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:
Jan. 20, 1976
Filed:
Aug. 29, 1973
Applicant:
Inventors:
Ernst Schaffner, Ludwigshafen, DT;
Heinz Eilingsfeld, Frankenthal, DT;
Manfred Patsch, Ludwigshafen, DT;
Assignee:
Badische Anilin- & Soda-Fabrik Aktiengesellschaft, Ludwigshafen (Rhine), DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260591 ; 260376 ; 260517 ;
Abstract
The production of anthraquinone-1-carboxylic acid by reacting a benzoyl halide with a tert.-butylxylene in the presence of ferric chloride, adding aluminum chloride, oxidizing the dimethylbenzophenone formed and cyclizing the resulting benzophenonedicarboxylic acid. The product is a starting material for the production of dyes and pesticides.