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公开(公告)号：US11268168B2
公开(公告)日：2022-03-08
申请号：US16641146
申请日：2018-08-09
发明人： Hideki Hosoda , Akira Umise , Kenji Goto
摘要： The present invention provides an artifactless superelastic alloy including a Au—Cu—Al alloy, the superelastic alloy containing Cu in an amount of 20 atom % or more and 40 atom % or less, Al in an amount of 15 atom % or more and 25 atom % or less, and Au as a balance, the superelastic alloy having a bulk magnetic susceptibility of −24 ppm or more and 6 ppm or less. The Ni-free superelastic alloy of the present invention is capable of exhibiting superelasticity in a normal temperature range, and hardly generated artifacts in a magnetic field environment. The alloy can be produced by setting a casting time in a melting and casting step to a fixed time, and hot-pressing an alloy after casting to make material structures homogeneous.
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公开(公告)号：US12104236B2
公开(公告)日：2024-10-01
申请号：US16968764
申请日：2019-02-28
发明人： Hideki Hosoda , Akira Umise , Kenji Goto
IPC分类号： C22F1/00 , A61L27/04 , A61L27/50 , A61L29/02 , A61L29/14 , A61L31/02 , A61L31/14 , C22C5/02 , C22F1/14
CPC分类号： C22F1/006 , A61L27/047 , A61L27/50 , A61L29/02 , A61L29/14 , A61L31/022 , A61L31/14 , C22C5/02 , C22F1/14 , A61L2400/16 , A61L2430/12
摘要： The present invention provides a shape-memory alloy including a Au—Cu—Al alloy having 20 at % or more and 40 at % or less Cu and 15 at % or more and 30 at % or less Al, with the balance being Au and inevitable impurities. The shape-memory alloy has a Vickers hardness of 360 Hv or less. The Au—Cu—Al alloy of the present invention is an alloy capable of developing both biocompatibility and a shape-memory effect, and further capable of achieving artifactlessness in a magnetic environment. The Au—Cu—Al alloy can be produced by heat-treating a clad material formed of a combination of a hollow material made of a Au—Cu alloy and a core material made of metallic Al at 500° C. or more and 700° C. or less.
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公开(公告)号：US10590519B2
公开(公告)日：2020-03-17
申请号：US14913810
申请日：2014-08-29
发明人： Hideki Hosada , Tomonari Inamura , Masaki Tahara , Tomohiko Morita , Akira Umise , Yusuke Doi , Kenji Goto
摘要： The present invention provides a superelastic alloy formed by addition of Fe or Co to an Au—Cu—Al alloy, including: Cu of 12.5% by mass or more and 16.5% by mass or less; Al of 3.0% by mass or more and 5.5% by mass or less; Fe or Co of 0.01% by mass or more and 2.0% by mass or less; and a balance Au, and a difference between Al content and Cu content (Cu—Al) is 12% by mass or less. The superelastic alloy according to the present invention has superelastic property while being Ni-free, excellent X-ray imaging property, processability, and strength property, and is suitable for a medical field.
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公开(公告)号：US11795527B2
公开(公告)日：2023-10-24
申请号：US17295778
申请日：2019-11-18
发明人： Shubham Yadav , Yuya Kato , Kenji Goto , Kunihiro Shima
CPC分类号： C22C19/07 , A61L31/022
摘要： The present invention relates to an alloy for medical use, including Pt, Co, Cr, Ni, and Mo. The alloy includes 10 atom % or more and 30 atom % or less of Pt, 20 atom % or more and 31 atom % or less of Cr, 5 atom % or more and 24 atom % or less of Ni, 4 atom % or more and 8 atom % or less of Mo, the balance Co, and unavoidable impurities, and a ratio of the Ni content (CNi) to the Pt content (CPt), CNi/CPt is 1.5 or less. The present invention can be applied to various kinds of devices for medical use, such as catheter, embolic coils, and guide wires, in addition to stents such as flow-diverter stents.
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公开(公告)号：US10220120B2
公开(公告)日：2019-03-05
申请号：US14898794
申请日：2014-01-30
发明人： Kunihiro Shima , Kenji Goto , Yasushi Masahiro , Asaka Ueno , Hiroo Iwata , Ryusuke Nakai , Tomonobu Kodama
摘要： The present invention is an alloy for medical use including an Au—Pt alloy, containing 34 to 36 mass % of Pt with the balance being Au, and having an α-phase single structure in which a ratio of a peak intensity (X) of a Pt (111) plane to a peak intensity (Y) of an Au (111) plane (X/Y) is 0.01 or less in an X-ray diffraction analysis. The alloy can be produced in such a manner that after the Au—Pt alloy ingot is molten and cast, cold working and a heat treatment for homogenization are performed at least two times on the molten and cast alloy. The alloy of the present invention is an artifact-free material that exhibits excellent compatibility with a magnetic field environment such as an MRI and has magnetic susceptibility of ±4 ppm with respect to that of water.
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公开(公告)号：US09266916B2
公开(公告)日：2016-02-23
申请号：US14655076
申请日：2014-01-20
IPC分类号： C07F15/00
CPC分类号： C07F15/0046 , C01G55/008 , C23C16/16 , C23C16/45553
摘要： The present invention is a method for producing dodecacarbonyl triruthenium (DCR) including a process of carbonylating ruthenium chloride with carbon monoxide, in which an amine is added to a reaction system at 0.8 molar equivalent or more with respect to chlorine of the ruthenium chloride and the carbonylation is conducted at a reaction temperature of 50 to 100° C. and a reaction pressure of 0.2 to 0.9 MPa. According to the present invention, it is possible to produce dodecacarbonyl triruthenium having less residual impurity metals without applying a reaction condition of a high pressure.
摘要翻译： 本发明是一种生产十二羰基三钌（DCR）的方法，其包括使用一氧化碳羰基化氯化钌的方法，其中胺相对于氯化钌的氯为0.8摩尔当量以上而添加到反应体系中， 在50〜100℃的反应温度和0.2〜0.9MPa的反应压力下进行羰基化。 根据本发明，可以在不施加高压反应条件的情况下制造具有较少残留杂质金属的十二羰基三钌。
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公开(公告)号：US11345986B2
公开(公告)日：2022-05-31
申请号：US17077344
申请日：2020-10-22
发明人： Kunihiro Shima , Kenji Goto , Yasushi Masahiro , Asaka Ueno , Hiroo Iwata , Ryusuke Nakai , Tomonobu Kodama
摘要： The present invention provides an alloy for medical use including an Au—Pt alloy, in which the Au—Pt alloy has a Pt concentration of 24 mass % or more and less than 34 mass % with the balance being Au, and has at least a material structure in which a Pt-rich phase having a Pt concentration higher than that of an α-phase is distributed in an α-phase matrix, the Pt-rich phase has a Pt concentration that is 1.2 to 3.8 times the Pt concentration of the α-phase, and the Pt-rich phase has an area ratio of 1 to 22% in any cross-section. This alloy is an artifact-free alloy material that exhibits excellent compatibility with a magnetic field environment such as an MRI and has magnetic susceptibility of ±4 ppm with respect to magnetic susceptibility of water.
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公开(公告)号：US11654215B2
公开(公告)日：2023-05-23
申请号：US16069955
申请日：2017-03-02
发明人： Michimasa Okubo , Kenji Goto
CPC分类号： A61L31/022 , A61B17/12 , A61B17/1214 , A61L31/02 , B21F3/00 , C22C1/02 , C22C5/02 , C22F1/14 , A61B2017/00526 , A61B2017/00836 , A61B2017/00964 , C22F1/00
摘要： The present invention is an embolization coil having an optimum morphological stability. The embolization coil includes a wire material made of an Au—Pt alloy. The wire material constituting the embolization coil has such a composition that a Pt concentration is 24 mass % or more and less than 34 mass %, with the balance being Au. The wire material has such a material structure that a Pt-rich phase of an Au—Pt alloy having a Pt concentration of 1.2 to 3.8 times a Pt concentration of an α phase is distributed in an α phase matrix. The wire material has a bulk susceptibility of −13 ppm or more and −5 ppm or less. In a material structure of a transverse cross-section of the wire material, an average value of two or more average crystal particle diameters measured by a linear intercept method is 0.20 μm or more and 0.35 μm or less.
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公开(公告)号：US11453931B2
公开(公告)日：2022-09-27
申请号：US17607397
申请日：2020-09-24
发明人： Michimasa Okubo , Kenji Goto , Kunihiro Tanaka , Kojiro Shiraishi , Kunihiro Shima , Yuya Kato , Kenichi Hamada , Eiichi Honda , Emi Takegawa
摘要： The present invention relates to a medical Au—Pt—Pd alloy including Au, Pt, Pd, and inevitable impurities. The alloy has an alloy composition inside a polygon (A1-A2-A3-A4-A5-A6) surrounded by straight lines connected at point A1 (Au: 37.9 atom %, Pt: 0.1 atom %, and Pd: 62 atom %), point A2 (Au: 79.9 atom %, Pt: 0.1 atom %, and Pd: 20 atom %), point A3 (Au: 79.9 atom %, Pt: 20 atom %, and Pd: 0.1 atom %), point A4 (Au: 69.9 atom %, Pt: 30 atom %, and Pd: 0.1 atom %), point A5 (Au: 49 atom %, Pt: 30 atom %, and Pd: 21 atom %), and point A6 (Au: 39 atom %, Pt: 40 atom %, and Pd: 21 atom %) in a Au—Pt—Pd ternary state diagram. The metal structure of the alloy is optimized, and the metal structure is close to a single-phase structure, and has little precipitation of a Au-rich phase and a Pt-rich phase different in composition from a mother phase.
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公开(公告)号：US10883162B2
公开(公告)日：2021-01-05
申请号：US15106508
申请日：2014-01-30
发明人： Kunihiro Shima , Kenji Goto , Yasushi Masahiro , Asaka Ueno , Hiroo Iwata , Ryusuke Nakai , Tomonobu Kodama
摘要： The present invention provides an alloy for medical use including an Au—Pt alloy, in which the Au—Pt alloy has a Pt concentration of 24 mass % or more and less than 34 mass % with the balance being Au, and has at least a material structure in which a Pt-rich phase having a Pt concentration higher than that of an α-phase is distributed in an α-phase matrix, the Pt-rich phase has a Pt concentration that is 1.2 to 3.8 times the Pt concentration of the α-phase, and the Pt-rich phase has an area ratio of 1 to 22% in any cross-section. This alloy is an artifact-free alloy material that exhibits excellent compatibility with a magnetic field environment such as an MRI and has magnetic susceptibility of ±4 ppm with respect to magnetic susceptibility of water.
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