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:
Aug. 18, 1981
Filed:
May. 12, 1980
Walter-Gunar Friebe, Darmstadt, DE;
Max Thiel, Mannheim, DE;
Wolfgang Kampe, Heddesheim, DE;
Otto-Henning Wilhelms, Weinheim-Rittenweier, DE;
Androniki Roesch, Mannheim, DE;
Boehringer Mannheim GmbH, Mannheim, DE;
Abstract
The present invention provides xanthine derivatives of the general formula: ##STR1## wherein one of the symbols R.sub.1 and R.sub.2 stands for a methyl radical and the other for a radical of the general formula: ##STR2## wherein R.sub.3 is a hydrogen atom or an acyl radical; and the pharmacologically acceptable salts thereof. The present invention also provides processes for the preparation of these compounds and pharmaceutical compositions containing them and is also concerned with the use thereof for the preparation of pharmaceutical compositions for the treatment of allergies.