Substrate comprising a silver-plated surface protected against silver tarnishing and method for manufacturing such a substrate

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12163217
APP PUB NO 20210348270A1
SERIAL NO

17278139

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Abstract

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A substrate includes a final silver-plated surface protected against silver tarnishing by a protective coat having a thickness between 1 nm and 200 nm, the protective coat includes a first coat of Al2O3 deposited on said final silver-plated surface and having a thickness between 0.5 nm and 100 nm, and on the first coat of Al2O3, a second coat of TiO2 having a thickness between 0.5 nm and 100 nm, the substrate including a coat of a silver and copper alloy comprising between 0.1% and 10% by weight of copper with respect to the total weight of the alloy, forming said final silver-plated surface, said coat of a silver and copper alloy having a thickness between 1000 nm and 3000 nm. Embodiments also relate to a method for manufacturing such a substrate.

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Patent Owner(s)

Patent OwnerAddress
THE SWATCH GROUP RESEARCH AND DEVELOPMENT LTDRUE DES SORS 3 MARIN 2074

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Faure, Cédric Cortaillod, CH 6 6
Manasterski, Christian Colombier, CH 7 3
Spassov, Vladislav Praz, CH 9 78

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