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:
May. 11, 1982
Filed:
Sep. 30, 1980
Kurt Leichnitz, Gross-Gronau, DE;
Abstract
An apparatus for testing copper concentration of a test gas comprises a glass tube having breakoff points at each end with an ampoule filled with a nitric acid arranged upstream of a filter which is followed downstream by a reaction layer of silica gel impregnated with a reagent for copper. The glass tube is opened by breaking off breakoff points at each end and the gas to be tested is pumped through the tube so that any suspended particles including copper particles will be deposited on the filter layer too. Thereafter, the ampoule within the glass tube is broken to release the nitric acid which is directed through the filter layer to the reaction layer. The nitric acid which reacts with the copper deposited on the filter layer moves to the reaction layer and produces a discoloration which is proportional to the amount of copper filtered out from the test air. A chart is made up to provide a color standard which is proportional to the copper concentration in the test gas and the discoloration produced in the reaction layer is compared with this color standard to determine the quantity of copper.