The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2011
Filed:
Apr. 21, 2005
Maximilian Fleischer, Höhenkirchen, DE;
Uwe Lampe, Buxtehude, DE;
Hans Meixner, Haar, DE;
Roland Pohle, Herdweg, DE;
Ralf Schneider, München, DE;
Elfriede Simon, München, DE;
Maximilian Fleischer, Höhenkirchen, DE;
Uwe Lampe, Buxtehude, DE;
Hans Meixner, Haar, DE;
Roland Pohle, Herdweg, DE;
Ralf Schneider, München, DE;
Elfriede Simon, München, DE;
Micronas GmbH, Freiburg, DE;
Abstract
A FET gas sensor having a relatively low operating temperature, for example, room temperature, is free from cross sensitivities from interfering gases by a preceding in-line filter. The sensor's service life is substantially stabilizable by using fabric-like activated charcoal filters which can be regenerated by a moderate temperature increase, and by limiting the diffusion of the analyte gas, which is made possible by the relatively small amount of gas detectable on the sensitive layer of the sensor. This substantially increases the service life of the filters. The gas sensor eliminates cross sensitivities to thereby increase the detection reliability thereof. Also, the gas sensor has relative long term stability and is economical to build. The gas sensor can read relatively weak signals generated by gas-sensitive layers, for example, without other stronger gas signals interfering with the weak signals.