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:
Sep. 23, 1986
Filed:
Mar. 04, 1985
Applicant:
Inventors:
Bernhard Westrup, Lubeck, DE;
Joachim Marcoll, Lubeck, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
436106 ; 436109 ; 436127 ; 436145 ; 422 56 ; 422 57 ; 422 86 ; 422 87 ; 422 61 ;
Abstract
Organic isocyanates are detected with an indicator comprising bis-4-(dimethylamino)-phenyl-methylenimine-hydrochloride provided on a carrier along with a catalyst for its reaction with the organic isocyanates contained in a tested gas. Through an acid developer brought subsequently into contact with the indicator, this reaction occurs and thus the concentration of the organic isocyanates is made evident by a red coloration of the indicator.