Metal treatment – Stock – Copper base
Reexamination Certificate
2007-05-11
2010-10-05
Ip, Sikyin (Department: 1793)
Metal treatment
Stock
Copper base
C420S470000, C420S471000, C420S472000, C420S473000
Reexamination Certificate
active
07806996
ABSTRACT:
A copper-based alloy essentially includes 5.0 to 10.0 wt % of Zn, 2.8 to 5.0 wt % of Sn, 0.4 to 3.0 wt % of Bi, 0<Se≦0.35 wt %, 0<P≦0.5, one of 0<Sb≦2.2 wt % and 0<Ni≦4.8 wt %, and a balance of Cu and unavoidable impurities. It may essentially includes 5.0 to 10.0 wt % of Zn, 2.8 to 5.0 wt % of Sn, 0.4 to 3.0 wt % of Bi, 0≦Se≦0.35 wt %, 0<P<0.5 wt %, one of 0<Sb≦2.2 wt % and 0<Ni≦4.8 wt %, 1.20 to 4.90 Vol. % of at least one selected from the group consisting of a non-solid solution substance secured with Bi and a non-solid solution secured with Bi and Se, and a balance of Cu and unavoidable impurities.
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Report on Development of the Lead-Free Copper Alloy Casting, The Materials Process Technolgoy Center, Research Report 567 (ISSN 1342-565X), Feb. 28, 2002.
Hirata Yukihiro
Kurose Kazuhito
Ozasa Tomoyuki
Terui Hisanori
Ip Sikyin
Kitz Corporation
Wenderoth , Lind & Ponack, L.L.P.
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