Patents by Inventor Karl Fritzemeier

Karl Fritzemeier 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).

  • 8-En-19 11 .beta.-bridged steroids, their production and pharmaceutical preparations containing them
    Patent number: 5478956
    Abstract: 8-En-19,11.beta.-bridged steroids of general formula I ##STR1## that have the 8,9-double bond as a new structural feature, and a process for their production are described. The substituents R.sup.1 R.sup.4 -Y, R.sup.4' -Y.sup.', X and Z have the meaning indicated in the description. The new compounds especially have at their disposal pronounced antigestagen effectivenss and are suitable for the production of pharmaceutical preparations.
    Type: Grant
    Filed: September 28, 1993
    Date of Patent: December 26, 1995
    Assignee: Schering Aktiengesellschaft
    Inventors: Eckhardt Ottow, Gunter Neef, Walter Elger, Martin Schneider, Karl Fritzemeier