# US 4,400,350 A · Palladium dental alloy

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- Number: US 4,400,350 A
- Document ID: US4400350A
- Status: Granted
- Kind: A
- Application number: 06/427,283
- Filed: 1982-09-29
- Granted: 1983-08-23
- Earliest claimed: 1982-09-29
- Assignees: W. C. Heraeus GmbH
- Inventors: Armin C. Wagner
- Web page: https://patentgrep.com/patent/US4400350A

## CPC

- A61K 6/844: Noble metals
- C22C 5/04: Alloys based on a platinum group metal
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- C22C: ALLOYS (treatment of alloys C21D, C22F)

## Abstract

A homogeneous fine grained palladium alloy consisting essentially of ______________________________________ Weight Percent ______________________________________ Pd 70-82 Au 0.1-10 In 5-10 Cu 2-5 Ga 0.5-5 Sn 0.5-5 Co 0.9-2.7 Re 0.01-0.3 ______________________________________ and between 0.08 and 0.25% of at least one metal selected from the group consisting of Ru and Ir.

## Claims

### Claim 1

A homogeneous fine grained palladium alloy consisting essentially of
______________________________________ Weight Percent ______________________________________ Pd 70-82 Au 0.1-10 In 5-10 Cu 2-5 Ga 0.5-5 Sn 0.5-5 Co 0.9-2.7 Re 0.01-0.3 ______________________________________
and between 0.08 and 0.25% of at least one metal selected from the group consisting of Ru and Ir.

### Claim 2 (depends on 1)

The alloy of claim 1 containing between 74 and 80% Pd, between 2 and 5% Au, between 6 and 8% In, between 2.5 and 3.5% Cu, between 2.5 and 4.5% Ga, between 2.5 and 3.5% Sn, between 0.63 and 2.25% Co and between 0.07 and 0.25% Rh.

### Claim 3 (depends on 1, 2)

The alloy of claim 1 or 2 containing Ru and Ir, each in an amount between 0.04 and 0.125%.

### Claim 4 (depends on 3)

The alloy of claim 3 consisting essentially of
______________________________________ Weight Percent ______________________________________ Pd 79.9 Au 2 In 7 Cu 3 Ga 4 Sn 3 Co 0.9 Re 0.1 Ru 0.05 Ir 0.05 ______________________________________

### Claim 5 (depends on 1, 2)

The alloy of claim 1 or 2 containing Ru and Ir, each in an amount between 0.04 and 0.06%.