Patents by Inventor Yoshitaka Takesako
Yoshitaka Takesako 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: 7211317Abstract: The present invention provides a light transmitting hard coat film for use in touch panels, which comprises: (A) a light transmitting hard coat layer composed of a cured product of an ionizing-radiation-curable compound; (B) a high refractive index layer composed of a cured product of an ionizing-radiation-curable compound and containing antimony-doped tin oxide plus zirconium oxide and/or titanium oxide, as metal oxides, which has a refractive index in the range of 1.65 to 1.90 and a thickness of 30 to 160 nm; and (C) a low refractive index layer composed of a cured product of a siloxane-based curable compound which has a refractive index in the range of 1.40 to 1.55 and a thickness of 10 to 50 nm, all the layers being laminated on one side of a light transmitting base film in this order. The light transmitting hard coat film for use in touch panels has a high light transmittance and can produce transmitted light of blue color.Type: GrantFiled: November 17, 2003Date of Patent: May 1, 2007Assignee: Lintec CorporationInventors: Yuki Hongo, Satoru Shoshi, Yoshitaka Takesako
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Patent number: 7153563Abstract: A hard coat film comprising a substrate film and a hard coat layer disposed at least on one face of the substrate film, wherein the hard coat layer comprises 100 parts by weight of (A) a resin of an ionizing radiation curing type and 0.1 to 10 parts by weight of (B) a nonionic surfactant. The hard coat film is used for protection of surfaces such as the surface of touch panels and displays. Attachment of finger prints during input operations by fingers on the surfaces is suppressed and the attached finger prints can be easily wiped out. Scratch resistance and wear resistance of conventional hard coat films are retained.Type: GrantFiled: August 4, 2003Date of Patent: December 26, 2006Assignee: Lintec CorporationInventors: Satoru Shoshi, Osamu Inaoka, Yoshitaka Takesako
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Patent number: 7141298Abstract: A hard coat film comprises a hard coat layer formed by coating at least one face of a substrate with a coating fluid and curing the obtained coating layer by irradiation with an ionizing radiation. The coating fluid comprises a component for forming a hard coat layer comprising (A) a compound which is formed by bonding an organic compound having a polymerizable unsaturated group to fine particles of silica, (B) an ester of (meth)acrylic acid having an alicyclic structure and (C) a compound having at least two polymerizable unsaturated groups and at least one aryl group in a molecule. The hard coat layer comprises 20 to 60% by weight of silica and has a refractive index of 1.53 or greater. The hard coat film exhibits excellent scratch resistance, little shrinking by curing and little shrinking and curling under high temperature and humidity and forms no optical interference fringes.Type: GrantFiled: October 8, 2003Date of Patent: November 28, 2006Assignee: Lintec CorporationInventors: Satoru Shoshi, Yuki Hongo, Yoshitaka Takesako
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Patent number: 6896960Abstract: An anti-glare hard coat film comprising an anti-glare hard coat layer disposed on at least one face of a transparent substrate film, wherein the anti-glare hard coat layer comprises (A) a resin cured by an ionizing radiation and, per 100 parts by weight of the cured resin, 0.2 to 10 parts by weight of (B) fine particles of silica and 1 to 20 parts by weight of (C) fine particles of a silicone resin. When this film is used for various displays, the excellent anti-glare property can be provided without decreasing the highly fine quality of displayed images. This film is also advantageously used as a protective film having a great surface hardness.Type: GrantFiled: July 28, 2003Date of Patent: May 24, 2005Assignee: Lintec CorporationInventors: Satoru Shoshi, Osamu Inaoka, Yoshitaka Takesako
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Patent number: 6841272Abstract: A film for optical applications comprising (A) a hard coat layer which comprises a metal oxide and a substance cured by heat or by an ionizing radiation and has a thickness in a range of 2 to 20 ?m and (B) a low refractivity layer which comprises porous silica and a polysiloxane-based polymer and has a refractive index in a range of 1.30 to 1.45 and a thickness in a range of 40 to 200 nm, layers (A) and (B) being successively laminated at least on one face of a substrate film. The film exhibits an excellent property for preventing reflection of light and excellent scratch resistance and can be produced at a low cost.Type: GrantFiled: October 23, 2002Date of Patent: January 11, 2005Assignee: Lintec CorporationInventors: Satoru Shoshi, Yutaka Onozawa, Shigenobu Maruoka, Yoshitaka Takesako
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Publication number: 20040105987Abstract: The present invention provides a light transmitting hard coat film for use in touch panels, which comprises: (A) a light transmitting hard coat layer composed of a cured product of an ionizing-radiation-curable compound; (B) a high refractive index layer composed of a cured product of an ionizing-radiation-curable compound and containing antimony-doped tin oxide plus zirconium oxide and/or titanium oxide, as metal oxides, which has a refractive index in the range of 1.65 to 1.90 and a thickness of 30 to 160 nm; and (C) a low refractive index layer composed of a cured product of a siloxane-based curable compound which has a refractive index in the range of 1.40 to 1.55 and a thickness of 10 to 50 nm, all the layers being laminated on one side of a light transmitting base film in this order. The light transmitting hard coat film for use in touch panels has a high light transmittance and can produce transmitted light of blue color.Type: ApplicationFiled: November 17, 2003Publication date: June 3, 2004Applicant: LINTEC CORPORATIONInventors: Yuki Hongo, Satoru Shoshi, Yoshitaka Takesako
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Publication number: 20040081831Abstract: A hard coat film comprises a hard coat layer formed by coating at least one face of a substrate with a coating fluid and curing the obtained coating layer by irradiation with an ionizing radiation. The coating fluid comprises a component for forming a hard coat layer comprising (A) a compound which is formed by bonding an organic compound having a polymerizable unsaturated group to fine particles of silica, (B) an ester of (meth)acrylic acid having an alicyclic structure and (C) a compound having at least two polymerizable unsaturated groups and at least one aryl group in a molecule. The hard coat layer comprises 20 to 60% by weight of silica and has a refractive index of 1.53 or greater. The hard coat film exhibits excellent scratch resistance, little shrinking by curing and little shrinking and curling under high temperature and humidity and forms no optical interference fringes.Type: ApplicationFiled: October 8, 2003Publication date: April 29, 2004Applicant: LINTEC CORPORATIONInventors: Satoru Shoshi, Yuki Hongo, Yoshitaka Takesako
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Publication number: 20040071974Abstract: A hard coat film comprising a substrate film and a hard coat layer disposed at least on one face of the substrate film, wherein the hard coat layer comprises 100 parts by weight of (A) a resin of an ionizing radiation curing type and 0.1 to 10 parts by weight of (B) a nonionic surfactant. The hard coat film is used for protection of surfaces such as the surface of touch panels and displays. Attachment of finger prints during input operations by fingers on the surfaces is suppressed and the attached finger prints can be easily wiped out. Scratch resistance and wear resistance of conventional hard coat films are retained.Type: ApplicationFiled: August 4, 2003Publication date: April 15, 2004Applicant: LINTEC CORPORATIONInventors: Satoru Shoshi, Osamu Inaoka, Yoshitaka Takesako
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Publication number: 20040071986Abstract: An anti-glare hard coat film comprising an anti-glare hard coat layer disposed on at least one face of a transparent substrate film, wherein the anti-glare hard coat layer comprises (A) a resin cured by an ionizing radiation and, per 100 parts by weight of the cured resin, 0.2 to 10 parts by weight of (B) fine particles of silica and 1 to 20 parts by weight of (C) fine particles of a silicone resin. When this film is used for various displays, the excellent anti-glare property can be provided without decreasing the highly fine quality of displayed images. This film is also advantageously used as a protective film having a great surface hardness.Type: ApplicationFiled: July 28, 2003Publication date: April 15, 2004Applicant: LINTEC CORPORATIONInventors: Satoru Shoshi, Osamu Inaoka, Yoshitaka Takesako
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Publication number: 20030104188Abstract: A film for optical applications comprising (A) a hard coat layer which comprises a metal oxide and a substance cured by heat or by an ionizing radiation and has a thickness in a range of 2 to 20 &mgr;m and (B) a low refractivity layer which comprises porous silica and a polysiloxane-based polymer and has a refractive index in a range of 1.30 to 1.45 and a thickness in a range of 40 to 200 nm, layers (A) and (B) being successively laminated at least on one face of a substrate film. The film exhibits an excellent property for preventing reflection of light and excellent scratch resistance and can be produced at a low cost.Type: ApplicationFiled: October 23, 2002Publication date: June 5, 2003Applicant: LINTEC CORPORATIONInventors: Satoru Shoshi, Yutaka Onozawa, Shigenobu Maruoka, Yoshitaka Takesako