Patent · US Expired

Use of palladium-silver alloys for the manufacture of dentures

US5560742A · kind A · utility

1Cited by

5References

5Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Werner Groll · Alzenau, DE
Gernot Schoeck · Bruchköbel, DE
Doris Hathaway · Hanau, DE
Manfred Stuemke · Pforzheim, DE

Key dates

Filing date	Feb 27, 1989
Grant date	Oct 1, 1996
Priority date	—
Expiry date	Feb 27, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C5/06
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Gold-free palladium-silver alloys for dentures [dental prostheses] which alloys can be veneered without color changes with dental ceramics and can be easily removed from the mold after the casting contain 45 to 80% by weight palladium, 7 to 50% by weight silver, 0 to 5% by weight gold, 0 to 5% by weight tin, 0 to 5% by weight indium, 0 to 3% by weight zinc, 0 to 2% by weight copper, 0 to 1% by weight ruthenium, iridium and/or rhenium, 0 to 7% by weight gallium, 0 to 5% by weight cobalt and 0 to 3% by weight germanium, whereby of the elements gallium, cobalt and germanium at least two must be present with contents totalling 2 to 9% by weight.

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