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. 31, 2022
Filed:
Sep. 16, 2019
Applicant:
The Swatch Group Research and Development Ltd, Marin, CH;
Inventors:
Assignee:
The Swatch Group Research and Development Ltd, Marin, CH;
Primary Examiner:
Int. Cl.
CPC ...
C23C 16/06 (2006.01); C23C 16/02 (2006.01); C23C 16/40 (2006.01); C23C 16/455 (2006.01); C23C 16/56 (2006.01); G04B 19/12 (2006.01); C22C 5/08 (2006.01);
U.S. Cl.
CPC ...
C23C 16/06 (2013.01); C22C 5/08 (2013.01); C23C 16/0272 (2013.01); C23C 16/403 (2013.01); C23C 16/405 (2013.01); C23C 16/45525 (2013.01); C23C 16/56 (2013.01); G04B 19/12 (2013.01);
Abstract
A method is described for protecting a silver surface against tarnishing. This involves depositing a layer of a silver-copper alloy on a substrate, which may be a silver substrate. The alloy comprises between 0.1 wt % and 10 wt % of copper relative to the total weight of the alloy. At least one layer of a metal oxide or a nitride having a thickness in a range of 1 nm to 200 nm is deposited on the alloy to protect against tarnishing. The presence of copper in the silver-copper alloy enhances the alloy's adhesion without altering the silver color.