Metal treatment – Stock – Copper base
Reexamination Certificate
2002-04-18
2004-11-02
Ip, Sikyin (Department: 1742)
Metal treatment
Stock
Copper base
C420S487000
Reexamination Certificate
active
06811623
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a copper-nickel-manganese alloy and its use as a material, in particular, for the manufacture of disconnectable electrical connections and of tools and components in the offshore field and the mining industry.
BACKGROUND OF THE INVENTION
It is known to replace relatively expensive copper-beryllium alloys with low priced copper-nickel-manganese alloys, for example, in the field of electrical and electronic components.
As environmental concerns become increasingly stronger, viewpoints regarding environmental friendliness and health hazards move increasingly to the center of interest. Any type of criticism must be avoided.
Due to possible health hazardous effects of Be dusts and vapors, which can occur during improper working of Be-containing materials, the demand for Be-free materials therefore increases.
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Specification for Rotary Drill Stem Elements, API Specification 7 (Spec 7); Apr. 1, 1994 by American Petroleum Institute (pp. 20-25).
Boegel Andreas
Mueller Hilmar R.
Ohla Klaus
Flynn ,Thiel, Boutell & Tanis, P.C.
Ip Sikyin
Wieland-Werke AG
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