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. 26, 1991
Filed:
Nov. 17, 1989
Applicant:
Inventors:
Wolf-Ulrich Nickel, Bad Soden am Taunus, DE;
Wolfgang Ruger, Kelkheim, DE;
Hansjorg Urbach, Kronberg/Taunus, DE;
Franz Hock, Dieburg, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; A61K / ;
U.S. Cl.
CPC ...
514412 ; 548452 ;
Abstract
The present invention relates to compounds of the formula I ##STR1## in which R.sup.1 to R.sup.4 are defined in the description, processes for their preparation, their use for the treatment and prophylaxis of cognitive dysfunctions and pharmaceuticals containing them and processes for their preparation.