Palladium based alloy for dental applications

US5298218A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Werner Groll · Alzenau, DE
• Doris Hathaway · Hanau, DE
• Bernd Kempf · Alzenau, DE
• Gernot Schock · Bruchköbel, DE

Key dates

• Filing date: Sep 4, 1992
• Grant date: Mar 29, 1994
• Expiry date: Sep 4, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C5/04
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Palladium based dental alloys do not show unaesthetic discolorations after ceramic firing if said alloys contain 66-85% by weight palladium, 1-20% by weight gold; 0-4% by weight silver; 0-4% by weight of at least one of platinum, iron and/or cobalt; 0.5-7% by weight of each of gallium, tin and indium, whereby the amount of said components total 9-14% by weight; 0-2% by weight germanium and/or zinc; and 0-1% by weight iridium, ruthenium and/or rhenium.