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:
May. 09, 2023
Filed:
Sep. 04, 2020
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Koki Takasawa, Suwa, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G04B 37/22 (2006.01); C22C 38/42 (2006.01); C22C 38/48 (2006.01); C22C 38/44 (2006.01); C22C 38/04 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01);
U.S. Cl.
CPC ...
G04B 37/22 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/48 (2013.01); C21D 2211/001 (2013.01); C21D 2211/005 (2013.01);
Abstract
A watch component includes an austenized ferritic stainless steel including a base including a ferrite phase, a surface layer formed on a surface of the base, the surface layer including an austenized phase, and a mixed layer formed between the base and the surface layer, the mixed layer being a layer in which the ferrite phase and the austenized phase are mixed. In a cross section taken along a depth direction from the surface, a thickness of the mixed layer is 45% or less of a thickness of the surface layer.