Patents by Inventor Motohiro Oka
Motohiro Oka 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: 6476969Abstract: An antireflection film containing a transparent substrate film, a hard coat layer on the substrate film, and first and second refractive index layers on the hard coat layer. The hard coat layer has a refractive index higher than the refractive index of the transparent substrate film; the first refractive index layer has a refractive index higher than the refractive index of the hard coat layer; the second refractive index layer has a refractive index lower than the refractive index of the hard coat layer.Type: GrantFiled: September 12, 2001Date of Patent: November 5, 2002Assignee: Dai Nippon Printing Co., Ltd.Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematsu, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri, Hiroshi Yamada, Toshio Yoshihara
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Publication number: 20020051295Abstract: The present invention provides a transparent functional film comprising a transparent plastic substrate film and a hard coat layer provided thereon, wherein functional ultrafine particles are present in a highly localized form, thereby enabling the functional ultrafine particles to effectively exhibit their function and, at the same time, the hard coat layer to have a good adhesion to the functional ultrafine particle layer; and also an antireflection film and processes for producing the transparent functional film and the antireflection film.Type: ApplicationFiled: September 12, 2001Publication date: May 2, 2002Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematsu, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri, Hiroshi Yamada, Toshio Yoshihara
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Patent number: 6340404Abstract: A antiglare layer 12 having a fine uneven surface is formed directly or through other layer(s) on a transparent substrate film 11, and a layer 13 having a low refractive index, which is lower than the refractive index of the antiglare layer 12, is formed thereon. The refractive index of the antiglare layer 12 is higher than the refractive index of a layer in contact with said antiglare layer 12 on its surface remote from the layer 13 having a low refractive index. An SiOx film may be used as the layer 13 having a low refractive index. The SiOx film per se has excellent gas barrier property and antifouling property as an optical functional membrane and is an optical functional material characterized by having excellent moistureproofness, scratch resistance, adhesion to a substrate, transparency, low refractive index, dye deterioration preventive property, and other properties.Type: GrantFiled: March 24, 2000Date of Patent: January 22, 2002Assignee: Dai Nippon Printing Co., Ltd.Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematus, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri
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Patent number: 6335832Abstract: An antireflection film containing a transparent substrate film, a hard coat layer on the substrate film, and first and second refractive index layers on the hard coat layer. The hard coat layer has a refractive index higher than the refractive index of the transparent substrate film; the first refractive index layer has a refractive index higher than the refractive index of the hard coat layer; the second refractive index layer has a refractive index lower than the refractive index of the hard coat layer.Type: GrantFiled: August 10, 1999Date of Patent: January 1, 2002Assignee: Dai Nippon Printing Co., Ltd.Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematsu, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri, Hiroshi Yamada, Toshio Yoshihara
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Patent number: 6064524Abstract: A antiglare layer 12 having a fine uneven surface is formed directly or through other layer(s) on a transparent substrate film 11, and a layer 13 having a low refractive index, which is lower than the refractive index of the antiglare layer 12, is formed thereon. The refractive index of the antiglare layer 12 is higher than the refractive index of a layer in contact with said antiglare layer 12 on its surface remote from the layer 13 having a low refractive index. An SiO.sub.x film may be used as the layer 13 having a low refractive index. The SiO.sub.x film per se has excellent gas barrier property and antifouling property as an optical functional membrane and is an optical functional material characterized by having excellent moistureproofness, scratch resistance, adhesion to a substrate, transparency, low refractive index, dye, deterioration preventive property, and other properties.Type: GrantFiled: March 29, 1999Date of Patent: May 16, 2000Assignee: Dai Nippon Printing Co., Ltd.Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematus, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri
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Patent number: 5976297Abstract: The present invention provides a transparent functional film comprising a transparent plastic substrate film and a hard coat layer provided thereon, wherein functional ultrafine particles are present in a highly localized form, thereby enabling the functional ultrafine particles to effectively exhibit their function and, at the same time, the hard coat layer to have a good adhesion to the functional ultrafine particle layer; and also an antireflection film and processes for producing the transparent functional film and the antireflection film.A functional ultrafine particle layer 2 is formed on a release film 1. Separately, a resin composition for a hard coat layer is coated on a transparent plastic substrate film 3.Type: GrantFiled: July 21, 1997Date of Patent: November 2, 1999Assignee: Dai Nippon Printing Co., Ltd.Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematsu, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri, Hiroshi Yamada, Toshio Yoshihara
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Patent number: 5909314Abstract: A antiglare layer 12 having a fine uneven surface is formed directly or through other layer(s) on a transparent substrate film 11, and a layer 13 having a low refractive index, which is lower than the refractive index of the antiglare layer 12, is formed thereon. The refractive index of the antiglare layer 12 is higher than the refractive index of a layer in contact with said antiglare layer 12 on its surface remote from the layer 13 having a low refractive index. An SiO.sub.x film may be used as the layer 13 having a low refractive index. The SiO.sub.x film per se has excellent gas barrier property and antifouling property as an optical functional membrane and is an optical functional material characterized by having excellent moistureproofness, scratch resistance, adhesion to a substrate, transparency, low refractive index, dye deterioration preventive property, and other properties.Type: GrantFiled: February 13, 1995Date of Patent: June 1, 1999Assignee: Dai Nippon Printing Co., Ltd.Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematus, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri
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Patent number: 5747152Abstract: A transparent functional film comprising a transparent plastic substrate film and a hard coat layer provided thereon, wherein functional ultrafine particles are present in a highly localized form, thereby enabling the functional ultrafine particles to effectively exhibit their function and, at the same time, the hard coat layer to have a good adhesion to the functional ultrafine particle layer; and also an antireflection film and processes for producing the transparent functional film and the antireflection film.Type: GrantFiled: December 1, 1994Date of Patent: May 5, 1998Assignee: Dai Nippon Printing Co., Ltd.Inventors: Motohiro Oka, Mitsuru Tsuchiya, Norinaga Nakamura, Kiyotaka Takematsu, Yurie Ota, Hiroko Suzuki, Natsuko Yamashita, Hiroomi Katagiri, Hiroshi Yamada, Toshio Yoshihara
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Patent number: 5703433Abstract: Predetermined barrier ribs 2 are filled with three types of pastes of fluorescent substances 3 for R, G, and B by a screen printing method. Next, a sandblasting process is performed through a sandblasting mask 7. Thereafter, a sintering process is performed. Thus, fluorescent screens are formed on a glass substrate 1 and the wall surfaces of barrier ribs 2. As the sandblasting mask 7, a photoresist 4 is used. By a photolithographic method, a desired pattern of the sandblasting mask 7 can be used. In this manner, fluorescent screens can be formed on the wall surfaces of the barrier ribs as well as the glass substrate 1. The fluorescent screens formed on the wall surfaces of the barrier ribs are in such a parabolic shape that a discharging space defined by the fluorescent screen is widened toward a front plate 11.Type: GrantFiled: November 19, 1996Date of Patent: December 30, 1997Assignee: Dai Nippon Printing Co., Ltd.Inventors: Hideaki Fujii, Hiroshi Ishiga, Masatoshi Harayama, Motohiro Oka
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Patent number: 5601468Abstract: Predetermined barrier ribs 2 are filled with three types of pastes of fluorescent substances 3 for R, G, and B by a screen printing method. Next, a sandblasting process is performed through a sandblasting mask 7. Thereafter, a sintering process is performed. Thus, fluorescent screens are formed on a glass substrate 1 and the wall surfaces of barrier ribs 2. As the sandblasting mask 7, a photoresist 4 is used. By a photolithographic method, a desired pattern of the sandblasting mask 7 can be used. In this manner, fluorescent screens can be formed on the wall surfaces of the barrier ribs as well as the glass substrate 1. The fluorescent screens formed on the wall surfaces of the barrier ribs are in such a parabolic shape that a discharging space defined by the fluorescent screen is widened toward a front plate 11.Type: GrantFiled: March 20, 1996Date of Patent: February 11, 1997Assignee: Dai Nippon Printing Co., Ltd.Inventors: Hideaki Fujii, Hiroshi Ishiga, Masatoshi Harayama, Motohiro Oka
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Patent number: 5246664Abstract: A water-disintegrable support paper material largely formed of fibrous carboxymethylcellulose or carboxyethylcellulose having a degree of etherification of 0.1 to 1.0 and a degree of base saturation of 20% or more. A solution or dispersion of that paper has a pH of 5.0 to 8.0. There is also disclosed a composition for forming a water-disintegrable coat for coating on the support, the composition being a mixture of (a) at least one water-insoluble resin capable of forming a film having a saturation hygroscopicity less than 15% at a 90% relative humidity, (b) at least one water-soluble resin capable of forming film having a saturation hygroscopicity of 15% or more at a 90% relative humidity, and (c) a solvent in which both the resins (a) and (b) can dissolve.Type: GrantFiled: May 20, 1991Date of Patent: September 21, 1993Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Ryohei Nagata, Tskeshi Saito, Tetsuya Fujiwara, Motohiro Oka, Masanao Watanabe
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Patent number: 5170799Abstract: Disclosed is a test strip for measuring tear production. The test strip comprises a generally flat sheet material having one end rounded to be semi-circular shaped and being printed with a folding line along which said strip is bent prior to the measurement operation. The test strip is further printed with graduation marks and a scale for indicating the amount of absorbed tear. In a preferred embodiment, provided at either one or both corners of the end opposite to the rounded end is a mark indicating that the particular test strip is used for measuring one of either the left or right eye. The sheet material is preferably made of filter paper. The test strip has no notched portion which would weaken the sheet material and yet may be folded precisely along the fold line prior to use. The graduation marks and scales printed on the test strip enable easy measurement of the length of the portion wetted by tear fluid.Type: GrantFiled: February 27, 1992Date of Patent: December 15, 1992Assignee: Showa Yakuhin Kako Co., Ltd.Inventors: Makoto Nagase, Kuniaki Asami, Motohiro Oka, Katsuhiko Hoshina
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Patent number: 5135005Abstract: Disclosed is a test strip for measuring tear production. The test strip comprises a generally flat sheet material having one end rounded to be semi-circular shaped and being printed with a folding line along which said strip is bent prior to the measurement operation. The test strip is further printed with graduation marks and a scale for indicating the amount of absorbed tear. In a preferred embodiment, provided at either one or both corners of the end opposite to the rounded end is a mark indicating that the particular test strip is used for measuring one of either the left or right eye. The sheet material is preferably made of filter paper. The test strip has no notched portion which would weaken the sheet material and yet may be folded precisely along the fold line prior to use. The graduation marks and scales printed on the test strip enable easy measurement of the length of the portion wetted by tear fluid.Type: GrantFiled: December 26, 1991Date of Patent: August 4, 1992Assignee: Showa Yakuhin Kako Co., Ltd.Inventors: Makoto Nagase, Kuniaki Asami, Motohiro Oka, Katsuhiko Hoshina
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Patent number: 5046507Abstract: The present invention is a tear production measuring sheet that has a pair of measuring strips adapted to be used for the right and left eyes and is disposed side by side in such a manner that the strips have a common scale. Each of the measuring strips is separated from the measuring sheet by a cut formed in the measuring sheet so as to extend around the measuring strip, except for a connection between the measuring strip and the sheet.Type: GrantFiled: March 19, 1990Date of Patent: September 10, 1991Assignee: Showa Yakuhin Kako Co., Ltd.Inventors: Makoto Nagase, Kuniaki Asami, Shuichi Kobayashi, Yasunori Arai, Kazuo Ito, Motohiro Oka