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:
Jun. 12, 1990
Filed:
Mar. 11, 1988
Applicant:
Inventor:
Wolfgang May, Lubeck, DE;
Assignee:
Dragerwerk Aktiengesellschaft, Lubeck, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
422 60 ; 422 55 ; 422 58 ; 422 86 ; 422 88 ; 436124 ; 436167 ; 436178 ; 436181 ; 436902 ;
Abstract
The invention is directed to a gas measuring device having a pretreatment device for converting the gas to be detected into a substance indicatable via a colorimetric indicator. The gas measuring device simplifies the detection of fluorine and includes a pretreatment device which has a chloride compound containing a metal of the first or second main groups of the periodic system and is exposed to the fluorine and has a chlorine indicator.