Patents by Inventor Johannes H. A. Bartholomaeus

Johannes H. A. Bartholomaeus 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).

  • Sustained release drug formulation containing a tramadol salt
    Patent number: 5601842
    Abstract: A drug formulation of tramadol or a tramadol salt in orally administrable tablet form containing at least one pharmaceutically acceptable matrixing agent is disclosed from which a non-moisture sensitive, physiologically acceptable tramadol salt is sustained released.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: February 11, 1997
    Assignee: Gruenenthal GmbH
    Inventor: Johannes H. A. Bartholomaeus