Patents by Inventor Angela Hagen

Angela Hagen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 3-cyano-5,4'-bipyridine-1'-oxide compounds and pharmaceutical compositions and methods containing the same
    Patent number: 5162533
    Abstract: A 3-cyano-5,4'-bipyridine-1'-oxide of the formula ##STR1## and their pharmaceutically acceptable acid addition salts, wherein R is an amino, alkoxy, oxyalkoxy or chloro residue, have heart stimulating cardiotonic and vasodiolatory properties. They can be preparaed by (a) converting an R-substituted-3-cyano-bipyridine to its corresponding N-oxide, or (b) by substituting an R-residue or an R-unsubstituted precursor of the conpound of fomula (i), and if required, converting the product into its pharmaceutically acceptable acid addition salt.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: November 10, 1992
    Assignee: Arzneimittelwerk Dresden G.m.b.H.
    Inventors: Erhard Klauschenz, Volker Hagen, Angela Hagen, Peter Muschick, Brigitte Schlegel, Sabine Heer, Gottfried Faust, Hans-Joachim Jansch