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. 17, 1985
Filed:
Dec. 18, 1981
Applicant:
Inventor:
Hans R Meyer, Binningen, CH;
Assignee:
Ciba-Ceigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548327 ;
Abstract
The novel benzimidazoles have the formula ##STR1## in which A is the radical ##STR2## R.sub.1 is cyanomethyl, 1-cyanoethyl or, if n is the number 1, also 2-cyanoethyl or C.sub.3-6 -carboalkoxymethyl, R.sub.2 is C.sub.1-4 -alkyl or C.sub.3-4 -alkenyl, R.sub.3 is cyanomethyl, cyanoethyl or C.sub.3-6 -carboalkoxymethyl, R.sub.4 and R.sub.5 independently of one another are hydrogen or chlorine, X.sup..crclbar. is a colorless anion of an organic or inorganic acid and n is the number 0 or 1. They are used for the fluorescent brightening of organic materials.