Metal treatment – Stock – Copper base
Reexamination Certificate
2006-06-20
2010-10-26
Ip, Sikyin (Department: 1793)
Metal treatment
Stock
Copper base
C148S433000, C148S434000, C148S435000, C420S472000, C420S473000, C420S476000
Reexamination Certificate
active
07819992
ABSTRACT:
A member for water works is proposed in which the content of lead is limited to a very small values while maintaining its mechanical properties, castability, machinability, pressure resistance, etc. to levels equivalent to those of conventional copper alloys containing lead.A copper alloy is produced which contains not less than 2.0% by weight and not more than 5.9% by weight of tin, not less than 1.5% by weight and not more than 5.0% by weight of nickel, not less than 5.0% by weight and not more than 12.1% by weight of zinc, not less than 0.4% by weight and not more than 3.3% by weight of bismuth, and not less than 0.009% by weight and not more than 0.15% by weight of phosphorus, the balance being copper and impurities.
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International Search Report issued Jul. 18, 2006 in the International (PCT) Application PCT/JP2006/312682 of which the present application is the U.S. National Stage.
Hirai Yoshimasa
Maedono Hiroaki
Maedono, legal representative Chizuko
Yamamoto Masaaki
Ip Sikyin
Kurimoto Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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