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. 11, 1977
Filed:
Jun. 05, 1974
Applicant:
Inventors:
Hans-Juergen Quadbeck-Seeger, Ludwigshafen, DT;
Helmut Hoch, Ludwigshafen, DT;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen (Rhine), DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2604 / ;
Abstract
Dimethylaminobenzenecarboxylic acid esters are produced by reaction of nitrobenzenecarboxylic acid esters with formaldehyde and hydrogen under pressure in the presence of a hydrogenation catalyst containing metals of atomic numbers 24 to 29 and of a weak acid, at temperatures from 35.degree. to 150.degree. C. The products are starting materials for the synthesis of dyes, especially of crystal violets, and of reactive dyes and pesticides.