Patent · US Expired

Process for producing valve-metal anodes for electrolytic capacitors

US4537641A · kind A · utility

52Cited by

4References

10Claims

0Family size

Assignee

Hermann C. Starck Berlin GmbH & Co. KG · DE

Inventors

Wolf-Wigand Albrecht · Bad Harzburg, DE
Axel Hoppe · Bad Harzburg, DE
Uwe Papp · Goslar, DE
Rudiger Wolf · Vienenburg, DE

Key dates

Filing date	Mar 16, 1984
Grant date	Aug 27, 1985
Priority date	—
Expiry date	Mar 16, 2004

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22F9/20
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

To produce valve-metal anodes for electrolytic capacitors, reducing agents are added to the already sintered and/or unsintered anode bodies to improve the electrical properties, whereupon heating is carried out at temperatures above the melting point of the reducing agents and below the temperatures conventionally used for sintering the valve-metal anodes.

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