Spectacle frames made of NI alloy

US4728494A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Lorenz Berchtold · Nuremberg, DE
• Gernot Jackel · Hasselroth, DE

Key dates

• Filing date: Dec 27, 1985
• Grant date: Mar 1, 1988
• Expiry date: Dec 27, 2005

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C5/008
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Zinc-free nickel alloys for spectacle frames and spectacle parts are described which in addition to very good corrosion properties also show good shaping properties. In addition to nickel, they contain 5 to 20% copper, 2 to 6% aluminum, 0 to 1% beryllium, and up to 0.5% carbon.