Patent · US Expired

Ozone sensor operating according to the work function measurement principle

US6915678B2 · kind B2 · utility

2Cited by

5References

23Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Maximilian Fleischer · Ehrenkirchen, DE
Hans Meixner · Haar, DE
Bernhard Ostrick · Teltow, DE
Roland Pohle · Füssen, DE
Elfriede Simon · Munich, DE
Martin Zimmer · Rheinau, DE

Key dates

Filing date	Apr 25, 2003
Grant date	Jul 12, 2005
Priority date	—
Expiry date	Apr 25, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02A50/20
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An ozone sensor has an ozone-sensitive layer containing an ozone-sensitive material which is encapsulated in a polymer or in a polymer mixture or is coated by at least one polymer or polymer mixture. Advantages result from a longer service life of the ozone-sensitive materials which, because of their high hygroscopic properties, would not be stable without encapsulation or coating. Furthermore, a polymer matrix can be selectively used as a filter or in order to eliminate interfering influences.

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