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公开(公告)号：US20220098708A1
公开(公告)日：2022-03-31
申请号：US17414442
申请日：2019-11-18
Inventor： Tomohiro KANAZAWA , Yoshihiro IGUCHI , Naoki KOHYAMA , Atsushi SHIMADA , Kenshi TSUJI , Yui NAKAI
Abstract: A tungsten wire contains tungsten or a tungsten alloy. An average width of surface crystal grains in a direction perpendicular to an axis of the tungsten wire is at most 76 nm. The tungsten wire has a tensile of at least 4800 MPa, and a diameter of at most 100 μm.
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公开(公告)号：US20240286314A1
公开(公告)日：2024-08-29
申请号：US18572811
申请日：2022-06-30
Inventor： Tomohiro KANAZAWA , Kenshi TSUJI , Yui NAKAI , Tetsuya NAKAAZE
CPC classification number: B28D5/045 , G01N3/32 , B28D5/0082 , G01N2203/0067 , G01N2203/0073
Abstract: A metal wire includes tungsten or a tungsten alloy. When a fatigue test is conducted on the metal wire at a maximum stress of 4400 MPa in accordance with Japanese Industrial Standard (JIS) C6821, a total number of cycles required to break the metal wire is at least 20,000 cycles.
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Patent Agency Ranking
公开(公告)号：US20240131836A1
公开(公告)日：2024-04-25
申请号：US18279061
申请日：2021-12-21
Inventor： Tomohiro KANAZAWA , Kazuhiro DAIJO , Kenshi TSUJI , Naoki KOHYAMA , Yui NAKAI
IPC: B41F15/34 , B41N1/04 , B41N1/24 , C22C27/04 , C22F1/18 , D03D1/00 , D03D9/00 , D03D15/33 , D03D15/67
CPC classification number: B41F15/34 , B41N1/04 , B41N1/247 , C22C27/04 , C22F1/18 , D03D1/00 , D03D9/00 , D03D15/33 , D03D15/67 , D10B2505/00
Abstract: A metal wire includes tungsten or a tungsten alloy. The metal wire has a diameter of at most 13 μm, a tensile strength of at least 4.8 GPa, and a natural hanging length per 1000 mm of at least 800 mm.
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公开(公告)号：US20220220591A1
公开(公告)日：2022-07-14
申请号：US17604859
申请日：2020-04-13
Inventor： Tomohiro KANAZAWA , Naoki KOHYAMA , Yoshihiro IGUCHI , Yui NAKAI
Abstract: A tungsten wire is a tungsten wire containing tungsten or a tungsten alloy, a diameter of the tungsten wire is at most 100 μm, and a total number of torsional rotations to breakage per length of 50 mm of the tungsten wire (10) is greater than or equal to 250×exp(−0.026×D) when a tension that is 50% of a breakage tension of the tungsten wire is applied as a load, D denoting the diameter of the tungsten wire.
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公开(公告)号：US20250146108A1
公开(公告)日：2025-05-08
申请号：US18835442
申请日：2022-12-21
Inventor： Tomohiro KANAZAWA , Akitoshi KASAHARA , Yui NAKAI , Masanobu MATSUSHIMA
IPC: C22C27/04 , D03D15/573 , D03D15/67
Abstract: A tungsten wire includes: a metal wire that contains tungsten as a major component; and an oxide film that covers a surface of the metal wire. An average thickness of the oxide film is at least 4 nm and at most 13 nm. A tensile strength of the tungsten wire is at least 3500 MPa.
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公开(公告)号：US20240227384A9
公开(公告)日：2024-07-11
申请号：US18279061
申请日：2021-12-21
Inventor： Tomohiro KANAZAWA , Kazuhiro DAIJO , Kenshi TSUJI , Naoki KOHYAMA , Yui NAKAI
IPC: B41F15/34 , B41N1/04 , B41N1/24 , C22C27/04 , C22F1/18 , D03D1/00 , D03D9/00 , D03D15/33 , D03D15/67
CPC classification number: B41F15/34 , B41N1/04 , B41N1/247 , C22C27/04 , C22F1/18 , D03D1/00 , D03D9/00 , D03D15/33 , D03D15/67 , D10B2505/00
Abstract: A metal wire includes tungsten or a tungsten alloy. The metal wire has a diameter of at most 13 μm, a tensile strength of at least 4.8 GPa, and a natural hanging length per 1000 mm of at least 800 mm.
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公开(公告)号：US20230227951A1
公开(公告)日：2023-07-20
申请号：US17925071
申请日：2021-05-26
Inventor： Tomohiro KANAZAWA , Naoki KOHYAMA , Kenshi TSUJI , Yoshihiro IGUCHI , Yui NAKAI , Tetsuya NAKAAZE
Abstract: A tungsten wire that contains tungsten or a tungsten alloy is provided. An average width of surface crystal grains in a direction perpendicular to an axis of the tungsten wire is at most 98 nm. The tungsten wire has a tensile strength of at least 3900 MPa. The tungsten wire has a diameter of at least 100 μm and at most 225 μm.
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