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:
Nov. 24, 1987
Filed:
Feb. 20, 1986
Albert Bender, Nuremberg, DE;
Dieter Guenther, Kelkheim, DE;
Hoechst Aktiengesellschaft, , DE;
Abstract
Method and composition for a ketosultam of the general formula ##STR1## in which R.sub.1 and R.sub.2 are identical or different and each denote hydrogen, (C.sub.1 to C.sub.8)-alkyl, which is optionally substituted by one or several halogen atoms, hydroxy groups, cyano groups or (C.sub.1 to C.sub.4)-alkoxy groups, or phenyl, R.sub.3 denotes hydrogen or a (C.sub.1 to C.sub.4)-alkyl group or (C.sub.1 to C.sub.4)-alkoxy group, n is a number from 1 to 4, or R.sub.1, R.sub.2 and R.sub.3, together with the corresponding aminophenyl group, denote julolidinyl or N-(C.sub.1 to C.sub.3)-alkylcarbazol-3-yl. The compounds are used in the preparation of sensitizers and dyes.