Metal treatment – Stock – Containing over 50 per cent metal – but no base metal
Reexamination Certificate
2005-07-05
2005-07-05
Sheehan, John P (Department: 1742)
Metal treatment
Stock
Containing over 50 per cent metal, but no base metal
C148S430000, C420S461000, C420S462000, C420S463000, C420S464000, C420S465000, C420S466000, C420S467000, C420S468000, C420S501000, C420S502000, C420S503000, C420S504000, C420S505000, C420S506000, C420S507000, C420S508000, C420S509000, C420S510000, C420S511000, C420S512000
Reexamination Certificate
active
06913657
ABSTRACT:
A hard precious metal alloy member is constituted of a gold alloy, which has a gold Au content of from 37.50 to 98.45 wt %, and contains a hardening additive in a range of not less than 50 ppm but less than 15,000 ppm, wherein the hardening additive is constituted of gadolinium Gd only, or gadolinium Gd and at least one element selected from the group consisting of rare-earth elements other than Gd, alkaline-earth elements, silicon Si, aluminum Al, and boron B.
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Frishauf Holtz Goodman & Chick P.C.
Sheehan John P
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