Patents by Inventor Helmut Schmiechen

Helmut Schmiechen 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).

  • .beta.-carbolines and their use as tranquilizers
    Patent number: 4731358
    Abstract: New substituted .beta.-carbolines of formula I ##STR1## wherein R.sup.3 is hydrogen or a non-carboxyl based substituent, and R.sup.4-9 have various meanings,are valuable pharmaceutical products with long lasting action on the central nervous system.
    Type: Grant
    Filed: September 2, 1986
    Date of Patent: March 15, 1988
    Assignee: Schering Aktiengesellschaft
    Inventors: Andreas Huth, Dieter Rahtz, Dieter Seidelmann, Helmut Schmiechen, Helmut Biere, Claus T. Braestrup