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. 13, 1983
Filed:
Sep. 02, 1982
Applicant:
Inventors:
Klaus-Peter Heise, Bergisch Gladbach, DE;
Karlfried Wedemeyer, Cologne, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564406 ;
Abstract
The invention relates to a process for the preparation of 4-nitrodiphenylamines by the reaction of halogenonitrobenzenes with primary aromatic amines in the presence of copper or a copper compound, a neutralizing agent and a cyclic diaza compound.