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US 4,728,494 AGranted
Spectacle frames made of NI alloy
AssigneeDegussa AG
InventorsLorenz Berchtold, Gernot Jackel
Life of this patent
Estimating the term…
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.
Claims8
A spectacle frame made of an alloy consisting of 5 to 20% copper, 2 to 6% aluminum, 0 to 1% beryllium, 0 to 0.5% carbon and balance nickel.
Dependencies are inferred from the claim text.