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:
Oct. 03, 1978
Filed:
Nov. 05, 1976
Applicant:
Inventors:
Otto Fuchs, Frankfurt am Main, DE;
Adolf Kroh, Munster, Taunus, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ; 2602 / ;
Abstract
Naphthalimide-4,5-dicarboxylic acids of the formula ##STR1## or the anhydrides thereof, wherein R is alkyl having 1 to 8 carbon atoms or hydroxyalkyl or alkoxyalkyl having each 1 to 6 carbon atoms in the alkyl or alkoxy portion, which are obtained by reacting an alkali metal salt of naphthalene-1,4,5,8-tetracarboxylic acid in an aqueous solution with amines of the formula