength region of from 695 to 720 nm of not more than 10%, and an amount of change of transmittance of not more than ?0.8.Type: GrantFiled: January 11, 2016Date of Patent: September 5, 2017Assignee: ASAHI GLASS COMPANY, LIMITEDInventors: Makoto Hasegawa, Satoshi Kashiwabara, Hiroshi Shimoda, Kenta Sekikawa, Takashi Shibuya, Mitsuo Osawa, Katsushi Kamijyo, Hiroyuki Arishima, Hiroshi Kumai
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Publication number: 20170219901Abstract: There is provided an optical element which is an apodized filter capable of externally controlling an optical characteristic and stable over a long period. An optical element 100 is an optical element including: a transparent electrolyte layer 110; a pair of solid electrochromic layers which sandwiches the transparent electrolyte layer 110; and further a pair of transparent conductive films 140 which sandwiches a pair of the solid electrochromic layer, wherein a pair of the solid electrochromic layers is constituted by a reduction coloring-type solid electrochromic layer 120 and an oxidation coloring-type solid electrochromic layer 130 opposing each other, the optical element including: an apodized characteristic in which transmittance increases gradually from an outer periphery toward a center in a plane orthogonal to a thickness direction of the transparent electrolyte layer 110.Type: ApplicationFiled: April 20, 2017Publication date: August 3, 2017Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Hiroshi KUMAI, Shinya TAHARA, Teppei KONISHI, Koichi NAKAGAWA, Takuji OYAMA, Satoshi UMEDA
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Patent number: 9664830Abstract: An optical filter including a near infrared absorbing layer on a glass substrate, in which adhesiveness between the glass substrate and the near infrared absorbing layer is firm, high reliability is enabled in uses under a high temperature and high humidity environment, and manufacturing yield is secured, and a high reliability solid-state imaging device having the optical filter are provided. An optical filter includes: a glass substrate; and a near infrared absorbing layer formed on one principal surface of the glass substrate, wherein the near infrared absorbing layer is obtained by reacting a composition for forming the near infrared absorbing layer on the glass substrate and the composition contains a transparent resin having a fluorene skeleton and a reactivity group; a near infrared absorbing dye; and a silane coupling agent and/or oligomer thereof having a hydrolyzable group and a functional group which have reactivity for the reactivity group.Type: GrantFiled: August 21, 2013Date of Patent: May 30, 2017Assignee: ASAHI GLASS COMPANY, LIMITEDInventors: Makoto Hasegawa, Kenta Sekikawa, Satoshi Kashiwabara, Hiroshi Shimoda, Yuriko Kaida, Hiroshi Kumai
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Publication number: 20160231482Abstract: The present invention relates to an optical filter, a solid-state imaging element and an imaging device lens which contain a near infrared ray absorbing layer having a specific near infrared ray absorbing dye dispersed in a transparent resin having a refractive index of 1.54 or more, and also relates to an imaging device containing the solid-state imaging element or the imaging device lens. The near infrared ray absorbing layer has a transmittance of visible light of from 450 to 600 nm of 70% or more, a transmittance of light in a wavelength region of from 695 to 720 nm of not more than 10%, and an amount of change of transmittance of not more than ?0.8.Type: ApplicationFiled: January 11, 2016Publication date: August 11, 2016Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Makoto HASEGAWA, Satoshi KASHIWABARA, Hiroshi SHIMODA, Kenta SEKIKAWA, Takashi SHIBUYA, Mitsuo OSAWA, Katsushi KAMIJYO, Hiroyuki ARISHIMA, Hiroshi KUMAI
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Patent number: 9268072Abstract: The present invention relates to an optical filter, a solid-state imaging element and an imaging device lens which contain a near infrared ray absorbing layer having a specific near infrared ray absorbing dye dispersed in a transparent resin having a refractive index of 1.54 or more, and also relates to an imaging device containing the solid-state imaging element or the imaging device lens. The near infrared ray absorbing layer has a transmittance of visible light of from 450 to 600 nm of 70% or more, a transmittance of light in a wavelength region of from 695 to 720 nm of not more than 10%, and an amount of change of transmittance of not more than ?0.8.Type: GrantFiled: December 6, 2013Date of Patent: February 23, 2016Assignee: ASAHI GLASS COMPANY, LIMITEDInventors: Makoto Hasegawa, Satoshi Kashiwabara, Hiroshi Shimoda, Kenta Sekikawa, Takashi Shibuya, Mitsuo Osawa, Katsushi Kamijyo, Hiroyuki Arishima, Hiroshi Kumai