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. 08, 1980
Filed:
Mar. 20, 1978
Dieter Gunther, Kelkheim, DE;
Rudiger Erckel, Hofheim am Taunus, DE;
Gunter Rosch, Bad Soden am Taunus, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Compounds of the formula I ##STR1## in which X is O or S, R.sub.1 and R.sub.2, being identical or different, are radicals selected from the group of hydrogen, fluorine or chlorine atoms, phenyl, C.sub.1 -C.sub.9 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -dialkyl-amino, acylamino radicals, or optionally functionally modified carboxy or sulfo groups, two adjacent radicals R.sub.1 and R.sub.2 together optionally representing a benzo ring, a lower alkylene or a 1,3-dioxapropylene group, and A is a group of the formulae ##STR2## in which R.sub.3 and R.sub.4, independently from each other, are hydrogen, fluorine or chlorine atoms or C.sub.1 -C.sub.4 -alkyl groups.