IP Library › Granted Patent US 6,936,117
Granted Patent B1
US 6,936,117 · App. 10/902,369 · Granted Aug 30, 2005

Silver alloy with color fastness

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Quick Facts
Patent No.
US 6,936,117
App. No.
10/902,369
Granted
Aug 30, 2005
Kind
B1
Abstract

A silver alloy with color fastness includes silver as major component; and a small quantity of copper, zinc and nickel so that it can be prevented to oxidize, and it can use metal with easy procurement without special metal and manufacture a alloy with color fastness.

Claims (2)

1. Silverware comprised of an oxidation-resistant colorfast alloy consisting of, by weight, 1.25 to 1.35% copper, 0.35 to 0.45% zinc, 0.24 to 0.27% nickel, and the balance, silver.

2. Tableware comprised of an oxidation-resistant colorfast alloy consisting of, by weight, 1.25 to 1.35% copper, 0.35 to 0.45% zinc, 0.24 to 0.27% nickel, and the balance, silver.

Assignments (3)
CHANGE OF ADDRESS Recorded Feb 1, 2019
From: FESTARIA HOLDINGS CO., LTD.
To: FESTARIA HOLDINGS CO., LTD.
Reel/Frame 048208/0315 →
CHANGE OF NAME Recorded Feb 1, 2019
From: SADAMATSU COMPANY LIMITED
To: FESTARIA HOLDINGS CO., LTD.
Reel/Frame 048227/0903 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 16, 2009
From: ISHIKAWA, SEIICHIRO; SUZUKI, KEIICHI
To: SADAMATSU COMPANY LIMITED
Reel/Frame 022562/0530 →