Patents by Inventor Yasuyoshi Fujii
Yasuyoshi Fujii 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: 11225540Abstract: A novel copolymer suitable for an optical film which is excellent in optical characteristics and has high retardation even in a thin film state, and an optical film containing the same are provided. A copolymer excellent in optical characteristics and easy to form a composite with a different polymer, and an optical film composed of the same are also provided.Type: GrantFiled: December 4, 2017Date of Patent: January 18, 2022Assignee: TOSOH CORPORATIONInventors: Yasuyoshi Fujii, Saki Ito
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Publication number: 20200095358Abstract: A novel copolymer suitable for an optical film which is excellent in optical characteristics and has high retardation even in a thin film state, and an optical film containing the same are provided. A copolymer excellent in optical characteristics and easy to form a composite with a different polymer, and an optical film composed of the same are also provided.Type: ApplicationFiled: December 4, 2017Publication date: March 26, 2020Applicant: TOSOH CORPORATIONInventors: Yasuyoshi FUJII, Saki ITO
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Patent number: 9512284Abstract: To provide a novel fumaric acid diester-cinnamic acid ester-based copolymer having a high molecular weight, which is expected to maintain excellent strength or ensures excellent toughness even when formed into a film, a method for efficiently producing the copolymer, and a film using the same. The fumaric acid diester-cinnamic acid ester-based copolymer contains a fumaric acid diester residue unit, a cinnamic acid ester residue unit having an alkyl group with a carbon number of 1 to 6, and a residue unit of a polyfunctional monomer having two or more radical polymerizable functional groups.Type: GrantFiled: November 25, 2013Date of Patent: December 6, 2016Assignee: TOSOH CORPORATIONInventors: Takahiro Kitagawa, Tohru Doi, Yasuyoshi Fujii, Kota Sakaguchi, Akira Inui, Masayasu Ito
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Patent number: 9321870Abstract: To provide a novel diisopropyl fumarate-cinnamic acid derivative-based copolymer expected to be formed into a retardation film having excellent optical properties ensuring that, for example, the refractive index in the film thickness direction and the out-of-plane retardation are large and even in the form of a thin film, the film has a high out-of-plane retardation, and a retardation film using the same. The diisopropyl fumarate-cinnamic acid derivative-based copolymer contains: a diisopropyl fumarate residue unit; and a cinnamic acid residue unit or a cinnamic acid ester residue unit having an alkyl group with a carbon number of 1 to 6.Type: GrantFiled: July 16, 2013Date of Patent: April 26, 2016Assignee: TOSOH CORPORATIONInventors: Takahiro Kitagawa, Shinsuke Toyomasu, Yasuyoshi Fujii
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Publication number: 20150291751Abstract: To provide a novel fumaric acid diester-cinnamic acid ester-based copolymer having a high molecular weight, which is expected to maintain excellent strength or ensures excellent toughness even when formed into a film, a method for efficiently producing the copolymer, and a film using the same. The fumaric acid diester-cinnamic acid ester-based copolymer contains a fumaric acid diester residue unit, a cinnamic acid ester residue unit having an alkyl group with a carbon number of 1 to 6, and a residue unit of a polyfunctional monomer having two or more radical polymerizable functional groups.Type: ApplicationFiled: November 25, 2013Publication date: October 15, 2015Applicant: TOSOH CORPORATIONInventors: Takahiro Kitagawa, Tohru Doi, Yasuyoshi Fujii, Kota Sakaguchi, Akira Inui, Masayasu Ito
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Publication number: 20150232599Abstract: To provide a novel diisopropyl fumarate-cinnamic acid derivative-based copolymer expected to be formed into a retardation film having excellent optical properties ensuring that, for example, the refractive index in the film thickness direction and the out-of-plane retardation are large and even in the form of a thin film, the film has a high out-of-plane retardation, and a retardation film using the same. The diisopropyl fumarate-cinnamic acid derivative-based copolymer contains: a diisopropyl fumarate residue unit; and a cinnamic acid residue unit or a cinnamic acid ester residue unit having an alkyl group with a carbon number of 1 to 6.Type: ApplicationFiled: July 16, 2013Publication date: August 20, 2015Applicant: TOSOH CORPORATIONInventors: Takahiro Kitagawa, Shinsuke Toyomasu, Yasuyoshi Fujii
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Publication number: 20090130521Abstract: For a plate solid oxide fuel cell, costs thereof are made low and the thermal conductivity thereof is improved, and further only by effect of the shape thereof, a burning gas is sealed while a back diffusion phenomenon of air from the outside is restrained. Plate-shaped unit cells 1 each composed of a plate-shaped solid electrolyte 2, and a fuel electrode 4 and an air electrode 3 arranged on both side surfaces thereof, respectively, are arranged to be alternated with metallic separators 10. A fuel supplying room S1 is formed between the fuel electrode 4 and one of the metallic separators 10; and an air supplying room S2 is formed between the air electrode 3 and one of the metallic separator 10. A peripheral edge 2a of the solid electrolyte 2 overhangs outwards from the fuel electrode 4 and the air electrode 3, and is sandwiched directly from both sides thereof between two metal plates 21 and 22. Peripheral edges of the two metal plates 21 and 22 overhang outwards from the solid electrolyte 2.Type: ApplicationFiled: June 19, 2007Publication date: May 21, 2009Applicant: YANMAR CO., LTDInventor: Yasuyoshi Fujii
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Publication number: 20010002559Abstract: A method for producing cutting tools incorporated in the present invention is carried out as follows: a shank portion and a drill portion are formed separately such that the inner diameter of a hole made in the shank portion is slightly smaller than the outer diameter of the drill portion. The rear of the drill portion is forcibly inserted into the hole of the shank portion at normal temperature which is room temperature. The diameter of the inner wall of the hole is thereby enlarged, resulting in a tight fitting. After the insertion of the drill portion in the shank portion, the drill portion may be ground to form a drill edge. Before the insertion of the drill portion in the shank portion, the shank portion may be quenched under vacuum or the like, or the surface of the shank portion may be hardened by nitriding.Type: ApplicationFiled: January 31, 2001Publication date: June 7, 2001Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Yasuyoshi Fujii, Seiji Matsuura, Kazuhiro Kaneko
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Patent number: 6200076Abstract: A method for producing cutting tools incorporated in the present invention is carried out as follows: a shank portion and a drill portion are formed separately such that the inner diameter of a hole made in the shank portion is slightly smaller than the outer diameter of the drill portion. The rear of the drill portion is forcibly inserted into the hole of the shank portion at normal temperature which is room temperature. The diameter of the inner wall of the hole is thereby enlarged, resulting in a tight fitting. After the insertion of the drill portion in the shank portion, the drill portion may be ground to form a drill edge. Before the insertion of the drill portion in the shank portion, the shank portion may be quenched under vacuum or the like, or the surface of the shank portion may be hardened by nitriding.Type: GrantFiled: February 4, 2000Date of Patent: March 13, 2001Assignee: Mitsubishi Materials CorporationInventors: Yasuyoshi Fujii, Seiji Matsuura, Kazuhiro Kaneko
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Patent number: 6058807Abstract: A method for producing cutting tools incorporated in the present invention is carried out as follows: a shank portion and a drill portion are formed separately such that the inner diameter of a hole made in the shank portion is slightly smaller than the outer diameter of the drill portion. The rear of the drill portion is forcibly inserted into the hole of the shank portion at normal temperature which is room temperature. The diameter of the inner wall of the hole is thereby enlarged, resulting in a tight fitting. After the insertion of the drill portion in the shank portion, the drill portion may be ground to form a drill edge. Before the insertion of the drill portion in the shank portion, the shank portion may be quenched under vacuum or the like, or the surface of the shank portion may be hardened by nitriding.Type: GrantFiled: January 29, 1998Date of Patent: May 9, 2000Assignee: Mitsubishi Materials CorporationInventors: Yasuyoshi Fujii, Seiji Matsuura, Kazuhiro Kaneko