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. 26, 1978
Filed:
Nov. 18, 1976
Nalin Binduprasad Desai, Bombay, IN;
Visvanathan Ramanathan, Basel, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
A styryl dye devoid of acid, water-solubilizing groups, of the formula ##STR1## wherein two radicals Z represent groups of the formula --NR'R' and one Z represents a group of the formulae --NR'R', --OR'' or --S--R'', in which each of R', R' and R'' represents hydrogen unsubstituted phenyl, substituted phenyl, benzyl, phenylethyl, cyclohexyl, or an aliphatic radical containing up to 8 carbon atoms and R' and R'' are able to form a ring containing the amino nitrogen and the radicals --NR'R' may be the same or different, Y represents a radical of the formula --CN or --CONH.sub.2, and W represents the radical of an organic compound, which contains an active methylene group and which is bonded to the --CH.dbd. group through the carbon atom of the active methylene group, and Z.sub.3 is furthermore an unsubstituted or a substituted hydrocarbon radical containing up to 8 carbon atoms.