Patent · US Expired

Semifinished product for electric contacts made of a composite material based on silver-tin oxide and powdermetallurgical process of making said product

US5360673A · kind A · utility

13Cited by

16References

30Claims

0Family size

Assignee

Doduco GmbH & Co., Dr. Eugen Durrwachter · DE

Inventors

Ursula Mayer · Pforzheim, DE
Roland Michal · Pforzheim, DE
Karl E. Saeger · Pforzheim, DE

Key dates

Filing date	Sep 17, 1990
Grant date	Nov 1, 1994
Priority date	—
Expiry date	Sep 17, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12167
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A semifinished product for electric contact made from a composite material based on silver-tin oxide is described as well as a powder-metallurgical process of making said product. The structure of the semifinished products contains regions which contain no metal oxide or very little metal oxide in alternation with regions which contain the entire metal oxide component or a greatly predominating/share thereof in a fine division.

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