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:
Apr. 17, 1990
Filed:
Sep. 01, 1988
Applicant:
Inventor:
Wolfgang Bather, Lubeck, DE;
Assignee:
Dragerwerk Aktiengesellschaft, Lubeck, US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01T / ;
U.S. Cl.
CPC ...
422 58 ; 422 59 ; 422 60 ; 422 86 ; 422 88 ;
Abstract
The invention relates to a colorimetric gas measuring device having a porous substrate accessible to the air sample to be investigated. The substrate includes a conversion zone which converts a component to be detected into a substance which leads to a coloration of an indicator in a detection zone. The gas measuring device makes possible a simple and inexpensive quantitative detection of chlorosilanes. For this purpose, the conversion zone includes silica gel and the detection zone includes a carrier impregnated with an acid indicator.