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:
Oct. 08, 1991
Filed:
Oct. 30, 1990
Walter Fabinski, Kriftel, DE;
Hartmann und Braun A.G., Frankfurt am Main, DE;
Abstract
Nondispersive infrared gas analyzer for the concurrent measurement in the concentration of several components contained in a gas sample, and including a source of and modulator for infrared radiation, a measuring and reference chamber are traversed by said beams, at least two serially pneumatic radiation detectors each having a front and a rear chamber filled with a respective component and each provided for measuring the pressure differential between the respective chambers, a filter disposed between the first detectors upstream and having opaque range which covers at least a major absorption band of the component filling the downstream detector but having a region of transparency which includes at least one secondary absorption band of that component.