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. 23, 1991
Filed:
Dec. 05, 1989
Applicant:
Inventors:
Dominique Thoraval, Candiac, CA;
John W Bovenkamp, Kanata, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
422 56 ; 436104 ; 436169 ; 422 57 ; 422 58 ;
Abstract
There is provided a new and useful paper chemical agent detector comprising a paper base including, associated with the base, at least one dye chosen from 4-((4-(phenylazo)phenyl)azo)-phenol (D.Y. 23), p-ethoxypenyl-azo-.alpha.-hydroxynaphthoic acid (PEN), or 3', 3', 5', 5'-tetrabromophenolphthalein ethyl ester (TBPE).