The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2025
Filed:
May. 26, 2021
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Tomohiro Kanazawa, Osaka, JP;
Naoki Kohyama, Osaka, JP;
Kenshi Tsuji, Osaka, JP;
Yoshihiro Iguchi, Osaka, JP;
Yui Nakai, Osaka, JP;
Tetsuya Nakaaze, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 27/04 (2006.01); C22C 1/04 (2023.01); C22F 1/18 (2006.01); B28D 5/04 (2006.01); B41F 15/34 (2006.01); C25F 3/26 (2006.01);
U.S. Cl.
CPC ...
C22C 27/04 (2013.01); C22C 1/045 (2013.01); C22F 1/18 (2013.01); B28D 5/045 (2013.01); B41F 15/34 (2013.01); C25F 3/26 (2013.01);
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.