Metal treatment – Stock – Copper base
Reexamination Certificate
2005-03-08
2005-03-08
Sheehan, John P. (Department: 1742)
Metal treatment
Stock
Copper base
C148S442000, C420S511000, C420S587000, C420S589000
Reexamination Certificate
active
06863746
ABSTRACT:
The present invention discloses a white gold composition consisting essentially of copper, silver, zinc, and manganese, and further consisting of small amounts of tin, cobalt, silicon/copper and boron/copper. More particularly, the white gold composition of the present invention discloses a white gold composition consisting essentially of about 36% to about 57% copper, about 10% silver, about 18.2% to about 24.2% zinc, about 14% to about 28.9% manganese, and the balance further consisting of about 1% tin, about 0.025% to about 0.03% cobalt, about 0.52% silicon/copper, and about 0.2% boron/copper. An objective of the present invention is to provide for methods and compositions of casting, fabricating and soldering white gold that does not incorporate nickel or palladium. The present invention also discloses no tarnish results when hydrogen is used as a catalyst to all compositions.
REFERENCES:
patent: 3661569 (1972-05-01), Abbott
patent: 3663217 (1972-05-01), Olson et al.
patent: 3981723 (1976-09-01), Tuccillo
patent: 4049434 (1977-09-01), Sloboda et al.
patent: 4587097 (1986-05-01), Rabinkin et al.
patent: 5340529 (1994-08-01), DeWitt et al.
patent: 6342182 (2002-01-01), Vincent
patent: 6413651 (2002-07-01), Yan et al.
patent: 6576187 (2003-06-01), Ribault et al.
patent: 3146794 (1983-06-01), None
patent: 3211703 (1983-10-01), None
patent: 3414128 (1985-12-01), None
patent: 2091294 (1982-07-01), None
patent: 54-101711 (1979-08-01), None
patent: 56-166352 (1981-12-01), None
patent: 1-123057 (1989-05-01), None
Environmental Health Information Service, “Nickel and Certain Nickel Compounds,”Ninth Report on Carcinogens, 11 pgs, U.S. Department of Health and Human Services (Jan., 2001).
DLA Piper Rudnick Gray Cary US LLP
Sheehan John P.
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