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. 24, 1994
Filed:
Dec. 23, 1991
Gunter Frey, Ellerstadt, DE;
Gerd Zimmermann, Mannheim, DE;
Boehringer Mannheim GmbH, Mannheim, DE;
Abstract
The present invention is concerned with aniline derivatives of the general formula: ##STR1## wherein R.sub.1 is hydrogen or a lower alkyl or aryl, R.sub.2 is hydrogen or a lower alkyl which can be substituted by hydroxyl, amino carboxyl, lower alkoxycarbonyl, lower alkanoylamide lower alkyl or aryl or by a group of the structure ##STR2## is which R.sub.5 and R.sub.6 have the meanings given hereinafter, R.sub.3 is a hydrogen or halogen atom or a carboxyl group, R.sub.4 and R'.sub.4, which can be the same or different, are hydrogen or halogen, carboxyl or lower alkoxy or lower alkyl radicals which are preferably in the m-position, R.sub.5 is hydrogen or a lower alkyl and R.sub.6 is hydroxyl or a lower alkoxy, lower alkyl or aryl radical; and of the salts thereof with acids and bases useful as a color former in the Trinder reaction for the detection of hydrogen peroxide or hydrogen peroxide-forming systems or peroxidase or peroxidate-acting substances or together with an oxidation agent for the detection of aromatic amines or of systems forming such amines.