Patent · US Active

Gold-based alloy, free of silver and tin, for dental copings or abutments

US8845959B2 · kind B2 · utility

0Cited by

10References

14Claims

0Family size

Assignee

Deringer-Ney, Inc. · US

Inventors

Peter Hale · Windsor, US
Edward F. Smith, III · Madison, US
Arthur S. Klein · Orange, US

Key dates

Filing date	Mar 17, 2011
Grant date	Sep 30, 2014
Priority date	—
Expiry date	Dec 12, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C5/02
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Alloys and dental copings or abutments formed of alloys include 50-60 wt % gold, 5-14 wt % platinum, 0.1-3.0 wt % iridium and the remainder palladium. Other alloys and dental copings or abutments formed of alloys include 58 wt % gold, 10 wt % platinum, 1.0 wt % iridium, and 31 wt % palladium. The alloys are capable of withstanding temperature profiles during casting and multiple high temperature exposures of porcelain firing without excessive softening. The alloys also exhibit advantageous shear strain properties giving the alloys improved manufacturability characteristics.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.