Patent · US Expired

Potassium superoxide pellet

US4731197A · kind A · utility

4Cited by

4References

6Claims

0Family size

Assignee

DRAGERWERK AKTIEGESELLSCHAFT · DE

Inventors

Wolfgang Eckstein · Sereetz, DE
Carl-Ernst van der Smissen · Lübeck, DE
Rainer Ernst · Curau, DE
Bernhard Westrup · Lübeck, DE

Key dates

Filing date	Mar 19, 1987
Grant date	Mar 15, 1988
Priority date	—
Expiry date	Mar 19, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01B15/0435
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A pellet of potassium superoxide, as the oxygen-yielding chemical, with an additive of catalyst material for stimulating the release of oxygen is improved by providing a concentrated addition of the catalyst material on the surface of the pellet; this permits a uniform release of oxygen during the entire period of the use of the pellet. With the pellet, oxygen is split off as required at the very outset of breathing with the breathing apparatus and a release of oxygen in excess of demand as use continues is avoided. A pellet of this type includes a compressed core body containing substantially potassium superoxide and surrounded by a compressed jacket made of highly catalyzed potassium superoxide material.

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