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. 04, 1978
Filed:
Feb. 25, 1977
Applicant:
Inventors:
Otto Fuchs, Frankfurt am Main, DT;
Helmut Troster, Konigstein, Taunus, DT;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
260328 ; 8179 ;
Abstract
Treating compounds of the formula ##STR1## in which the nuclei marked 'A' and 'B' can be substituted by halogen, lower alkyl, lower alkoxy or phenyl, with acid binding agents at elevated temperatures in polar organic solvents yields compounds of the formula ##STR2## in which A and B have the same meaning. The products are dyestuffs of high brillancy, pure shades, high fluorescence, excellent tinctorial strength and good fastness to light.