Patents by Inventor Masafumi Hirai
Masafumi Hirai 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: 10040943Abstract: Hollow silica-based particles having cavities inside the outer shell having a low refractive index. The method of producing the silica-based particles comprises the following steps (a) and (b): (a) a step in which, when an aqueous silicate solution and/or an acidic silicic acid solution and an aqueous solution of an alkali-soluble inorganic compound are simultaneously added in an alkali aqueous solution to prepare a dispersion liquid of composite oxide particles, an electrolytic salt is added at the molar ratio of a mole number of the electrolytic salt (ME) versus that of SiO2 (MS) [(ME)/(MS)] in the range from 0.1 to 10, and (b) a step of furthermore adding an electrolytic salt, if necessary, to the dispersion liquid of composite oxide particles and then removing at least a portion of elements constituting the composite oxide other than silicon by adding an acid to prepare a dispersion liquid of silica-based particles.Type: GrantFiled: July 8, 2004Date of Patent: August 7, 2018Assignee: JGC CATALYSTS AND CHEMICALS LTD.Inventors: Ryo Muraguchi, Mitsuaki Kumazawa, Toshiharu Hirai, Masafumi Hirai
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Patent number: 9683108Abstract: There is provided an antireflective laminate having a low refractive index and excellent mechanical strength, which comprises a coating layer of an ionizing radiation curing-type resin composition comprising ionizing radiation curing group-containing hollow silica fine particles. The antireflective laminate comprises a light transparent base material and at least a low refractive index layer having a refractive index of not more than 1.45 provided on the light transparent base material, wherein the low refractive index layer comprises an ionizing radiation curing-type resin composition and silica fine particles having an outer shell layer with the interior of the silica fine particles being porous or void, and, for a part or all of the silica fine particles, at least a part of the surface of the silica fine particle has been treated with an ionizing radiation curing group-containing silane coupling agent.Type: GrantFiled: September 28, 2015Date of Patent: June 20, 2017Assignees: Dai Nippon Printing Co., Ltd., JGC Catalysts and Chemicals Ltd.Inventors: Utako Mizuno, Midori Nakajo, Seiji Shinohara, Toshio Yoshihara, Hiroyasu Nishida, Ryo Muraguchi, Masafumi Hirai
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Publication number: 20160017152Abstract: There is provided an antireflective laminate having a low refractive index and excellent mechanical strength, which comprises a coating layer of an ionizing radiation curing-type resin composition comprising ionizing radiation curing group-containing hollow silica fine particles. The antireflective laminate comprises a light transparent base material and at least a low refractive index layer having a refractive index of not more than 1.45 provided on the light transparent base material, wherein the low refractive index layer comprises an ionizing radiation curing-type resin composition and silica fine particles having an outer shell layer with the interior of the silica fine particles being porous or void, and, for a part or all of the silica fine particles, at least a part of the surface of the silica fine particle has been treated with an ionizing radiation curing group-containing silane coupling agent.Type: ApplicationFiled: September 28, 2015Publication date: January 21, 2016Inventors: Utako MIZUNO, Midori NAKAJO, Seiji SHINOHARA, Toshio YOSHIHARA, Hiroyasu NISHIDA, Ryo MURAGUCHI, Masafumi HIRAI
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Publication number: 20080090070Abstract: Hollow silica-based particles having cavities inside the outer shell having a low refractive index. The method of producing the silica-based particles comprises the following steps (a) and (b): (a) a step in which, when an aqueous silicate solution and/or an acidic silicic acid solution and an aqueous solution of an alkali-soluble inorganic compound are simultaneously added in an alkali aqueous solution to prepare a dispersion liquid of composite oxide particles, an electrolytic salt is added at the molar ratio of a mole number of the electrolytic salt (ME) versus that of SiO2 (MS) [(ME)/(MS)] in the range from 0.1 to 10, and (b) a step of furthermore adding an electrolytic salt, if necessary, to the dispersion liquid of composite oxide particles and then removing at least a portion of elements constituting the composite oxide other than silicon by adding an acid to prepare a dispersion liquid of silica-based particles.Type: ApplicationFiled: July 8, 2004Publication date: April 17, 2008Applicant: Catalysts & chemicals Industries Co., LtdInventors: Ryo Muraguchi, Mitsuaki Kumazawa, Toshiharu Hirai, Masafumi Hirai
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Publication number: 20060269733Abstract: There is provided an antireflective laminate having a low refractive index and excellent mechanical strength, which comprises a coating layer of an ionizing radiation curing-type resin composition comprising ionizing radiation curing group-containing hollow silica fine particles. The antireflective laminate comprises a light transparent base material and at least a low refractive index layer having a refractive index of not more than 1.45 provided on the light transparent base material, wherein the low refractive index layer comprises an ionizing radiation curing-type resin composition and silica fine particles having an outer shell layer with the interior of the silica fine particles being porous or void, and, for a part or all of the silica fine particles, at least a part of the surface of the silica fine particle has been treated with an ionizing radiation curing group-containing silane coupling agent.Type: ApplicationFiled: August 26, 2004Publication date: November 30, 2006Applicants: Dai Nippon Printing Co., Ltd., Catalysts & Chemicals Industries Co., Ltd.Inventors: Utako Mizuno, Midori Nakajo, Seiji Shinohara, Toshio Yoshihara, Hiroyasu Nishida, Ryo Muraguchi, Masafumi Hirai
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Patent number: 6858294Abstract: A coating liquid for forming on a substrate surface a hard coat film which exhibits a high refractive index, being excellent in resistance to hot water, weather resistance, scuffing resistance, attrition resistance and dye affinity, and which does not exhibit photochromism, is provided. A coating liquid for forming a hard coat film, comprises a matrix-forming component and composite metal oxide particles of 1 to 100 nm average particle size, composed either of an iron oxide component and a titanium oxide component used at a specified ratio or an iron oxide component, a titanium oxide component and a silica component used at a specified ratio. A substrate coated with a hard coat film is formed by applying the above coating liquid to the substrate surface and effecting drying.Type: GrantFiled: December 14, 1998Date of Patent: February 22, 2005Assignee: Catalyst & Chemicals Industries Co., Ltd.Inventors: Hirokazu Tanaka, Masafumi Hirai, Chiemi Murakami
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Patent number: 5810498Abstract: A file having a polypropyrene base sheet and a fastener assembly that includes a polypropyrene base member thermally bonded to the polypropyrene base sheet. A relatively thin polypropyrene sheet, such as a polypropyrene sheet having a thickness of about 0.3 mm or less, is sturdy and is used, thus securing a large mechanical strength to support the fastener assembly. The polypropyrene base member is bonded to a relatively thin polypropyrene base sheet by an ultrasonic bonding. The ultrasonic bonding achieves a strong connection between the polypropyrene member and the relatively thin polypropyrene sheet.Type: GrantFiled: January 8, 1996Date of Patent: September 22, 1998Assignee: Lion Office Products, Inc.Inventor: Masafumi Hirai
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Patent number: 5789476Abstract: Disclosed is a film-forming coating solution comprising a matrix and a fine particulate compound oxide composed of oxides of titanium, silicon and zirconium and/or aluminum. This film-forming coating solution can form a colorless and transparent film of high refractive index which is excellent in dyeing property and adhesion to the substrate. Also disclosed is a synthetic resin lens of high refractive index having a film (hard coat film) formed from the film-forming coating solution on the surface. This synthetic resin lens is free from interference fringe and has a reduced thickness.Type: GrantFiled: October 19, 1995Date of Patent: August 4, 1998Assignees: Seiko Epson Corporation, Catalysts & Chemicals Industries Co., Ltd.Inventors: Takeaki Iryo, Satoshi Kubota, Kazunori Miyashita, Katsuyoshi Takeshita, Hirokazu Tanaka, Shuitsu Hiraoka, Masafumi Hirai, Tatsuhisa Uchino
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Patent number: D366495Type: GrantFiled: October 24, 1994Date of Patent: January 23, 1996Assignee: Lion Office Products, Inc.Inventor: Masafumi Hirai
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Patent number: D366674Type: GrantFiled: October 24, 1994Date of Patent: January 30, 1996Assignee: Lion Office Products, Inc.Inventor: Masafumi Hirai