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:
Oct. 30, 1990
Filed:
Jul. 02, 1985
Ulfert Deneke, Rimbach-Zotzenbach, DE;
Werner Guthlein, Mannheim, DE;
Wolfgang Weckerle, Grunstadt, DE;
Hans Wielinger, Weinheim, DE;
Boehringer Mannheim GmbH, Manheim, DE;
Abstract
The invention provides new redox indicators and uses for these redox compounds (I): ##STR1## Wherein X is oxygen or sulphur, R.sub.1 is julolidine or tetrahydroquinoline, which can carry an alkyl radical on the nitrogen atom which, in turn, can be substituted by a sulphuric, phosphonic or carboxylic acid residues, or is (II); wherein R.sub.4 is hydroxyl or a mono- or dialkylated amino group, R.sub.5 and R.sub.6, which can be the same or different, are hydrogen, alkyl or alkoxy, R.sub.2 is hydrogen or alkyl, julolidine or tetrahydroquinoline, which can carry an alkyl on the nitrogen atom which alkyl can be substituted by sulphuric, phosphonic or carboxylic acids, or is III; wherein R.sub.5 and R.sub.6 are the same as in R.sub.1 and R'.sub.4 is hydroxyl, an amino or a mono-or dialkylated amino group, whereby the alkyl radicals can be substituted one or more times by hydroxyl, alkoxy, halogen, morpholine or a sulphuric, carboxylic or phosphonic acid residue, which acids can also be esterified, and R.sub.3 is the same as R.sub.2 or is an alkyl substituted by hydroxyl, alkoxy, dialkylamino or phenyl, or is cycloalkyl, phenyl or pyridyl; as well as the salts thereof.