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:
Feb. 17, 1998
Filed:
Jun. 11, 1996
Applicant:
Inventors:
Ulrike Kufner-Muhl, Ingelheim, DE;
Helmut Ensinger, Ingelheim am Rhein, DE;
Joachim Mierau, Mainz, DE;
Franz Josef Kuhn, Gau-Algesheim, DE;
Erich Lehr, Waldalgesheim, DE;
Enzio Muller, Bingen/Rh., DE;
Assignee:
Boehringer Ingelheim KG, Ingelheim am Rhein, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; A61K / ;
U.S. Cl.
CPC ...
544 61 ; 544118 ; 544269 ; 544270 ; 544271 ; 544272 ; 544273 ;
Abstract
Xanthine derivatives of formula ##STR1## wherein R.sub.1 is hydrogen, alkyl or alkynyl, R.sub.2 is different and is alkyl, alkynyl, phenyl-alkylene, phenyl alkenylene, cycloalkyl, inter alia, R.sub.3 is cycloalkyl, phenyl, norbornane, inter alia and R.sub.4 is hydrogen, methyl, benzyl, inter alia.