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:
Apr. 04, 2023
Filed:
Dec. 17, 2020
Seiko Watch Kabushiki Kaisha, Tokyo, JP;
Jun Tsuneyoshi, Chiba, JP;
Yasunori Hara, Chiba, JP;
Seiko Watch Kabushiki Kaisha, Tokyo, JP;
Abstract
A personal ornament has excellent corrosion resistance, in which predetermined chemical components are included, the remainder includes Fe and impurities, a structure contains austenite at 95% or more in area %, when a diameter of a circle having a smallest area capable of including one intermetallic compound inside is defined as a size of the intermetallic compound, the number of intermetallic compounds in which the size of the intermetallic compound is 150 μm or more is 0, and the number of intermetallic compounds in which the size is 13 μm or more and less than 150 μm is 3 or less, an average equivalent circle diameter of the austenite is 150 μm or less, and a PRE defined by the following formula (1) is 40 or more.PRE=[Cr]+3.3[Mo]+16[N]  (1)