Patents by Inventor Kazuhiro Tanahashi
Kazuhiro Tanahashi 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: 11912217Abstract: A vehicle is positively charged with static electricity due to an external factor. The vehicle includes a battery, a static eliminator sheet, and a holding member. The battery includes at least one cell, an electrolyte, a resin case, and negative and positive terminals. The resin case accommodates the components and electrolyte of each cell. The negative terminal is grounded to the vehicle body. The positive terminal is supplied with electric power from a charger. The static eliminator sheet is made of a material on a positive side of a triboelectric series with respect to a material of the resin case. The holding member holds the static eliminator sheet and the resin case in contact with each other. The holding member holds the battery at a predetermined location of the vehicle body in a state where the resin case and the static eliminator sheet are slidable due to vehicle body vibrations.Type: GrantFiled: February 24, 2023Date of Patent: February 27, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Koushi Yamada, Junichi Sudo, Kenichiro Sakurai, Kazuhiro Maeda, Toshio Tanahashi
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Publication number: 20220251372Abstract: A polymer composition contains polylactic acid and a dilactide/?-caprolactone copolymer, in which a content of the polylactic acid relative to a total of 100 mass % of the polylactic acid and the dilactide/?-caprolactone copolymer is 20 to 40 mass %, and in which the dilactide/?-caprolactone copolymer satisfies (1) an R value represented by a following formula is 0.45 or more and 0.99 or less: R = [ AB ] ? / ? ( 2 ? [ A ] ? [ B ] ) × 100 where [A] is a molar fraction (%) of a dilactide residue in the dilactide/?-caprolactone copolymer, [B] is a molar fraction (%) of an ?-caprolactone residue in the dilactide/?-caprolactone copolymer, and [AB] is a molar fraction (%) of a structure in which a dilactide residue and an ?-caprolactone residue are adjacent to each other (A-B and B-A) in the dilactide/?-caprolactone copolymer, and (2) at least one of the dilactide residue and the ?-caprolactone residue has a degree of crystallization of less than 14%.Type: ApplicationFiled: May 26, 2020Publication date: August 11, 2022Inventors: Kenichi Harimoto, Kanta Tanabe, Kazuhiro Tanahashi, Hirokazu Sakaguchi
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Patent number: 11371172Abstract: A tubular woven fabric is useful as a transport hose for a fluid or a powder, as a protective hose for linear bodies such as wires, cables and conduits, as a tubular filter, or as a base material of a vascular prosthesis. The tubular woven fabric includes warp yarns and weft yarns interwoven with each other, the tubular woven fabric having an outer diameter with a variation of within 10% along the warp direction and satisfying the formula: (L2?L1)/L1?0.1.Type: GrantFiled: September 29, 2017Date of Patent: June 28, 2022Assignee: Toray Industries, Inc.Inventors: Nobuaki Tanaka, Hiroshi Tsuchikura, Satoshi Yamada, Yuichi Koyamatsu, Taisuke Kogawa, Yuka Sakaguchi, Kazuhiro Tanahashi
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Publication number: 20220062513Abstract: A medical base material for an indwelling cardiovascular device in which a unique knitted structure made of multifilaments containing ultra-fine fibers can maintain the antithrombotic property through the early endothelialization has improved storage property in a sheath catheter and mechanical strength. The medical base material includes a knitted fabric made of multifilaments containing 30 wt % or more of ultra-fine fibers having a single thread diameter of 1 ?m to 10 ?m, and heparin, a heparin derivative, or a pharmaceutically acceptable salt thereof, which is chemically bound to the surface of the ultra-fine fibers, wherein: the knitted fabric has a basis weight of 5 mg/cm2 to 20 mg/cm2, a thickness of 200 ?m or less, and a water permeability of 1000 mL/min/cm2 to 10,000 mL/min/cm2 at a pressure of 120 mmHg.Type: ApplicationFiled: January 30, 2020Publication date: March 3, 2022Inventors: So Kakiyama, Satoshi Yamada, Nobuaki Tanaka, Kazuhiro Tanahashi
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Patent number: 11253539Abstract: A medical material uses a nickel-titanium alloy wherein a polyelectrolyte has a reduced thickness while a sufficient amount of an antithrombogenic compound for production of a therapeutic effect is supported. The medical material in which a porous surface is formed on a nickel-titanium alloy to allow infiltration of a polyelectrolyte into the pores, to thereby reduce the thickness of the polyelectrolyte exposed on the surface of the nickel-titanium alloy while allowing supporting of a sufficient amount of an antithrombogenic compound due to contribution of the polyelectrolyte infiltrate.Type: GrantFiled: September 28, 2018Date of Patent: February 22, 2022Assignee: Toray Industries, Inc.Inventors: So Kakiyama, Koji Kadowaki, Kazuhiro Tanahashi
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Patent number: 11155785Abstract: The present invention provides a hollow fiber membrane module which makes it possible to concentrate incubated platelets by efficiently removing water from an incubated platelet suspension liquid containing incubated platelets while suppressing deterioration of the function of the incubated platelets. The present invention provides an incubated platelet concentration module in which a plurality of hollow fiber membranes each having pores with an average pore diameter of 2 ?m or less on a surface of the hollow fiber membrane are packed in a casing having at least one inlet for supplying an incubated platelet suspension liquid before concentration into the hollow fiber membranes, wherein a value (X/Y1) obtained by dividing a total cross-sectional area (X) of the plurality of hollow fiber membranes by a total cross-sectional area (Y1) of the least one inlet is 4.0 or less.Type: GrantFiled: September 25, 2017Date of Patent: October 26, 2021Inventors: Kenichi Harimoto, Hirokazu Sakaguchi, Kota Hatta, Kazuhiro Tanahashi
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Publication number: 20210322650Abstract: A cylindrical body for an implant is capable of maintaining a high patency rate by achieving a good antithrombogenicity, a low swelling property and a low Young's modulus. A cylindrical body for an implant includes: a cylindrical substrate having an elongation rate in the longitudinal direction, as measured under a tensile load of 20 N, of from 5 to 100%; and a block copolymer composed of a polyalkylene glycol block(s) and a polyhydroxyalkanoic acid block(s); wherein the ratio of the mass of the polyalkylene glycol with respect to the total mass of the block copolymer is 5 to 25%; and a film composed of the block copolymer has a Young's modulus of 200 MPa or less.Type: ApplicationFiled: August 30, 2019Publication date: October 21, 2021Inventors: Taisuke Kogawa, Masaki Fujita, Kazuhiro Tanahashi, Satoshi Yamada, Nobuaki Tanaka, Hiroshi Tsuchikura
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Patent number: 11078327Abstract: A polyester copolymer has two types of ester bond-forming monomer residues as main structural units when the two types of ester bond-forming monomers are defined as “monomer A” and “monomer B”, respectively, the polyester copolymer satisfies (1) and (2): (1) an R value represented by equation: R value=[AB]/(2[A][B])×100 [A]: mole fraction of monomer A residues in the polyester copolymer [% by mol], [B]: mole fraction of monomer B residues in the polyester copolymer [% by mol], and [AB]: mole fraction of a structure in which the monomer A residues and the monomer B residues are adjacent to each other (A-B and B-A) in the polyester copolymer [% by mol], is 0.45 or more and 0.99 or less; and (2) a crystallization rate of at least one of the monomer A residues and the monomer B residues is less than 14%.Type: GrantFiled: August 1, 2018Date of Patent: August 3, 2021Assignee: Toray Industries, Inc.Inventors: Yoshinori Kakizawa, Koji Kadowaki, Kazuhiro Tanahashi, Hirokazu Sakaguchi, Kazuyuki Kidoba
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Patent number: 10940229Abstract: A material for adhesion prevention can be adhered to biological tissue with certainty and has improved tissue adhesiveness and biodegradability. Such material for adhesion prevention is composed of: a 1- to 1,000-?m-thick water-soluble support layer comprising a water-soluble polymer; and a 1- to 1,000-?m-thick adhesion prevention layer comprising a biodegradable polymer. The biodegradable polymer has a structure in which a branched polyalkylene glycol comprising 3 to 8 terminal hydroxyl groups per molecule is bound to a polyhydroxy alkanoic acid, and a mass ratio of the branched polyalkylene glycol relative to the total mass is 1% to 30%.Type: GrantFiled: September 29, 2017Date of Patent: March 9, 2021Assignees: Toray Industries, Inc., Nanotheta Co., Ltd.Inventors: Akihiro Saito, Megumi Nakanishi, Kazuhiro Tanahashi, Toru Arakane, Motonori Hochi, Ai Suzuki, Koji Okabayashi, Shinji Takeoka, Toshinori Fujie, Yuya Ishiduka, Shinya Ohtsubo
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Publication number: 20210038364Abstract: There is provided a plain-weave fabric excellent in low air permeability and waterproofness. Further, there is provided a stent graft excellent in low water permeability mechanical properties and catheter storage capacity, including the plain-weave fabric as a graft substrate. A plain-weave fabric woven by interlacing weaving yarns in warp and weft, in which weaving yarns YA and YB arranged in the same direction have different crimp ratios A and B, respectively, a relationship thereof satisfies Formula 1, and the crimp ratio B is 4% or more, and the plain-weave fabric is preferably used for a stent graft; A?B×1.2.Type: ApplicationFiled: January 15, 2019Publication date: February 11, 2021Applicant: Toray Industries, Inc.Inventors: Nobuaki Tanaka, Hiroshi Tsuchikura, So Kakiyama, Kazuhiro Tanahashi
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Publication number: 20210007838Abstract: A tubular woven fabric is useful as a transport hose for a fluid or a powder, as a protective hose for linear bodies such as wires, cables and conduits, as a tubular filter, or as a base material of a vascular prosthesis. The tubular woven fabric includes warp yarns and weft yarns interwoven with each other, the tubular woven fabric having an outer diameter with a variation of within 10% along the warp direction and satisfying the formula: (L2?L1)/L1?0.1.Type: ApplicationFiled: September 29, 2017Publication date: January 14, 2021Inventors: Nobuaki Tanaka, Hiroshi Tsuchikura, Satoshi Yamada, Yuichi Koyamatsu, Taisuke Kogawa, Yuka Sakaguchi, Kazuhiro Tanahashi
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Publication number: 20210002432Abstract: A biodegradable block copolymer has high conformability and excellent degradability. The block copolymer including a polyalkylene glycol block and a polyhydroxyalkanoic acid block, wherein the mass ratio of the polyalkylene glycol block with respect to the total mass is 10 to 60%; the carbonyl carbon has a carbon nuclear relaxation time T1? of not more than 20 ms; and the block copolymer satisfies Equation (1): ?=?1×?2>20 (1) ?1: crystallization rate of the polyalkylene glycol block; ?2: crystallization rate of a poly-A block, wherein A represents, among the repeat units contained in the polyhydroxyalkanoic acid block, a repeat unit whose homopolymer composed of the same repeat units has a highest crystallization rate.Type: ApplicationFiled: January 25, 2019Publication date: January 7, 2021Inventors: Taisuke Kogawa, Masaki Fujita, Yuichi Koyamatsu, Kazuhiro Tanahashi, Kazuyuki Kidoba
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Patent number: 10822677Abstract: A forged component having a chemical composition including, by mass %, C: 0.30 to 0.45%, Si: 0.05 to 0.35%, Mn: 0.50 to 0.90%, P: 0.030 to 0.070%, S: 0.040 to 0.070%, Cr: 0.01 to 0.50%, Al: 0.001 to 0.050%, V: 0.25 to 0.35%, Ca: 0 to 0.0100%, N: 0.0150% or less, and the balance being Fe and unavoidable impurities, and satisfying formula 1. Metal structure is a ferrite pearlite structure, and a ferrite area ratio is 30% or more. Vickers hardness is in the range of 320 to 380 HV. 0.2% yield strength is 800 MPa or more. A Charpy V-notch impact value is in the range of 7 to 15 J/cm2.Type: GrantFiled: March 18, 2014Date of Patent: November 3, 2020Assignees: AICHI STEEL CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeyuki Uenishi, Susumu Owaki, Hisanori Koma, Tomoyasu Kitano, Kazuhiro Tanahashi, Nobuyuki Shinohara
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Patent number: 10709822Abstract: An antithrombogenic metallic material includes a metallic material whose surface is coated with a coating material, the coating material containing: a phosphonic acid derivative or a catechol derivative; a polymer containing, as a constituent monomer, a compound selected from the group consisting of alkyleneimines, vinylamines, allylamines, lysine, protamine, and diallyldimethylammonium chloride; and an anionic compound containing a sulfur atom and having anticoagulant activity; the polymer being covalently bound to the phosphonic acid derivative or the catechol derivative, the phosphonic acid derivative or the catechol derivative being bound to the metallic material through a phosphonic acid group or a catechol group thereof, wherein the abundance ratio of nitrogen atoms to the abundance of total atoms as measured by X-ray photoelectron spectroscopy (XPS) on the surface is 4.0 to 13.0 atomic percent.Type: GrantFiled: March 31, 2016Date of Patent: July 14, 2020Assignee: Toray Industries, Inc.Inventors: Koji Kadowaki, Masaki Fujita, Yuka Sakaguchi, Kazuhiro Tanahashi
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Publication number: 20200215098Abstract: A medical material uses a nickel-titanium alloy wherein a polyelectrolyte has a reduced thickness while a sufficient amount of an antithrombogenic compound for production of a therapeutic effect is supported. The medical material in which a porous surface is formed on a nickel-titanium alloy to allow infiltration of a polyelectrolyte into the pores, to thereby reduce the thickness of the polyelectrolyte exposed on the surface of the nickel-titanium alloy while allowing supporting of a sufficient amount of an antithrombogenic compound due to contribution of the polyelectrolyte infiltrate.Type: ApplicationFiled: September 28, 2018Publication date: July 9, 2020Inventors: So Kakiyama, Koji Kadowaki, Kazuhiro Tanahashi
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Publication number: 20200216607Abstract: A polyester copolymer has two types of ester bond-forming monomer residues as main structural units when the two types of ester bond-forming monomers are defined as “monomer A” and “monomer B”, respectively, the polyester copolymer satisfies (1) and (2): (1) an R value represented by equation: R value=[AB]/(2[A][B])×100 [A]: mole fraction of monomer A residues in the polyester copolymer [% by mol], [B]: mole fraction of monomer B residues in the polyester copolymer [% by mol], and [AB]: mole fraction of a structure in which the monomer A residues and the monomer B residues are adjacent to each other (A-B and B-A) in the polyester copolymer [% by mol], is 0.45 or more and 0.99 or less; and (2) a crystallization rate of at least one of the monomer A residues and the monomer B residues is less than 14%.Type: ApplicationFiled: August 1, 2018Publication date: July 9, 2020Inventors: Yoshinori Kakizawa, Koji Kadowaki, Kazuhiro Tanahashi, Hirokazu Sakaguchi, Kazuyuki Kidoba
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Patent number: 10660738Abstract: A treatment aiding device includes a flexible shaft; a filter; linear supporting members; an elastomer member composed of an elastomer in which a penetrating hole is formed, which elastomer member is arranged in the proximal side relative to the opening section of the filter such that the shaft penetrates the penetrating hole, wherein the outer diameter of the end face in which the penetrating hole is formed is larger than the outer diameter of the opening-section side of the filter when the filter is closed; and an outer tube in which a penetrating hole is formed, which outer tube is arranged in the proximal side relative to the opening section of the filter such that the shaft penetrates the penetrating hole in a state which allows movement of the shaft in the longitudinal direction; wherein the elastomer member is fixed in the distal side of the outer tube.Type: GrantFiled: May 8, 2015Date of Patent: May 26, 2020Assignees: Toray Industries, Inc.Inventors: Kanji Inoue, Takahiro Yagi, Masaki Fujita, Koji Kadowaki, Kazuhiro Tanahashi
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Publication number: 20200024575Abstract: The present invention provides a hollow fiber membrane module which makes it possible to concentrate incubated platelets by efficiently removing water from an incubated platelet suspension liquid containing incubated platelets while suppressing deterioration of the function of the incubated platelets. The present invention provides an incubated platelet concentration module in which a plurality of hollow fiber membranes each having pores with an average pore diameter of 2 ?m or less on a surface of the hollow fiber membrane are packed in a casing having at least one inlet for supplying an incubated platelet suspension liquid before concentration into the hollow fiber membranes, wherein a value (X/Y1) obtained by dividing a total cross-sectional area (X) of the plurality of hollow fiber membranes by a total cross-sectional area (Y1) of the least one inlet is 4.0 or less.Type: ApplicationFiled: September 25, 2017Publication date: January 23, 2020Applicant: Toray Industries, Inc.Inventors: Kenichi Harimoto, Hirokazu Sakaguchi, Kota Hatta, Kazuhiro Tanahashi
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Publication number: 20200022799Abstract: A tubular structure has succeeded in achieving excellent puncture resistance as well as maintenance of flexibility in a base by covering the base with a cover having excellent flexibility. The tubular structure includes a tubular base and a cover which covers the base, wherein the cover includes a copolymer containing a silicone monomer and a polymerizable monomer having a fluoroalkyl group(s) as monomer units.Type: ApplicationFiled: March 30, 2018Publication date: January 23, 2020Inventors: Kyohei Yamashita, Koji Kadowaki, Kazuhiro Tanahashi, Nobuaki Tanaka, Satoshi Yamada, Hiroshi Tsuchikura
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Publication number: 20190216971Abstract: A material for adhesion prevention can be adhered to biological tissue with certainty and has improved tissue adhesiveness and biodegradability. Such material for adhesion prevention is composed of: a 1- to 1,000-?m-thick water-soluble support layer comprising a water-soluble polymer; and a 1- to 1,000-?m-thick adhesion prevention layer comprising a biodegradable polymer. The biodegradable polymer has a structure in which a branched polyalkylene glycol comprising 3 to 8 terminal hydroxyl groups per molecule is bound to a polyhydroxy alkanoic acid, and a mass ratio of the branched polyalkylene glycol relative to the total mass is 1% to 30%.Type: ApplicationFiled: September 29, 2017Publication date: July 18, 2019Inventors: Akihiro Saito, Megumi Nakanishi, Kazuhiro Tanahashi, Toru Arakane, Motonori Hochi, Ai Suzuki, Koji Okabayashi, Shinji Takeoka, Toshinori Fujie, Yuya Ishizuka, Shinya Ohtsubo