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:
May. 27, 1986
Filed:
Aug. 23, 1984
Applicant:
Inventor:
Hasso Hertel, Mulheim am Rheim, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06P / ; C07C / ;
U.S. Cl.
CPC ...
8436 ; 8649 ; 564431 ; 564433 ; 564441 ; 564442 ;
Abstract
Acid nitrodyestuffs are prepared by treating aminonitrodiphenylaminesulfonic acids with an oxidizing agent in an aqueous medium, the oxidizing agent being hypochlorous acid or its alkali metal or alkaline earth metal salts and the reaction taking place at above pH 4 and at a temperature between 0.degree. and 100.degree. C. The dyestuffs thus obtainable dye even fresh full chrome grained leather in deep shades.