Patents by Inventor Gerard Walther

Gerard Walther 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).

  • Patent number: 4038397
    Abstract: Pharmaceutical compositions containing as an active ingredient a compound of the formula ##STR1## wherein R.sub.1 is methyl, ethyl or propyl, R.sub.2 is hydrogen, methyl or ethyl,R.sub.3 is hydrogen or methyl,R.sub.4 is ##STR2## R.sub.5 is hydrogen, methyl or acetyl, or a non-toxic, pharmacologically acceptable acid addition salt thereof; and a method of using the same as analgesics.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: July 26, 1977
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Herbert Merz, Adolf Langbein, Gerard Walther, Klaus Stockhaus