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:
Feb. 27, 1990
Filed:
Mar. 11, 1988
Applicant:
Inventor:
Johannes Heckmann, Lubeck, DE;
Assignee:
Dragerwerk Aktiengesellschaft, Lubeck, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
422 87 ; 422 58 ; 422 59 ; 436902 ;
Abstract
The invention is directed to a colorimetric gas measuring device with an indicator path which is accessible for the gas to be detected via at least one inlet opening and which, however, is otherwise closed off with respect to the ambient. The colorimetric gas measuring device is improved so that the measuring time is extended and the sensitivity increased while at the same time providing a space-saving configuration. The gas measuring device is small and convenient to handle and can be carried on the person. For this purpose, the indicator paths are configured so as to extend in circuitous manner.