Patents by Inventor Tatsuyuki Nakatani
Tatsuyuki Nakatani 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: 11969334Abstract: An artificial blood vessel 10 comprises: an artificial blood vessel body 12; and a carbon material film 11 that covers the inner wall of the artificial blood vessel body 12. The inner wall which is covered by the carbon material film 11 is configured so that the water vapor adsorption isotherm shows desorption hysteresis.Type: GrantFiled: September 5, 2019Date of Patent: April 30, 2024Assignee: KAKE EDUCATIONAL INSTITUTIONInventors: Yasuhiro Fujii, Susumu Ozawa, Tatsuyuki Nakatani, Yuichi Imai
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Patent number: 11401604Abstract: A film formation method is provided with a step for disposing a non-electroconductive long thin tube 102 in a chamber 101 in which the internal pressure thereof is adjustable, generating a plasma inside the long thin tube 102 in a state in which a starting material gas including a hydrocarbon is supplied, and forming a diamond-like carbon film on an inner wall surface of the long thin tube 102. The long thin tube 102 is disposed in the chamber 101 in a state in which a discharge electrode 125 is disposed in one end part of the long thin tube 102 and the other end part is open. An alternating-current bias is intermittently applied between the discharge electrode 125 and a counter electrode 126 provided so as to be separated from the long thin tube 102.Type: GrantFiled: March 6, 2018Date of Patent: August 2, 2022Assignee: NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITYInventors: Yuichi Imai, Tatsuyuki Nakatani, Susumu Ozawa, Yasuhiro Fujii, Haruhito Uchida
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Publication number: 20210353404Abstract: An artificial blood vessel 10 comprises: an artificial blood vessel body 12; and a carbon material film 11 that covers the inner wall of the artificial blood vessel body 12. The inner wall which is covered by the carbon material film 11 is configured so that the water vapor adsorption isotherm shows desorption hysteresis.Type: ApplicationFiled: September 5, 2019Publication date: November 18, 2021Inventors: Yasuhiro FUJII, Susumu Ozawa, Tatsuyuki NAKATANI, Yuichi IMAI
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Publication number: 20200002809Abstract: A film formation method is provided with a step for disposing a non-electroconductive long thin tube 102 in a chamber 101 in which the internal pressure thereof is adjustable, generating a plasma inside the long thin tube 102 in a state in which a starting material gas including a hydrocarbon is supplied, and forming a diamond-like carbon film on an inner wall surface of the long thin tube 102. The long thin tube 102 is disposed in the chamber 101 in a state in which a discharge electrode 125 is disposed in one end part of the long thin tube 102 and the other end part is open. An alternating-current bias is intermittently applied between the discharge electrode 125 and a counter electrode 126 provided so as to be separated from the long thin tube 102.Type: ApplicationFiled: March 6, 2018Publication date: January 2, 2020Inventors: Yuichi IMAI, Tatsuyuki NAKATANI, Susumu OZAWA, Yasuhiro FUJII, Haruhito UCHIDA
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Patent number: 9163149Abstract: An implant material includes: a base material 10; and a carbonaceous film 20 provided on a surface of the base material 10. The carbonaceous film 20 includes carbon atoms, oxygen atoms, and nitrogen atoms in a surface thereof, and the carbon atoms are bonded to the oxygen atoms to form carboxyl carbon and carbon having a single bond with oxygen. In the surface of the carbonaceous film 20, a content of nitrogen atoms is greater than or equal to 8.0 at. %, a content of carbon having a single bond with oxygen is greater than or equal to 5.4%, and a content of carboxyl carbon is less than or equal to 3.1%.Type: GrantFiled: June 30, 2011Date of Patent: October 20, 2015Assignee: TOYO ADVANCED TECHNOLOGIES CO., LTD.Inventors: Akira Mochizuki, Yuki Nitta, Keishi Okamoto, Tatsuyuki Nakatani
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Patent number: 9138507Abstract: A method for manufacturing an implant material includes preparing a base material for implant, removing moisture from a chamber in which the base material is placed, and introducing material gas as a carbon source and a silicon source into the chamber after the removal of the moisture to form a carbon thin film containing a C—C component in which carbon atoms are bonded, and a SiC component in which carbon and silicon atoms are bonded on a surface of the base material by ionized deposition.Type: GrantFiled: November 11, 2014Date of Patent: September 22, 2015Assignee: TOYO ADVANCED TECHNOLOGIES CO., LTD.Inventors: Hiroki Nikawa, Seichiyou Makihira, Yuichi Mine, Yoshinori Abe, Tatsuyuki Nakatani, Keishi Okamoto, Yuki Nitta
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Publication number: 20150064339Abstract: A method for manufacturing an implant material includes preparing a base material for implant, removing moisture from a chamber in which the base material is placed, and introducing material gas as a carbon source and a silicon source into the chamber after the removal of the moisture to form a carbon thin film containing a C—C component in which carbon atoms are bonded, and a SiC component in which carbon and silicon atoms are bonded on a surface of the base material by ionized deposition.Type: ApplicationFiled: November 11, 2014Publication date: March 5, 2015Inventors: Hiroki Nikawa, Seichiyou Makihira, Yuichi Mine, Yoshinori Abe, Tatsuyuki Nakatani, Keishi Okamoto, Yuki Nitta
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Patent number: 8501106Abstract: A plasma generation system and related method for generating plasma in a cavity of a narrow tube, the system including: a first electrode including a conductive member covered with an insulator or dielectric, the first electrode being inserted into the cavity of the narrow tube to generate the plasma; a power supply to apply an alternating voltage or pulse voltage to the first electrode; and a second electrode located outside the narrow tube and connected to the power supply, the power supply applying the alternating voltage or pulse voltage between the first electrode and the second electrode, wherein the conductive member is made of a wire, a portion of the narrow tube is provided between the first electrode and the second electrode, and the second electrode is arranged and shaped so that a discharge is unevenly performed in a circumferential direction of the first electrode.Type: GrantFiled: April 2, 2012Date of Patent: August 6, 2013Assignee: Toyo Advanced Technologies Co., Ltd.Inventors: Takehiko Sato, Tatsuyuki Nakatani, Tatsuo Kimura
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Patent number: 8435287Abstract: A stent includes a tubular stent body 11, a diamond-like carbon film 12 formed on the surface of the stent body 11 and having an activated surface, and a polymer layer 13 immobilized on the surface of the diamond-like carbon film. The polymer layer 13 contains a drug 14 having an effect to prevent restenosis, and the drug 14 is gradually released from the polymer layer 13.Type: GrantFiled: January 15, 2007Date of Patent: May 7, 2013Assignees: Toyo Advanced Technologies Co., Ltd., Japan Stent Technology Co., LtdInventors: Tatsuyuki Nakatani, Keishi Okamoto, Shuzo Yamashita, Ikuo Komura, Koji Mori
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Publication number: 20130108879Abstract: An implant material includes: a base material 10; and a carbonaceous film 20 provided on a surface of the base material 10. The carbonaceous film 20 includes carbon atoms, oxygen atoms, and nitrogen atoms in a surface thereof, and the carbon atoms are bonded to the oxygen atoms to form carboxyl carbon and carbon having a single bond with oxygen. In the surface of the carbonaceous film 20, a content of nitrogen atoms is greater than or equal to 8.0 at. %, a content of carbon having a single bond with oxygen is greater than or equal to 5.4%, and a content of carboxyl carbon is less than or equal to 3.1%.Type: ApplicationFiled: June 30, 2011Publication date: May 2, 2013Applicant: Toyo Advance Technologies Co., Ltd.Inventors: Akira Mochizuki, Yuki Nitta, Keishi Okamoto, Tatsuyuki Nakatani
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Patent number: 8430591Abstract: A ballpoint pen tip includes a ball and a ball holder for rotatably holding the ball. The ball includes a ball body and a first carbonaceous film formed so as to cover a surface of the ball body. The first carbonaceous film has carbon atoms and oxygen atoms bonded to some of the carbon atoms. The ratio of carbon atoms bonded to oxygen atoms to the total carbon atoms at a surface of the first carbonaceous film is equal to or greater than 0.1.Type: GrantFiled: February 22, 2012Date of Patent: April 30, 2013Assignee: Kabushiki Kaisha Pilot CorporationInventors: Keishi Okamoto, Satoru Ando, Tatsuyuki Nakatani, Yuki Nitta, Kunihiro Toyota, Kouichi Takayama, Takumi Kajiwara, Hirotaka Masuda
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Publication number: 20120187086Abstract: A plasma generation system and related method for generating plasma in a cavity of a narrow tube, the system including: a first electrode including a conductive member covered with an insulator or dielectric, the first electrode being inserted into the cavity of the narrow tube to generate the plasma; a power supply to apply an alternating voltage or pulse voltage to the first electrode; and a second electrode located outside the narrow tube and connected to the power supply, the power supply applying the alternating voltage or pulse voltage between the first electrode and the second electrode, wherein the conductive member is made of a wire, a portion of the narrow tube is provided between the first electrode and the second electrode, and the second electrode is arranged and shaped so that a discharge is unevenly performed in a circumferential direction of the first electrode.Type: ApplicationFiled: April 2, 2012Publication date: July 26, 2012Applicant: TOYO ADVANCED TECHNOLOGIES CO., LTD.Inventors: Takehiko SATO, Tatsuyuki Nakatani, Tatsuo Kimura
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Patent number: 8221823Abstract: A diamond-like carbon film (DLC film) is formed on the surface of a base material made of an inorganic material, such as ceramics, or the like, or an organic material, such as resin, or the like. The surface of the resultant DLC film is treated with plasma, or the like, so as to be activated. Various monomers having biocompatibility, etc., are graft-polymerized to the activated surface of the DLC film, whereby a polymer layer is formed from the monomers grafted to the surface of the DLC film. Thus, the base material coated with the DLC film modified with a polymer which does not readily separate can be realized.Type: GrantFiled: February 1, 2010Date of Patent: July 17, 2012Assignee: Toyo Advanced Technologies Co., Ltd.Inventors: Yoshinori Abe, Tatsuyuki Nakatani, Keishi Okamoto, Kohei Shiraishi, Kazuo Sugiyama
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Patent number: 8168130Abstract: A method and system for surely and conveniently generating plasma in a narrow tube having a small diameter. A first electrode formed by a conductive member covered with an insulator or dielectric is inserted into a narrow tube. The narrow tube is located on a second electrode. A power supply applies an alternating voltage or pulse voltage between the first electrode and the second electrode so that plasma is generated in the narrow tube around the first electrode.Type: GrantFiled: August 11, 2006Date of Patent: May 1, 2012Assignee: Toyo Advanced Technologies Co., Ltd.Inventors: Takehiko Sato, Tatsuyuki Nakatani, Tatsuo Kimura
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Publication number: 20110318714Abstract: An implant material includes a base material, and a silicon-containing carbon thin film formed on a surface of the base material. The carbon thin film contains a C—C component in which carbon atoms are bonded, and a SiC component in which carbon and silicon atoms are bonded, and a ratio of the SiC component is 0.06 or higher.Type: ApplicationFiled: February 10, 2009Publication date: December 29, 2011Applicant: TOYO ADVANCED TECHNOLOGIES CO., LTD.Inventors: Hiroki Nikawa, Seichiyou Makihira, Yuichi Mine, Yoshinori Abe, Tatsuyuki Nakatani, Keishi Okamoto, Yuki Nitta
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Patent number: 7931934Abstract: A medical device includes a medial device body, and a diamond-like thin film covering the medical device body and containing silicon. The diamond-like thin film has a concentration of silicon which is lower in a surface thereof than in an interface thereof with the medical device body mentioned above, and continuously varies.Type: GrantFiled: January 15, 2007Date of Patent: April 26, 2011Assignees: Toyo Advanced Technologies Co., Ltd., Japan Stent Technology Co., Ltd.Inventors: Tatsuyuki Nakatani, Keishi Okamoto, Shuzo Yamashita, Koji Mori, Ikuo Komura
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Publication number: 20110060403Abstract: A stent includes a tubular stent body 11, a diamond-like carbon film 12 formed on the surface of the stent body 11 and having an activated surface, and a polymer layer 13 immobilized on the surface of the diamond-like carbon film. The polymer layer 13 contains a drug 14 having an effect to prevent restenosis, and the drug 14 is gradually released from the polymer layer 13.Type: ApplicationFiled: January 15, 2007Publication date: March 10, 2011Inventors: Tatsuyuki Nakatani, Keishi Okamoto, Shuzo Yamashita, Ikuo Komura, Koji Mori
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Publication number: 20100247917Abstract: A targeted carbon thin film is a carbon thin film formed on a surface of a base material. The film includes a carbon framework of carbon atoms bonded together, and an amino group bonded to the carbon atoms forming the carbon framework.Type: ApplicationFiled: November 5, 2008Publication date: September 30, 2010Inventors: Yuki Nitta, Tatsuyuki Nakatani, Keishi Okamoto
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Publication number: 20100136212Abstract: A diamond-like carbon film (DLC film) is formed on the surface of a base material made of an inorganic material, such as ceramics, or the like, or an organic material, such as resin, or the like. The surface of the resultant DLC film is treated with plasma, or the like, so as to be activated. Various monomers having biocompatibility, etc., are graft-polymerized to the activated surface of the DLC film, whereby a polymer layer is formed from the monomers grafted to the surface of the DLC film. Thus, the base material coated with the DLC film modified with a polymer which does not readily separate can be realized.Type: ApplicationFiled: February 1, 2010Publication date: June 3, 2010Inventors: Yoshinori Abe, Tatsuyuki Nakatani, Keishi Okamoto, Kohei Shiraishi, Kazuo Sugiyama
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Publication number: 20090317294Abstract: A method of low temperature sterilization that with the use of a compact simple apparatus, is capable of safe, unfailing sterilization. There is provided an apparatus comprising gas cylinder (gas supply source)(8), high energy particle generation part (1-3) capable of generating a gas of temperature nonequilibrium condition containing high energy particles through exciting of the gas supplied from the gas cylinder (8) and gas blow part (4) capable of jetting the gas of temperature nonequilibrium condition generated by the high energy particle generation part (1-3) over pathogenic microbes positioned outside.Type: ApplicationFiled: August 25, 2005Publication date: December 24, 2009Inventors: Takehiko Sato, Shuitsu Fujii, Takuya Urayama, Akinori Shida, Raju Ramasamy, Kazunari Fujioka, Tatsuyuki Nakatani