Patents by Inventor Hiroki Murai
Hiroki Murai 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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Patent number: 11866527Abstract: A photocurable composition includes a photopolymerizable component and a photopolymerization initiator. When a test piece with 39 mm length, 8 mm width, and 4 mm thickness, is produced by photofabrication under conditions in which the photocurable composition is irradiated with visible light having 405 nm wavelength at 12 mJ/cm2 irradiation dose to form a cured layer with 100 m thickness, the cured layer is stacked in a thickness direction thereof to form a rectangular fabrication product with 39 mm length, 8 mm width, and 4 mm thickness, and the fabrication product is irradiated with ultraviolet rays having 365 nm wavelength at 10 J/cm2 irradiation dose to produce the test piece, a total fracture work of the test piece measured in compliance with ISO20795-1:2008 is 1100 J/m2 or more.Type: GrantFiled: March 22, 2021Date of Patent: January 9, 2024Assignee: MITSUI CHEMICALS, INC.Inventors: Toshikazu Sakamaki, Mai Kimura, Hiroki Murai, Takaaki Hayashi, Suguru Endo
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Publication number: 20230242785Abstract: A photocurable composition, wherein: in a case in which a rectangular sheet-like test piece P1 is produced by photomodeling under conditions in which the photocurable composition is irradiated with visible light having a wavelength of 405 nm at an irradiation dose of 11 mJ/cm2 to form a cured layer P1 with a thickness of 50 ?m, the cured layer P1 is stacked in a thickness direction thereof to form the rectangular sheet-like modeling product P1 with a length of 40 mm, a width of 10 mm, and a thickness of 0.5 mm, and the modeling product P1 is irradiated with ultraviolet rays having a wavelength of 365 nm at an irradiation dose of 3 J/cm2 to produce the test piece P1, the storage modulus at 135° C. of the test piece P1 is 3.0×108 Pa or more.Type: ApplicationFiled: July 6, 2021Publication date: August 3, 2023Applicant: MITSUI CHEMICALS, INC.Inventors: Takaaki HAYASHI, Toshikazu SAKAMAKI, Mai KIMURA, Hiroki MURAI, Suguru ENDO, Eiji KOBAYASHI
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Publication number: 20230137212Abstract: A photocurable composition includes a photopolymerizable component and a photopolymerization initiator. When a test piece with a length of 39 mm, a width of 8 mm, and a thickness of 4 mm, is produced by photofabrication under conditions in which the photocurable composition is irradiated with visible light having a wavelength of 405 nm at an irradiation dose of 12 mJ/cm2 to form a cured layer with a thickness of 100 µm, the cured layer is stacked in a thickness direction thereof to form a rectangular fabrication product with a length of 39 mm, a width of 8 mm, and a thickness of 4 mm, and the fabrication product is irradiated with ultraviolet rays having a wavelength of 365 nm at an irradiation dose of 10 J/cm2 to produce the test piece, a total fracture work of the test piece measured in compliance with ISO20795-1:2008 is 1100 J/m2 or more.Type: ApplicationFiled: March 22, 2021Publication date: May 4, 2023Applicant: MITSUI CHEMICALS, INC.Inventors: Toshikazu SAKAMAKI, Mai KIMURA, Hiroki MURAI, Takaaki HAYASHI, Suguru ENDO
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Publication number: 20220339077Abstract: A photocurable composition includes a (meth)acrylic monomer component and a photopolymerization initiator, wherein an adhesive force of a cured product is less than or equal to 1.5 N, and a rupture elongation of the cured product is greater than or equal to 20%.Type: ApplicationFiled: October 28, 2020Publication date: October 27, 2022Applicant: MITSUI CHEMICALS, INC.Inventors: Suguru ENDO, Toshikazu SAKAMAKI, Mai KIMURA, Hiroki MURAI, Takaaki HAYASHI
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Patent number: 11110038Abstract: A dental adhesive curable composition containing a polymerizable monomer including a polymerizable monomer represented by formula (1?) and defined amounts of an acidic group-containing polymerizable monomer, a polymerization initiator containing a peroxide and a photopolymerization initiator, and a reductant containing a sulfinic acid compound and/or a salt thereof, and a filler: wherein the R groups, n and m are defined. A dental adhesive curable kit and a mobile tooth fixing material are also provided.Type: GrantFiled: September 30, 2019Date of Patent: September 7, 2021Assignees: MITSUI CHEMICALS, INC., SUN MEDICAL CO., LTD.Inventors: Kazuhiko Yoshinaga, Yoshimitsu Tanabe, Shinsuke Kinoshita, Takenori Mitamura, Hiroki Murai, Takeshi Yokoyama, Yoshihisa Kamimoto, Tatsuya Ori, Hirohisa Shimizu, Masami Arata, Masuji Tsuchikawa, Sayaka Miyamori, Yoshiaki Katsura
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Publication number: 20200030194Abstract: A dental adhesive curable composition containing a polymerizable monomer including a polymerizable monomer represented by formula (1?) and defined amounts of an acidic group-containing polymerizable monomer, a polymerization initiator containing a peroxide and a photopolymerization initiator, and a reductant containing a sulfinic acid compound and/or a salt thereof, and a filler: wherein the R groups, n and m are defined. A dental adhesive curable kit and a mobile tooth fixing material are also provided.Type: ApplicationFiled: September 30, 2019Publication date: January 30, 2020Applicants: Mitsui Chemicals, Inc., Sun Medical Co., Ltd.Inventors: Kazuhiko YOSHINAGA, Yoshimitsu TANABE, Shinsuke KINOSHITA, Takenori MITAMURA, Hiroki MURAI, Takeshi YOKOYAMA, Yoshihisa KAMIMOTO, Tatsuya ORI, Hirohisa SHIMIZU, Masami ARATA, Masuji TSUCHIKAWA, Sayaka MIYAMORI, Yoshiaki KATSURA
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Patent number: 10470980Abstract: The present invention provides polymerizable monomers represented by the following general formula (1) that are useful as dental materials. In the general formula (1), Ra is a divalent C6-9 aromatic hydrocarbon group or a divalent C6-9 optionally bridged cyclic hydrocarbon group, R1 and R2 are each a hydrogen atom or a C1-3 alkyl group, R3, R4, R5 and R6 are each a hydrogen atom or a hydrocarbon group, R7 and R8 are each a hydrogen atom or a methyl group, m and n are each independently 0 to 4, and Rb and Rc are each independently a C2-6 linear alkylene or C2-6 linear oxyalkylene group optionally substituted with a C1-3 alkyl group or a (meth)acryloyloxymethylene group in place of a hydrogen atom.Type: GrantFiled: March 31, 2016Date of Patent: November 12, 2019Assignees: MITSUI CHEMICALS, INC., SUN MEDICAL CO., LTD.Inventors: Kazuhiko Yoshinaga, Yoshimitsu Tanabe, Shinsuke Kinoshita, Takenori Mitamura, Hiroki Murai, Takeshi Yokoyama, Yoshihisa Kamimoto, Tatsuya Ori, Hirohisa Shimizu, Masami Arata, Masuji Tsuchikawa, Sayaka Miyamori, Yoshiaki Katsura
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Publication number: 20180110683Abstract: The present invention provides polymerizable monomers represented by the following general formula (1) that are useful as dental materials. In the general formula (1), Ra is a divalent C6-9 aromatic hydrocarbon group or a divalent C6-9 optionally bridged cyclic hydrocarbon group, R1 and R2 are each a hydrogen atom or a C1-3 alkyl group, R3, R4, R5 and R6 are each a hydrogen atom or a hydrocarbon group, R7 and R8 are each a hydrogen atom or a methyl group, m and n are each independently 0 to 4, and Rb and Rc are each independently a C2-6 linear alkylene or C2-6 linear oxyalkylene group optionally substituted with a C1-3 alkyl group or a (meth)acryloyloxymethylene group in place of a hydrogen atom.Type: ApplicationFiled: March 31, 2016Publication date: April 26, 2018Applicants: MITSUI CHEMICALS, INC., SUN MEDICAL CO., LTD.Inventors: Kazuhiko YOSHINAGA, Yoshimitsu TANABE, Shinsuke KINOSHITA, Takenori MITAMURA, Hiroki MURAI, Takeshi YOKOYAMA, Yoshihisa KAMIMOTO, Tatsuya ORI, Hirohisa SHIMIZU, Masami ARATA, Masuji TSUCHIKAWA, Sayaka MIYAMORI, Yoshiaki KATSURA
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Patent number: 7238394Abstract: In a powder coating apparatus a pulse signal S2 of a low voltage generated by a pulse signal generation circuit (7) is boosted to a high voltage by means of a high voltage impression circuit (8), so that it is impressed upon corona electrodes (5). As a result, a corona discharge is intermittently generated from the corona electrodes (5) toward an object to be coated, whereby powder coating material sprayed from a nozzle opening of a gun main body in a forward direction is charged with negative ions developed by the corona discharge, whereafter it is directed toward the object to be coated, and is deposited on a surface of the object.Type: GrantFiled: November 5, 2002Date of Patent: July 3, 2007Assignee: Nihon Parkerizing Co., Ltd.Inventors: Tadao Morita, Hiroki Murai, Kosei Yabe, Akira Nakamura
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Publication number: 20040255865Abstract: In a powder coating apparatus according to the present invention, a pulse signal S2 of a low voltage generated by a pulse signal generation circuit 7 is boosted to a high voltage by means of a high voltage impression circuit 8, so that it is impressed upon corona electrodes 5. As a result, a corona discharge is intermittently generated from the corona electrodes 5 toward an object to be coated, whereby powder coating material sprayed from a nozzle opening of a gun main body in a forward direction is charged with negative ions developed by the corona discharge, whereafter it is directed toward the object to be coated, and is deposited on a surface of the object.Type: ApplicationFiled: April 23, 2004Publication date: December 23, 2004Inventors: Tadao Morita, Hiroki Murai, Kosei Yabe, Akira Nakamura
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Patent number: 6644569Abstract: In an apparatus for supplying powder coating material, when a given supply rate Qm of powder coating material F and a carrier air flow rate Qt are inputted, whether learned data of a suction air pressure Pfm with respect to the inputted given supply rate Qm is stored in a memory or not is determined. If the data is stored, the learned data of the suction air pressure Pfm is read, and a pressure regulator for suction air is instantaneously operated to be adjusted to have the value of the read learned data. After that, the apparatus moves to PID control with the given supply rate Qm being the target value. The value of the suction air pressure Pfm when the actual supply rate equals the given supply rate Qm is stored in the memory as learned data.Type: GrantFiled: March 25, 2002Date of Patent: November 11, 2003Assignees: Nihon Parkerizing Co., Ltd., Totota Jidosha Kabushiki KaishaInventors: Tadao Morita, Hiroki Murai, Masayuki Hajima, Kazuhide Naruse, Tadashi Suzuki
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Publication number: 20020150677Abstract: In an apparatus for supplying powder coating material, when a given supply rate Qm of powder coating material F and a carrier air flow rate Qt are inputted, whether learned data of a suction air pressure Pfm with respect to the inputted given supply rate Qm is stored in a memory or not is determined. If the data is stored, the learned data of the suction air pressure Pfm is read, and a pressure regulator for suction air is instantaneously operated to be adjusted to have the value of the read learned data. After that, the apparatus moves to PID control with the given supply rate Qm being the target value. The value of the suction air pressure Pfm when the actual supply rate equals the given supply rate Qm is stored in the memory as learned data.Type: ApplicationFiled: March 25, 2002Publication date: October 17, 2002Inventors: Tadao Morita, Hiroki Murai, Masayuki Hajima, Kazuhide Naruse, Tadashi Suzuki
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Patent number: 5929343Abstract: A pair of measuring electrodes (63, 64; 73, 74) are provided along the circumferential portion of a cylindrical measuring tube (62; 72) made of an insulating material. The flow rate of powder passing through the measuring tube is measured as a change in the electrostatic capacity between the pair of measuring electrodes.Type: GrantFiled: November 6, 1996Date of Patent: July 27, 1999Assignee: Nihon Parkerizing Co., Ltd.Inventors: Masahiro Yamamoto, Hiroki Murai, Yutaka Ishikawa, Mitsuyoshi Kumata, Keiji Kanai