Patents by Inventor Alex Prox

Alex Prox 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).

  • Substituted 6-benzyl-2H-3,4,5,6-tetrahydro-(1,3)-oxazines
    Patent number: 5114935
    Abstract: Novel compounds of the general formula ##STR1## which have antitussive activity, wherein R.sub.1 -R.sub.4 are as defined herein.
    Type: Grant
    Filed: August 15, 1990
    Date of Patent: May 19, 1992
    Assignee: Dr. Karl Thomae GmbH
    Inventors: Helmut Ballhause, Gunther Engelhardt, Claus A. Landgraf, Norbert Mayer, Willy Roth, Kurt Schumacher, Alex Prox