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. 15, 2012
Filed:
Sep. 25, 2007
Yukio Miya, Kawagoe, JP;
Koichi Naoi, Kawagoe, JP;
Osamu Tanaka, Kodaira, JP;
Yoshitsugu Shibuya, Toda, JP;
Junji Sato, Kawagoe, JP;
Yukio Miya, Kawagoe, JP;
Koichi Naoi, Kawagoe, JP;
Osamu Tanaka, Kodaira, JP;
Yoshitsugu Shibuya, Toda, JP;
Junji Sato, Kawagoe, JP;
Citizen Holdings Co., Ltd., Tokyo, JP;
Abstract
A decorative part and a process for producing the decorative part. A first nitride layer containing at least one metal selected among hafnium, titanium, and zirconium is formed on the surface of a decorative part comprising a soft base made of a material selected among stainless steel, titanium and titanium alloys, brass, etc., and a second nitride layer containing at least one metal which is selected among hafnium, titanium, and zirconium and is different from that in the first nitride layer is formed on the first nitride layer to thereby form a primer layer. A multilayered hardened layer including a gold alloy layer is further formed as a finish layer on the primer layer.