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. 13, 1982
Filed:
Sep. 02, 1980
Applicant:
Inventors:
Karlfried Wedemeyer, Cologne, DE;
Lutz Kienitz, Bergisch-Gladbach, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
564410 ; 564441 ;
Abstract
A process for the preparation of 4-nitroso-diphenylamine by rearranging N-nitroso-diphenylamine according to Fischer-Hepp to o-dichlorobenzene, under the effect of alcoholic hydrochloric acid and working up the suspension of the 4-nitroso-diphenylamine-hydrochloride.