Patents by Inventor Masaki Fujita
Masaki Fujita 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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Publication number: 20170002484Abstract: A multi-layer tubular woven construct includes two or more layers including an innermost layer and layer A that is a layer other than the innermost layer, layer A including a monofilament yarn serving as a weft yarn, the weft yarn extending spirally and circumferentially around the tubular woven construct to form the weft, the weft including threads lying adjacent to each other, the adjacent weft threads of the monofilament yarn having intervals larger than the diameter of the monofilament yarn.Type: ApplicationFiled: November 27, 2014Publication date: January 5, 2017Inventors: Hiroshi Tsuchikura, Satoshi Yamada, Masaki Fujita, Atsushi Kuwabara
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Publication number: 20160354194Abstract: An artificial blood vessel is composed of a cylindrical multiple-woven fabric structure allowing only a small amount of blood leakage and can achieve both antithrombogenicity and cellular affinity. The artificial blood vessel includes a cylindrical fabric structure in which a cylindrical fabric whose inside contacts blood is arranged, wherein the cylindrical fabric is a fabric prepared by interlacing a plurality of warp yarns and a plurality of weft yarns with each other into a cylindrical shape; the warp yarns and the weft yarns constituting the cylindrical fabric include a multifilament yarn having a single yarn fineness of not more than 0.50 dtex, and are bound to an antithrombogenic material; the antithrombogenic material forms an antithrombogenic material layer having a thickness of 1 to 600 nm inside the cylindrical fabric; and the water permeability under conditions where a pressure of 16 kPa is applied to the inner surface is less than 300 mL/cm2/min.Type: ApplicationFiled: February 12, 2015Publication date: December 8, 2016Inventors: Masaki Fujita, Koji Kadowaki, Yuka Sakaguchi, Kazuhiro Tanahashi, Hiroshi Tsuchikura, Satoshi Yamada
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Patent number: 9504768Abstract: A biodegradable material has an improved biodegradability, an enhanced shape recovery rate after deformation of the material and an improved flexibility. The biodegradable material is a chemically cross-linked product of: a multivalent compound A having 3 or more functional groups X such as hydroxyl group; a multivalent compound B having 3 or more functional groups Y such as carboxyl group; and a compound C having a structure originated from a hydroxycarboxylic acid whose homopolymer formed by homopolymerization has a glass transition point of ?40° C. or lower.Type: GrantFiled: March 28, 2013Date of Patent: November 29, 2016Assignee: Toray Industries, Inc.Inventors: Masaki Fujita, Megumi Nakanishi, Kazuhiro Tanahashi
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Publication number: 20160317272Abstract: A textile vascular prosthesis has reduced leakage of blood through the voids between the fibers. The vascular prosthesis with multi-layer tubular woven structure includes two types of yarns, the yarns being a microfiber multifilament yarn with a monofilament fineness of 0.5 dtex or less as a warp yarn that mainly forms an inner layer to be in contact with a blood flow and a multifilament yarn with a monofilament fineness of 1.0 dtex or more as a warp yarn that mainly forms an outer layer, the inner layer having an apparent cover factor of 2000 or more.Type: ApplicationFiled: December 16, 2014Publication date: November 3, 2016Applicant: Toray Industries, Inc.Inventors: Hiroshi Tsuchikura, Satoshi Yamada, Atsushi Kuwabara, Akihiro Tokuda, Kazuhiro Tanahashi, Masaki Fujita, Koji Kadowaki
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Publication number: 20160296679Abstract: An antithrombogenic material includes a coating material containing: 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; and a base material whose surface is coated with the coating material; wherein the polymer is covalently bound to the base material; and an abundance ratio of nitrogen atoms to an abundance of total atoms as measured by X-ray photoelectron spectroscopy (XPS) on a surface of the base material is 6.0 to 12.0 atomic percent.Type: ApplicationFiled: November 27, 2014Publication date: October 13, 2016Inventors: Koji KADOWAKI, Masaki FUJITA, Yuka SAKAGUCHI, Kazuhiro TANAHASHI
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Patent number: 9408948Abstract: Biodegradable particles for medical use and a vascular embolization material have improved flexibility, cause less aggregation among particles, and have improved particle shape-recovering ability after passing through a catheter or the like. The biodegradable particles for medical use are composed of an A1-B-A2 type triblock copolymer, wherein A1 and A2 are each a block of biodegradable copolymer constituted of monomers including glycolic acid, lactic acid and 6-hydroxycaproic acid, and B is a block of water-soluble polymer.Type: GrantFiled: December 19, 2011Date of Patent: August 9, 2016Assignee: Toray Industries, Inc.Inventors: Yasufumi Yamamura, Kazuhiro Tanahashi, Megumi Nakanishi, Masaki Fujita
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Patent number: 9393340Abstract: A biodegradable material is a chemically cross-linked product between a multivalent compound A having 3 or more functional groups X such as hydroxyl group; and a multivalent compound B having 3 or more functional groups Y such as carboxyl group wherein chemical cross-linkage(s) is/are formed by condensation reaction of the functional group(s) X and the functional group(s) Y; wherein (y+z)/(x+z) is 1.2 to 4.0 when MA>MB, and (x+z)/(y+z) is 1.2 to 4.0 when MA<MB; wherein x represents the number of the functional group(s) X not condensed with the functional group(s) Y; y represents the number of the functional group(s) Y not condensed with the functional group(s) X; z represents the number of the cross-linkage(s); MA represents weight average molecular weight of the multivalent compound A; and MB represents weight average molecular weight of the multivalent compound B.Type: GrantFiled: March 28, 2013Date of Patent: July 19, 2016Assignee: Toray Industries, Inc.Inventors: Masaki Fujita, Megumi Nakanishi, Kazuhiro Tanahashi
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Patent number: 9353217Abstract: Spherical biodegradable particles have improved flexibility, cause less aggregation among particles, and have improved particle shape-recovering ability after passing through a catheter or the like. The biodegradable particles include a synthetic polymer chemically cross-linked to a polyvalent carboxylic acid, the biodegradable particles having a water content of 20 to 90% in a water-saturated state.Type: GrantFiled: December 9, 2011Date of Patent: May 31, 2016Assignee: Toray Industries, Inc.Inventors: Kazuhiro Tanahashi, Megumi Nakanishi, Yasufumi Yamamura, Masaki Fujita
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Patent number: 9345062Abstract: A relay device arranged between a plurality of terminal devices and a file device for relaying data communication, includes: a storage unit configured to store a change history of each piece of data acquired from the file device by a request from the terminal device; a communication unit; and a computation processing unit configured to, in a case where a change history of first data acquired from the file device by a request from a first terminal device is different from a change history of second data having the same file name as the first data acquired from the file device after acquisition of the first data by the first terminal device by a request from a second terminal device, control and cause the communication unit to notify the first terminal device that the first data is changed to the second data.Type: GrantFiled: March 28, 2013Date of Patent: May 17, 2016Assignee: FUJITSU LIMITEDInventor: Masaki Fujita
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Publication number: 20160067065Abstract: An artificial blood vessel is a tubular fabric including a fiber layer containing an ultrafine fiber(s) and an ultrafine fiber layer in the inside of the fiber layer, the ultrafine fiber layer being composed of an ultrafine fiber(s) having a fiber diameter(s) of not less than 10 nm and not more than 3 ?m, wherein a quaternary ammonium group-containing polymer having alkyl groups each of a carbon number 10 or less is covalently bound to the ultrafine fiber(s); heparin is ionically bound to the quaternary ammonium group-containing polymer; and the residual heparin activity after washing with physiological saline at 37° C. for 30 minutes is 20 mIU/cm2 or more.Type: ApplicationFiled: April 10, 2014Publication date: March 10, 2016Inventors: Kazuhiro Tanahashi, Yuka Sakaguchi, Masaki Fujita, Koji Kadowaki, Hiroshi Tsuchikura, Satoshi Yamada
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Publication number: 20160067066Abstract: An artificial blood vessel promotes intimal formation after indwelling, and is capable of maintaining antithrombogenicity during the intimal formation and maintaining its patency for a long time. The artificial blood vessel is a tubular fabric including a fiber layer containing an ultrafine fiber(s) and an ultrafine fiber layer in the inside of the fiber layer, the ultrafine fiber layer being composed of an ultrafine fiber(s) having a fiber diameter(s) of 10 nm to 3 ?m, wherein an antithrombin agent having a polymer chain other than heparin is covalently bound to the ultrafine fiber via the polymer chain, and the thrombin activity inhibition rate on the fiber surface at 37° C. is not less than 60%.Type: ApplicationFiled: April 10, 2014Publication date: March 10, 2016Inventors: Kazuhiro Tanahashi, Yuka Sakaguchi, Masaki Fujita, Koji Kadowaki, Hiroshi Tsuchikura, Satoshi Yamada
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Publication number: 20160058588Abstract: An artificial blood vessel includes a tubular woven fabric composed of a multifilament yarn A including a first polyester and a multifilament yarn B including a second polyester, and has an inner diameter of 8 mm or less and a layer thickness of 50 ?m or more and 250 ?m or less, wherein the multifilament yarn A has a single fiber fineness of 1.0 dtex or more and a total fineness of 33 dtex or less, the multifilament yarn B has a single fiber fineness of 0.08 dtex or less and a total fineness of 66 dtex or less, and the multifilament yarn B forms loops on an inner wall surface of the tubular woven fabric.Type: ApplicationFiled: April 23, 2014Publication date: March 3, 2016Inventors: Satoshi Yamada, Hiroshi Tsuchikura, Nobuaki Tanaka, Kazuhiro Tanahashi, Yuka Sakaguchi, Masaki Fujita, Koji Kadowaki
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Publication number: 20150120868Abstract: An information processing method performed by a computer coupled to a plurality of terminal devices, the information processing method includes setting a first number representing the number of terminal devices belonging to a first subnet capable of simultaneously performing download processing of certain content, and a second number representing the number of terminal devices belonging to a second subnet capable of simultaneously performing the download processing; receiving a download request from the first terminal device; downloading target content indicated in the download request to the first terminal device, when the number of terminal devices belonging to the first subnet that are performing download processing of the target content is less than the first number; measuring a time used for downloading of the target content to the first terminal device; and updating the first number and the second number, based on a comparison of the time and a predetermined time.Type: ApplicationFiled: October 21, 2014Publication date: April 30, 2015Applicant: FUJITSU LIMITEDInventors: Masaki FUJITA, Toyoaki NAKAMOTO
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Publication number: 20150051355Abstract: A biodegradable material has an improved biodegradability, an enhanced shape recovery rate after deformation of the material and an improved flexibility. The biodegradable material is a chemically cross-linked product of: a multivalent compound A having 3 or more functional groups X such as hydroxyl group; a multivalent compound B having 3 or more functional groups Y such as carboxyl group; and a compound C having a structure originated from a hydroxycarboxylic acid whose homopolymer formed by homopolymerization has a glass transition point of ?40° C. or lower.Type: ApplicationFiled: March 28, 2013Publication date: February 19, 2015Inventors: Masaki Fujita, Megumi Nakanishi, Kazuhiro Tanahashi
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Publication number: 20150045518Abstract: A biodegradable material is a chemically cross-linked product between a multivalent compound A having 3 or more functional groups X such as hydroxyl group; and a multivalent compound B having 3 or more functional groups Y such as carboxyl group wherein chemical cross-linkage(s) is/are formed by condensation reaction of the functional group(s) X and the functional group(s) Y; wherein (y+z)/(x+z) is 1.2 to 4.0 when MA>MB, and (x+z)/(y+z) is 1.2 to 4.0 when MA<MB; wherein x represents the number of the functional group(s) X not condensed with the functional group(s) Y; y represents the number of the functional group(s) Y not condensed with the functional group(s) X; z represents the number of the cross-linkage(s); MA represents weight average molecular weight of the multivalent compound A; and MB represents weight average molecular weight of the multivalent compound B.Type: ApplicationFiled: March 28, 2013Publication date: February 12, 2015Inventors: Masaki Fujita, Megumi Nakanishi, Kazuhiro Tanahashi
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Patent number: 8871873Abstract: A biodegradable particle including a block copolymer produced by copolymerization of a biodegradable copolymer having a structure composed of hydroxycarboxylic acid a1, whose homopolymer produced by homopolymerization has a glass transition point of not less than 40° C., and hydroxycarboxylic acid a2, whose homopolymer produced by homopolymerization has a glass transition point of not more than ?40° C.; a water-soluble polymer comprising a functional group selected from the group consisting of a hydroxyl group, amino group and carboxylic acid group at each of both ends; and a polyvalent compound comprising 2 or more functional groups each selected from the group consisting of a hydroxyl group, amino group and carboxylic acid group; wherein a ratio of mass of said structure composed of hydroxycarboxylic acid a2 to mass of said biodegradable copolymer is 30 to 90% by mass.Type: GrantFiled: March 29, 2012Date of Patent: October 28, 2014Assignee: Toray Industries, Inc.Inventors: Masaki Fujita, Megumi Nakanishi, Yoshitake Takahashi, Yasufumi Yamamura, Kazuhiro Tanahashi
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Publication number: 20140061121Abstract: A separation membrane includes a membrane comprising a polymer, characterized in that a functional layer is formed on the surface in one side of the membrane, the peak area percentage of carbon derived from ester group measured by the electron spectroscopy for chemical analysis (ESCA) on the surface of the preceding functional layer is 0.1% (by atomic number) or more but not more than 10 (% by atomic number), and the peak area percentage of carbon derived from ester group measured by the electron spectroscopy for chemical analysis (ESCA) on the surface opposite to the functional layer is not more than 10 (% by atomic number). A separation membrane module suffering from little sticking of organic matters, proteins, platelets and so on is provided with the separation membrane as a built-in membrane.Type: ApplicationFiled: November 12, 2013Publication date: March 6, 2014Applicant: Toray Industries, Inc.Inventors: YOSHIYUKI UENO, Masaki Fujita, Hiroyuki Sugaya
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Publication number: 20140018505Abstract: A biodegradable particle including a block copolymer produced by copolymerization of a biodegradable copolymer having a structure composed of hydroxycarboxylic acid a1, whose homopolymer produced by homopolymerization has a glass transition point of not less than 40° C. and hydroxycarboxylic acid a2, whose homopolymer produced by homopolymerization has a glass transition point of not more than ?40° C.; a water-soluble polymer comprising a functional group selected from the group consisting of a hydroxyl group, amino group and carboxylic acid group at each of both ends; and a polyvalent compound comprising 2 or more functional groups each selected from the group consisting of a hydroxyl group, amino group and carboxylic acid group; wherein a ratio of mass of said structure composed of hydroxycarboxylic acid a2 to mass of said biodegradable copolymer is 30 to 90% by mass.Type: ApplicationFiled: March 29, 2012Publication date: January 16, 2014Applicant: Toray Industries, Inc.Inventors: Masaki Fujita, Megumi Nakanishi, Yoshitake Takahashi, Yasufumi Yamamura, Kazuhiro Tanahashi
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Patent number: 8613361Abstract: A separation membrane includes a membrane comprising a polymer, characterized in that a functional layer is formed on the surface in one side of the membrane, the peak area percentage of carbon derived from ester group measured by the electron spectroscopy for chemical analysis (ESCA) on the surface of the preceding functional layer is 0.1% (by atomic number) or more but not more than 10 (% by atomic number), and the peak area percentage of carbon derived from ester group measured by the electron spectroscopy for chemical analysis (ESCA) on the surface opposite to the functional layer is not more than 10 (% by atomic number). A separation membrane module suffering from little sticking of organic matters, proteins, platelets and so on is provided with the separation membrane as a built-in membrane.Type: GrantFiled: March 30, 2009Date of Patent: December 24, 2013Assignee: Toray Industries, Inc.Inventors: Yoshiyuki Ueno, Masaki Fujita, Hiroyuki Sugaya
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Publication number: 20130306544Abstract: The present invention provides a medical material and a blood purification apparatus each having high anti-thrombotic properties and high safety. The apparatus is produced by incorporating therein a medical material which has a hydrophilic copolymerization polymer present on a surface thereof which is to be in contact with blood, wherein particulate protuberances each having a particle diameter of 50 nm or more are present on the surface which is to be in contact with blood at a density of 3 particles/?m2 or less and the relaxation time of adsorbed water in the hydrophilic copolymerization polymer is 2.5×10?8 seconds or shorter and 5.0×10?10 seconds or longer at ?40° C.Type: ApplicationFiled: December 27, 2011Publication date: November 21, 2013Applicant: Toray Industries, Inc.Inventors: Yoshiyuki Ueno, Masaki Fujita, Hiroyuki Sugaya, Kazuyuki Hashimoto, Hiroyuki Terasaka, Ryo Koganemaru