Patents by Inventor Takao Doi
Takao Doi 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: 11926917Abstract: There is provided a composite plating material and a related technique thereof, the composite plating material including: a base material, and a composite plating layer on the base material, the composite plating layer comprising a composite material containing carbon particles and Sb in an Ag layer, with a carbon content of 6.0 mass % or more and a Sb content of 0.5 mass % or more.Type: GrantFiled: June 10, 2020Date of Patent: March 12, 2024Assignee: DOWA METALTECH CO., LTD.Inventors: Yukiya Kato, Hirotaka Kotani, Tatsuhiro Doi, Takao Tomiya, Hiroto Narieda
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Patent number: 11920255Abstract: There are provided a composite plated product wherein a composite plating film of a composite material containing carbon particles in a silver layer is formed on a base material and wherein the amount of the carbon particles dropped out of the composite plating film is small, and a method for producing the same. After a composite plating film of a composite material containing carbon particles in a silver layer is formed on a base material (of preferably copper or a copper alloy) by electroplating using a silver-plating solution to which the carbon particles are added, a treatment for removing part of the carbon particles on the surface thereof is carried out.Type: GrantFiled: June 4, 2020Date of Patent: March 5, 2024Assignee: Dowa Metaltech Co., Ltd.Inventors: Hirotaka Kotani, Yukiya Kato, Tatsuhiro Doi, Takao Tomiya, Hiroto Narieda
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Publication number: 20140110328Abstract: The forward osmosis membrane flow system (1) includes a high osmotic pressure fluid flow section (2) to which a high osmotic pressure fluid is supplied, a low osmotic pressure fluid flow section (3) to which a low osmotic pressure fluid with a lower osmotic pressure than that of the high osmotic pressure fluid is supplied, and a semipermeable membrane (4) that separates the high osmotic pressure fluid flow section and the low osmotic pressure fluid flow section from each other. A flow rate in the high osmotic pressure fluid flow section (2) is increased by an occurrence of fluid migration from the low osmotic pressure fluid flow section (3) into the high osmotic pressure fluid flow section (2) through the semipermeable membrane (4). The semipermeable membrane (4) is a composite semipermeable membrane with a polyamide-based skin layer formed on a porous epoxy resin membrane.Type: ApplicationFiled: June 8, 2012Publication date: April 24, 2014Applicant: NITTO DENKO CORPORATIONInventors: Takao Doi, Osamu Hayashi, Masahiko Hirose, Makoto Kobuke, Yoshihide Kawaguchi, Noriaki Harada
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Patent number: 6958407Abstract: A phenyl ester is produced by allowing benzene, a carboxylic acid and molecular oxygen to react with each other in the presence of a catalyst comprising (A) palladium, (B) at least one element selected from elements of groups 13, 14, 15, and 16 and the fourth to sixth periods of the periodic table, and (C) at least one element selected from elements of groups 3, 4 and lanthanoid elements of the periodic table. Preferably, element (B) is selected from elements of group 16 and the fourth to sixth periods of the periodic table, and element (C) is contained in a metal oxide form in the catalyst. The catalytic activity can be maintained at a high level, and a phenyl ester is stably produced. The phenyl ester can be converted to phenol by a conventional procedure.Type: GrantFiled: November 4, 2004Date of Patent: October 25, 2005Assignee: Tosoh CorporationInventors: Yoshihiko Mori, Takao Doi, Tetsuo Asakawa, Takanori Miyake
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Publication number: 20050138877Abstract: In order to obtain a plane lattice hollow concrete slab having a high workability and a high sound insulating property, and a cross arm brace used in the plane lattice hollow concrete slab, the plane lattice hollow concrete slab comprises a light weight body 5 buried in a small space 4 which is partitioned on a grid by upper reinforcing bars 3a and 3b and lower reinforcing bars 2a and 2b positioned on a grid in a slab. The light weight body is a solid-core or a hollow light weight ball body. The light weight body has a diameter which passes through a top surface of the small space and which does not pass through a side surface of the small space. The light weight body is fixed to a predetermined position by a cross arm brace which is positioned on the upper reinforcing bar.Type: ApplicationFiled: December 30, 2003Publication date: June 30, 2005Inventors: Kenji Inoue, Hisao Inokuchi, Takayuki Ueda, Takao Doi
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Patent number: 6875508Abstract: A fiber capable of forming a metal chelate and a process for producing the same are disclosed, wherein the fiber is characterized in that at least one metal chelate-forming compound selected from the group consisting of aminodicarboxylic acids, aminocarboxylic acids, thiocarboxylic acids and phosphoric acid, which are reactive with a glycidyl group, is bonded to a molecule of a natural fiber or regenerated fiber through a crosslinkable compound having a reactive double bond and a glycidyl group in its molecule. There are also disclosed a method of capturing metal ions using the fiber and a metal chelate fiber which can effectively make use of the characteristics of the metals and can be easily discarded or incinerated.Type: GrantFiled: February 24, 2000Date of Patent: April 5, 2005Assignees: Chelest Corporation, Chubu Chelest Co., Ltd.Inventors: Nobuyoshi Nambu, Osamu Ito, Shiho Horiuchi, Takao Doi
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Patent number: 6872317Abstract: A chelate-forming filter which comprises a filter medium made of natural, regenerated, or synthetic fibers wherein the fiber molecules have, incorporated therein, chelate-forming functional groups represented by general formula (1) [wherein G represents a residue of a chain sugar alcohol or of a polyhydric alcohol; and R represents hydrogen, (lower) alkyl, or -G (wherein G has the same meaning as the above G, and the two G's may be the same or different)] or (3) (wherein R1, R2, and R3 each represents lower alkylene; and n is an integer of 1 to 4).Type: GrantFiled: April 16, 1999Date of Patent: March 29, 2005Assignee: Chelest Corporation and Chubu Chelest Co., Ltd.Inventors: Nobuyoshi Nambu, Osamu Ito, Nobutake Mihara, Takao Doi
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Publication number: 20050065363Abstract: A phenyl ester is produced by allowing benzene, a carboxylic acid and molecular oxygen to react with each other in the presence of a catalyst comprising (A) palladium, (B) at least one element selected from elements of groups IIIb, IVb, Vb and VIb of the periodic table, and (C) at least one element selected from elements of groups IIIa and IVa of the periodic table. Preferably, element (B) is selected from elements of group VIb of the periodic table, and element (C) is contained in a metal oxide form in the catalyst. The catalytic activity can be maintained at a high level, and a phenyl ester is stably produced. The phenyl ester can be converted to phenol by a conventional procedure.Type: ApplicationFiled: November 4, 2004Publication date: March 24, 2005Inventors: Yoshihiko Mori, Takao Doi, Tetsuo Asakawa, Takanori Miyake
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Patent number: 6869537Abstract: A fiber capable of forming a metal chelate and a process for producing the same are disclosed, wherein the fiber is characterized in that at least one metal chelate-forming compound selected from the group consisting of aminocarboxylic acid, aminocarboxylic acid, thiocarboxylic acid and phosphoric acid, which are reactive with a glycidyl group, is bonded to a molecule of a synthetic fiber through a crosslinkable compound having a reactive double bond and a glycidyl group in its molecule. The chelate-forming fiber is excellent in capturing harmful heavy metal ions and can be easily produced in a simple and safe way at a low cost.Type: GrantFiled: May 22, 2000Date of Patent: March 22, 2005Assignees: Chubu Chelest Co., Ltd., Chelest CorporationInventors: Nobuyoshi Nambu, Osamu Ito, Takao Doi
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Patent number: 6815394Abstract: A phenyl ester is produced by allowing benzene, a carboxylic acid and molecular oxygen to react with each other in the presence of a catalyst comprising (A) palladium, (B) at least one element selected from elements of groups 13, 14, 15, and 16 and the fourth to sixth periods of the periodic table, and (C) at least one element selected from elements of groups 3, 4 and lanthanoid elements of the periodic table. Preferably, element (B) is selected from elements of group 16 and the fourth to sixth periods of the periodic table, and element (C) is contained in a metal oxide form in the catalyst.Type: GrantFiled: November 13, 2002Date of Patent: November 9, 2004Assignee: Tosoh CorporationInventors: Yoshihiko Mori, Takao Doi, Tetsuo Asakawa, Takanori Miyake
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Patent number: 6780934Abstract: A room temperature-setting composition containing a polyoxyalkylene polymer (A) having a molecular weight ranging from 8000 to 50000 and having hydrolyzable silicon groups of the following formula (1): —SiXaR13−a (1) wherein R1 is a C1-20 substituted or unsubstituted monovalent organic group, X is a hydroxyl group or a hydrolyzable group, a is 1, 2 or 3, provided that when more than one R1 group is present, the R1 groups may be the same or different, and when more than one X group is present, the X groups may be the same or different, the composition comprising, as an essential component, the polyoxyalkylene polymer, having a molecular weight ranging from 8000 to 50000 and having hydrolyzable silicon groups of formula (1), wherein a is 3, or the composition comprises a polyoxyalkylene polymer component as defined above which contains said essential specific polyoxyalkylene polymer component, and a polymer (B) made by polymerization of a polymerizable unsaturated group-containing monomType: GrantFiled: August 29, 2002Date of Patent: August 24, 2004Assignee: Asahi Glass Company Ltd.Inventors: Takao Doi, Takashi Watabe, Tomoko Matsumoto, Tatsuo Onoguchi, Kaori Tsuruoka
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Publication number: 20030092863Abstract: A room temperature-setting composition containing a polyoxyalkylene polymer (A) having a molecular weight ranging from 8000 to 50000 and having hydrolyzable silicon groups of the following formula (1):Type: ApplicationFiled: August 29, 2002Publication date: May 15, 2003Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Takao Doi, Takashi Watabe, Tomoko Matsumoto, Tatsuo Onoguchi, Kaori Tsuruoka
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Patent number: 6528679Abstract: A phenyl ester is produced by allowing benzene, a carboxylic acid and molecular oxygen to react with each other in the presence of a catalyst comprising (A) palladium, (B) at least one element selected from elements of groups 13, 14, 15, and 16 and the fourth to sixth periods of the periodic table, and (C) at least one element selected from elements of groups 3, 4 and lanthanoid elements of the periodic table. Preferably, element (B) is selected from elements of group 16 and the fourth to sixth periods of the periodic table, and element (C) is contained in a metal oxide form in the catalyst. The phenyl ester can be converted to phenol by hydrolysis or ester exchange.Type: GrantFiled: September 27, 2000Date of Patent: March 4, 2003Assignee: Tosoh CorporationInventors: Yoshihiko Mori, Takao Doi, Tetsuo Asakawa, Takanori Miyake
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Patent number: 6207766Abstract: The present invention provides a room temperature-setting composition containing a polyoxyalkylene polymer (A), having a molecular weight of from 8000 to 50000 and having hydrolyzable silicon groups of the following formula (1), which comprises, as an essential component, the polyoxyalkylene polymer, having a molecular weight of from 8000 to 50000 and having hydrolyzable silicon groups of the formula (1), wherein a is 3 and a room temperature-setting composition containing a polyoxyalkylene polymer (A) having a molecular weight of from 8000 to 50000 and having hydrolyzable silicon groups of the formula (1), which comprises, as essential components, the polyoxyalkylene polymer having a molecular weight of from 8000 to 50000 and having hydrolyzable silicon groups of the formula (1) wherein a is 3, and a polymer (B) made by polymerization of a polymerizable unsaturated group-containing monomer (C): —SiXaR13−a (1) wherein R1 is a C1-20 substituted or unsubstituted monovalent organic groupType: GrantFiled: December 21, 1998Date of Patent: March 27, 2001Assignee: Asahi Glass Company Ltd.Inventors: Takao Doi, Takashi Watabe, Tomoko Matsumoto, Tatsuo Onoguchi, Kaori Tsuruoka
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Patent number: 5973096Abstract: A process for purifying a polyether, which comprises adding to a polyether (A) containing a first salt, water (B) and a compound (C) which is capable of reacting with an ion constituting the first salt to form a second salt which is essentially insoluble in the polyether (A), then removing water, followed by removing the second salt from the polyether (A).Type: GrantFiled: December 16, 1997Date of Patent: October 26, 1999Assignee: Asahi Glass Company Ltd.Inventors: Takashi Watabe, Hiroshi Hatano, Kazunori Chiba, Takao Doi, Toru Ueno, Etsuko Sakai, Minoru Yamada, Shinya Saiki, Hirotsugu Yamamoto, Toshihiko Higuchi
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Patent number: 5811566Abstract: A process for purifying a polyether, which comprises adding to a polyether (A) containing a first salt, water (B) and a compound (C) which is capable of reacting with an ion constituting the first salt to form a second salt which is essentially insoluble in the polyether (A), then removing water, followed by removing the second salt from the polyether (A).Type: GrantFiled: July 17, 1995Date of Patent: September 22, 1998Assignee: Asahi Glass Company Ltd.Inventors: Takashi Watabe, Hiroshi Hatano, Kazunori Chiba, Takao Doi, Toru Ueno, Etsuko Sakai, Minoru Yamada, Shinya Saiki, Hirotsugu Yamamoto, Toshihiko Higuchi
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Patent number: 5438107Abstract: A condensed resin dispersion having fine particles of a condensed resin dispersed stably in a polyether polyol (c), the condensed resin being a reaction product of an aldehyde and a compound condensable with the aldehyde, or of their precondensate, wherein the fine particles of the condensed resin are fine condensed resin particles formed by the reaction and precipitation conducted in an isocyanate-modified polyether (b) obtained by reacting an organic polyisocyanate to a polyether (a) having at least one active hydrogen group reactive with an isocyanate group, or to such a polyether (a) and a low molecular weight active hydrogen-containing compound having at least one active hydrogen group, and having substantially no free isocyanate group.Type: GrantFiled: September 16, 1993Date of Patent: August 1, 1995Assignee: Asahi Glass Company Ltd.Inventors: Takao Doi, Noriko Itaya, Masami Yamashita
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Patent number: 5434005Abstract: An aqueous composition comprising a carboxylate group-containing blocked polyurethane and water as essential components, wherein said polyurethane is a reaction product of a carboxylic acid (or carboxylate) group-containing polyoxyalkylene polyol containing at least 50% by weight of oxyethylene groups, with an average number of hydroxyl groups being more than 2 and having, on an average, from 0.005 to 0.8 --COOX group (X: a hydrogen atom or a cation) per molecule at the backbone chain terminals, a polyisocyanate having isocyanate groups in an amount stoichiometrically in excess of the hydroxyl groups of said polyol, and a blocking agent in an amount corresponding to the stoichiometrically excess amount of said polyisocyanate, and when X is a hydrogen atom, X is converted to a cation at an optional stage.Type: GrantFiled: March 12, 1993Date of Patent: July 18, 1995Assignee: Asahi Glass Company Ltd.Inventors: Tomiya Sugiura, Hideki Nakagawa, Takao Doi, Shigeyuki Kozawa
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Patent number: 5344874Abstract: A process for producing a condensed resin dispersion, which comprises subjecting an aldehyde and a compound condensable with the aldehyde, or their precondensate, to a condensation reaction in a dispersion medium consisting essentially of water and/or an organic solvent, to precipitate fine condensed resin particles which hardly settle in said dispersion medium, and then replacing the water and/or the organic solvent by an active hydrogen-containing compound having at least two active hydrogen-containing groups reactive with isocyanate groups.Type: GrantFiled: July 8, 1991Date of Patent: September 6, 1994Assignee: Asahi Glass Company Ltd.Inventors: Takao Doi, Noriko Itaya, Masami Yamashita, Nobuaki Kunii
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Patent number: 5290898Abstract: A condensed resin dispersion having fine particles of a condensed resin dispersed stably in a polyether polyol (c), the condensed resin being a reaction product of an aldehyde and a compound condensable with the aldehyde, or of their precondensate, wherein the fine particles of the condensed resin are fine condensed resin particles formed by the reaction and precipitation conducted in an isocyanate-modified polyether (b) obtained by reacting an organic polyisocyanate to a polyether (a) having at least one active hydrogen group reactive with an isocyanate group, or to such a polyether (a) and a low molecular weight active hydrogen-containing compound having at least one active hydrogen group, and having substantially no free isocyanate group.Type: GrantFiled: October 14, 1992Date of Patent: March 1, 1994Assignee: Asahi Glass Company Ltd.Inventors: Takao Doi, Noriko Itaya, Masami Yamashita