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US 4,539,176 AGranted
Low gold dental alloys
AssigneePennwalt Corporation
InventorPaul J. Cascone
Life of this patent
Estimating the term…
Abstract
A silverless low gold dental alloy contains, by weight, 10-40% gold; 3-8% gallium; 0.5-10% indium and/or tin; 0.1 to 1.5% ruthenium, or iridium, or rhenium; balance palladium. The alloy is non-staining and bondable to and compatible with porcelain.
Claims22
A low gold dental alloy consisting essentially of, by weight, about 10-40% gold;
- about 3-8% gallium;
- about 0.5-10% of at least one element selected from the group consisting of indium and tin;
- and about 0.1-1.5% of an element selected from the group consisting of ruthenium, iridium, and rhenium;
- balance palladium.
1 more element
A low gold dental alloy consisting essentially of, by weight,
- about 15 to 35% gold,
- about 4.5 to 6.5% gallium,
- about 2 to 6% tin,
- about 0.1 to 0.8% ruthenium,
- and balance palladium.
2 more elements
Dependencies are inferred from the claim text.