Stock material or miscellaneous articles – Composite – Of quartz or glass
Patent
1989-01-25
1990-07-24
Niebling, John F.
Stock material or miscellaneous articles
Composite
Of quartz or glass
420463, 4332001, 433207, 428469, B32B 1504, C22C 504
Patent
active
049434837
ABSTRACT:
Dental restorations are made of a high palladium alloy which consists essentially of, on a weight basis, 70-82 percent palladium; 5-8 percent gold; 6.5-8 weight percent silver; 5-9 percent gallium; from 4 to 8 weight percent of a surface oxide producing modifier selected from the group consisting of indium, tin and mixtures thereof, from 0.01 up to 2 percent, ordinarily less than about 0.5 percent, of an oxygen scavenging component which is a member selected from the group consisting of germanium, lithium and mixtures thereof; and up to 2 percent of a grain refiner selected from the group consisting of ruthenium, rhenium and iridium. Alloy can be melted without the need of shielding the alloy from the atmosphere.
REFERENCES:
patent: 4201577 (1980-05-01), Ingersoll et al.
patent: 4350526 (1982-09-01), Schaffer
patent: 4399096 (1983-08-01), Agarwal et al.
patent: 4569825 (1986-02-01), Dvivedi et al.
patent: 4836984 (1989-06-01), Wagner et al.
Tucillo, "Palladium Alloys . . . Todays Choice for PFM Restorations", Trends and Techniques, Nov. 1987, pp. 14 & 31.
Ingersoll Clyde E.
McCabe Patrick J.
Schaffer Stephen P.
Niebling John F.
Phipps Margery S.
Williams Dental Company, Inc.
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